/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/POPL2022/add-sub04.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 18:50:06,914 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 18:50:06,916 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 18:50:06,946 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-21 18:50:06,946 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-21 18:50:06,948 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-21 18:50:06,950 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-21 18:50:06,954 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-21 18:50:06,955 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-21 18:50:06,958 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-21 18:50:06,959 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-21 18:50:06,960 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-21 18:50:06,960 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-21 18:50:06,962 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-21 18:50:06,963 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-21 18:50:06,967 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-21 18:50:06,968 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-21 18:50:06,968 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-21 18:50:06,970 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-21 18:50:06,974 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-21 18:50:06,975 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-21 18:50:06,975 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-21 18:50:06,976 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-21 18:50:06,978 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-21 18:50:06,982 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-21 18:50:06,988 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 18:50:06,988 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 18:50:06,989 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 18:50:06,992 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf [2021-08-21 18:50:07,019 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 18:50:07,019 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 18:50:07,021 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 18:50:07,022 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 18:50:07,022 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 18:50:07,022 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 18:50:07,022 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 18:50:07,022 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 18:50:07,022 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 18:50:07,022 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 18:50:07,023 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 18:50:07,023 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 18:50:07,023 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 18:50:07,023 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 18:50:07,024 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 18:50:07,024 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 18:50:07,024 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 18:50:07,024 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 18:50:07,024 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 18:50:07,024 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 18:50:07,024 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 18:50:07,024 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 18:50:07,025 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 18:50:07,025 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 18:50:07,025 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 18:50:07,025 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 18:50:07,025 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 18:50:07,025 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 18:50:07,025 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 18:50:07,025 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-21 18:50:07,025 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 18:50:07,332 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 18:50:07,360 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 18:50:07,362 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 18:50:07,363 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 18:50:07,364 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 18:50:07,364 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/add-sub04.bpl [2021-08-21 18:50:07,365 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/add-sub04.bpl' [2021-08-21 18:50:07,382 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 18:50:07,384 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 18:50:07,385 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 18:50:07,385 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 18:50:07,385 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 18:50:07,394 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "add-sub04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:50:07" (1/1) ... [2021-08-21 18:50:07,399 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "add-sub04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:50:07" (1/1) ... [2021-08-21 18:50:07,405 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 18:50:07,406 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 18:50:07,406 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 18:50:07,407 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 18:50:07,412 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "add-sub04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:50:07" (1/1) ... [2021-08-21 18:50:07,412 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "add-sub04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:50:07" (1/1) ... [2021-08-21 18:50:07,412 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "add-sub04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:50:07" (1/1) ... [2021-08-21 18:50:07,413 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "add-sub04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:50:07" (1/1) ... [2021-08-21 18:50:07,415 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "add-sub04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:50:07" (1/1) ... [2021-08-21 18:50:07,417 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "add-sub04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:50:07" (1/1) ... [2021-08-21 18:50:07,418 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "add-sub04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:50:07" (1/1) ... [2021-08-21 18:50:07,418 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 18:50:07,419 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 18:50:07,419 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 18:50:07,419 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 18:50:07,420 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "add-sub04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:50:07" (1/1) ... [2021-08-21 18:50:07,425 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 18:50:07,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:07,442 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-21 18:50:07,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-21 18:50:07,480 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 18:50:07,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 18:50:07,481 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 18:50:07,481 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Thread given in one single declaration [2021-08-21 18:50:07,481 INFO L130 BoogieDeclarations]: Found specification of procedure Thread [2021-08-21 18:50:07,481 INFO L138 BoogieDeclarations]: Found implementation of procedure Thread [2021-08-21 18:50:07,482 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-21 18:50:07,590 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 18:50:07,590 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-08-21 18:50:07,592 INFO L202 PluginConnector]: Adding new model add-sub04.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:50:07 BoogieIcfgContainer [2021-08-21 18:50:07,592 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 18:50:07,594 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 18:50:07,594 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 18:50:07,595 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 18:50:07,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "add-sub04.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:50:07" (1/2) ... [2021-08-21 18:50:07,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@541130c2 and model type add-sub04.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:50:07, skipping insertion in model container [2021-08-21 18:50:07,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "add-sub04.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:50:07" (2/2) ... [2021-08-21 18:50:07,597 INFO L111 eAbstractionObserver]: Analyzing ICFG add-sub04.bpl [2021-08-21 18:50:07,609 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 18:50:07,610 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 18:50:07,610 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 18:50:07,610 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 18:50:07,652 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:50:07,653 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:50:07,653 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:50:07,653 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:50:07,653 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:50:07,654 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:50:07,654 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:50:07,654 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:50:07,654 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:50:07,654 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:50:07,654 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:50:07,655 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:50:07,655 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:50:07,655 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:50:07,655 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:50:07,655 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:50:07,656 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:50:07,656 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:50:07,656 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:50:07,656 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:50:07,656 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:50:07,656 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:50:07,657 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:50:07,657 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:50:07,659 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:50:07,667 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:50:07,670 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:50:07,674 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:50:07,687 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-08-21 18:50:07,726 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 18:50:07,733 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-21 18:50:07,733 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-08-21 18:50:08,030 INFO L276 IsEmpty]: Start isEmpty. Operand has 428 states, 295 states have (on average 1.8271186440677967) internal successors, (539), 427 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:08,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 18:50:08,048 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:08,048 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:08,049 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:08,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:08,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1601367377, now seen corresponding path program 1 times [2021-08-21 18:50:08,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:08,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178680747] [2021-08-21 18:50:08,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:08,063 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:08,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:08,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:50:08,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:08,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178680747] [2021-08-21 18:50:08,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178680747] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:50:08,172 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:50:08,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-21 18:50:08,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870690045] [2021-08-21 18:50:08,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 18:50:08,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:08,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 18:50:08,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:50:08,187 INFO L87 Difference]: Start difference. First operand has 428 states, 295 states have (on average 1.8271186440677967) internal successors, (539), 427 states have internal predecessors, (539), 0 states have call successors, (0), 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, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:08,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:08,234 INFO L93 Difference]: Finished difference Result 588 states and 756 transitions. [2021-08-21 18:50:08,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 18:50:08,236 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 18:50:08,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:08,247 INFO L225 Difference]: With dead ends: 588 [2021-08-21 18:50:08,247 INFO L226 Difference]: Without dead ends: 211 [2021-08-21 18:50:08,248 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:50:08,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-08-21 18:50:08,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 174. [2021-08-21 18:50:08,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.5260115606936415) internal successors, (264), 173 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:08,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 264 transitions. [2021-08-21 18:50:08,288 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 264 transitions. Word has length 14 [2021-08-21 18:50:08,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:08,289 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 264 transitions. [2021-08-21 18:50:08,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:08,289 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 264 transitions. [2021-08-21 18:50:08,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 18:50:08,290 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:08,290 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:08,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 18:50:08,290 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:08,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:08,292 INFO L82 PathProgramCache]: Analyzing trace with hash 324756857, now seen corresponding path program 1 times [2021-08-21 18:50:08,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:08,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159286805] [2021-08-21 18:50:08,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:08,293 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:08,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:08,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:50:08,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:08,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159286805] [2021-08-21 18:50:08,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159286805] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:50:08,398 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:50:08,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 18:50:08,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562389669] [2021-08-21 18:50:08,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:50:08,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:08,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:50:08,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:50:08,401 INFO L87 Difference]: Start difference. First operand 174 states and 264 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:08,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:08,439 INFO L93 Difference]: Finished difference Result 236 states and 372 transitions. [2021-08-21 18:50:08,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:50:08,440 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 18:50:08,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:08,443 INFO L225 Difference]: With dead ends: 236 [2021-08-21 18:50:08,444 INFO L226 Difference]: Without dead ends: 231 [2021-08-21 18:50:08,444 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:50:08,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-08-21 18:50:08,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 180. [2021-08-21 18:50:08,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.5754189944134078) internal successors, (282), 179 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:08,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 282 transitions. [2021-08-21 18:50:08,463 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 282 transitions. Word has length 17 [2021-08-21 18:50:08,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:08,463 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 282 transitions. [2021-08-21 18:50:08,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:08,463 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 282 transitions. [2021-08-21 18:50:08,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 18:50:08,464 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:08,464 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:08,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 18:50:08,464 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:08,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:08,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1940208501, now seen corresponding path program 1 times [2021-08-21 18:50:08,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:08,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124662099] [2021-08-21 18:50:08,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:08,465 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:08,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:08,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:50:08,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:08,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124662099] [2021-08-21 18:50:08,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124662099] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:50:08,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:50:08,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 18:50:08,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305199250] [2021-08-21 18:50:08,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:50:08,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:08,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:50:08,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:50:08,510 INFO L87 Difference]: Start difference. First operand 180 states and 282 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:08,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:08,536 INFO L93 Difference]: Finished difference Result 254 states and 422 transitions. [2021-08-21 18:50:08,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:50:08,537 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 18:50:08,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:08,538 INFO L225 Difference]: With dead ends: 254 [2021-08-21 18:50:08,538 INFO L226 Difference]: Without dead ends: 249 [2021-08-21 18:50:08,538 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:50:08,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-08-21 18:50:08,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 195. [2021-08-21 18:50:08,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.690721649484536) internal successors, (328), 194 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:08,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 328 transitions. [2021-08-21 18:50:08,543 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 328 transitions. Word has length 17 [2021-08-21 18:50:08,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:08,543 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 328 transitions. [2021-08-21 18:50:08,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:08,544 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 328 transitions. [2021-08-21 18:50:08,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 18:50:08,544 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:08,544 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:08,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 18:50:08,545 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:08,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:08,545 INFO L82 PathProgramCache]: Analyzing trace with hash 587158717, now seen corresponding path program 1 times [2021-08-21 18:50:08,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:08,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725812324] [2021-08-21 18:50:08,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:08,546 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:08,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:08,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:50:08,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:08,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725812324] [2021-08-21 18:50:08,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725812324] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:50:08,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:50:08,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 18:50:08,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214256618] [2021-08-21 18:50:08,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:50:08,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:08,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:50:08,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:50:08,659 INFO L87 Difference]: Start difference. First operand 195 states and 328 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:08,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:08,704 INFO L93 Difference]: Finished difference Result 261 states and 443 transitions. [2021-08-21 18:50:08,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:50:08,705 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 18:50:08,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:08,706 INFO L225 Difference]: With dead ends: 261 [2021-08-21 18:50:08,706 INFO L226 Difference]: Without dead ends: 256 [2021-08-21 18:50:08,706 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:50:08,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-08-21 18:50:08,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 205. [2021-08-21 18:50:08,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.7450980392156863) internal successors, (356), 204 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:08,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 356 transitions. [2021-08-21 18:50:08,714 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 356 transitions. Word has length 17 [2021-08-21 18:50:08,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:08,714 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 356 transitions. [2021-08-21 18:50:08,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:08,714 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 356 transitions. [2021-08-21 18:50:08,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 18:50:08,715 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:08,715 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:08,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-21 18:50:08,715 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:08,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:08,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1260745215, now seen corresponding path program 1 times [2021-08-21 18:50:08,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:08,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360647632] [2021-08-21 18:50:08,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:08,729 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:08,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:08,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:50:08,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:08,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360647632] [2021-08-21 18:50:08,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360647632] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:50:08,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:50:08,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 18:50:08,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197666528] [2021-08-21 18:50:08,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:50:08,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:08,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:50:08,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:50:08,809 INFO L87 Difference]: Start difference. First operand 205 states and 356 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:08,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:08,833 INFO L93 Difference]: Finished difference Result 281 states and 480 transitions. [2021-08-21 18:50:08,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:50:08,834 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 18:50:08,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:08,835 INFO L225 Difference]: With dead ends: 281 [2021-08-21 18:50:08,835 INFO L226 Difference]: Without dead ends: 272 [2021-08-21 18:50:08,836 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:50:08,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-08-21 18:50:08,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 218. [2021-08-21 18:50:08,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 1.7557603686635945) internal successors, (381), 217 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:08,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 381 transitions. [2021-08-21 18:50:08,840 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 381 transitions. Word has length 17 [2021-08-21 18:50:08,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:08,840 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 381 transitions. [2021-08-21 18:50:08,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:08,840 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 381 transitions. [2021-08-21 18:50:08,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 18:50:08,841 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:08,841 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:08,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-21 18:50:08,841 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:08,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:08,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1923354035, now seen corresponding path program 1 times [2021-08-21 18:50:08,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:08,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369789781] [2021-08-21 18:50:08,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:08,842 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:08,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:08,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:08,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:08,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369789781] [2021-08-21 18:50:08,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369789781] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:50:08,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:50:08,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:50:08,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257678164] [2021-08-21 18:50:08,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:50:08,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:08,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:50:08,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:50:08,923 INFO L87 Difference]: Start difference. First operand 218 states and 381 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:08,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:08,967 INFO L93 Difference]: Finished difference Result 305 states and 528 transitions. [2021-08-21 18:50:08,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:50:08,967 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 18:50:08,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:08,968 INFO L225 Difference]: With dead ends: 305 [2021-08-21 18:50:08,969 INFO L226 Difference]: Without dead ends: 300 [2021-08-21 18:50:08,969 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.6ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:50:08,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-08-21 18:50:08,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 220. [2021-08-21 18:50:08,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 1.721461187214612) internal successors, (377), 219 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:08,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 377 transitions. [2021-08-21 18:50:08,973 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 377 transitions. Word has length 20 [2021-08-21 18:50:08,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:08,973 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 377 transitions. [2021-08-21 18:50:08,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:08,973 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 377 transitions. [2021-08-21 18:50:08,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 18:50:08,974 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:08,974 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:08,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-21 18:50:08,974 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:08,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:08,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1018563477, now seen corresponding path program 1 times [2021-08-21 18:50:08,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:08,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722109748] [2021-08-21 18:50:08,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:08,975 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:08,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:09,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:09,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:09,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722109748] [2021-08-21 18:50:09,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722109748] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:50:09,049 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:50:09,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:50:09,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155270620] [2021-08-21 18:50:09,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:50:09,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:09,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:50:09,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:50:09,050 INFO L87 Difference]: Start difference. First operand 220 states and 377 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:09,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:09,095 INFO L93 Difference]: Finished difference Result 309 states and 540 transitions. [2021-08-21 18:50:09,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:50:09,096 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 18:50:09,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:09,099 INFO L225 Difference]: With dead ends: 309 [2021-08-21 18:50:09,099 INFO L226 Difference]: Without dead ends: 304 [2021-08-21 18:50:09,100 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.5ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:50:09,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-08-21 18:50:09,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 234. [2021-08-21 18:50:09,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.815450643776824) internal successors, (423), 233 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:09,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 423 transitions. [2021-08-21 18:50:09,111 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 423 transitions. Word has length 20 [2021-08-21 18:50:09,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:09,111 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 423 transitions. [2021-08-21 18:50:09,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:09,111 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 423 transitions. [2021-08-21 18:50:09,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 18:50:09,113 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:09,113 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:09,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-21 18:50:09,113 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:09,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:09,113 INFO L82 PathProgramCache]: Analyzing trace with hash -829340455, now seen corresponding path program 1 times [2021-08-21 18:50:09,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:09,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882037256] [2021-08-21 18:50:09,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:09,116 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:09,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:09,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:09,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:09,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882037256] [2021-08-21 18:50:09,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882037256] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:50:09,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:50:09,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:50:09,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112775325] [2021-08-21 18:50:09,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:50:09,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:09,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:50:09,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:50:09,193 INFO L87 Difference]: Start difference. First operand 234 states and 423 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:09,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:09,226 INFO L93 Difference]: Finished difference Result 323 states and 568 transitions. [2021-08-21 18:50:09,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:50:09,226 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 18:50:09,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:09,227 INFO L225 Difference]: With dead ends: 323 [2021-08-21 18:50:09,227 INFO L226 Difference]: Without dead ends: 314 [2021-08-21 18:50:09,227 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.5ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:50:09,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-08-21 18:50:09,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 238. [2021-08-21 18:50:09,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 1.7932489451476794) internal successors, (425), 237 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:09,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 425 transitions. [2021-08-21 18:50:09,232 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 425 transitions. Word has length 20 [2021-08-21 18:50:09,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:09,232 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 425 transitions. [2021-08-21 18:50:09,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:09,232 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 425 transitions. [2021-08-21 18:50:09,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 18:50:09,233 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:09,233 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:09,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-21 18:50:09,233 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:09,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:09,233 INFO L82 PathProgramCache]: Analyzing trace with hash 2058313937, now seen corresponding path program 2 times [2021-08-21 18:50:09,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:09,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378496156] [2021-08-21 18:50:09,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:09,234 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:09,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:09,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:50:09,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:09,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378496156] [2021-08-21 18:50:09,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378496156] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:09,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451626721] [2021-08-21 18:50:09,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:50:09,275 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:09,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:09,276 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:09,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-21 18:50:09,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:50:09,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:09,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:50:09,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:09,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:50:09,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451626721] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:09,619 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:09,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:50:09,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622305246] [2021-08-21 18:50:09,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:50:09,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:09,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:50:09,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:50:09,620 INFO L87 Difference]: Start difference. First operand 238 states and 425 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:09,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:09,673 INFO L93 Difference]: Finished difference Result 324 states and 573 transitions. [2021-08-21 18:50:09,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:50:09,674 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 18:50:09,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:09,676 INFO L225 Difference]: With dead ends: 324 [2021-08-21 18:50:09,676 INFO L226 Difference]: Without dead ends: 319 [2021-08-21 18:50:09,678 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.7ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:50:09,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-08-21 18:50:09,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 254. [2021-08-21 18:50:09,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 1.8616600790513833) internal successors, (471), 253 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:09,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 471 transitions. [2021-08-21 18:50:09,685 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 471 transitions. Word has length 20 [2021-08-21 18:50:09,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:09,686 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 471 transitions. [2021-08-21 18:50:09,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:09,686 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 471 transitions. [2021-08-21 18:50:09,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 18:50:09,686 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:09,686 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:09,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-21 18:50:09,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:09,905 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:09,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:09,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1829938201, now seen corresponding path program 1 times [2021-08-21 18:50:09,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:09,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665303239] [2021-08-21 18:50:09,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:09,905 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:09,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:09,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:09,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:09,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665303239] [2021-08-21 18:50:09,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665303239] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:50:09,950 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:50:09,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:50:09,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437932944] [2021-08-21 18:50:09,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:50:09,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:09,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:50:09,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:50:09,951 INFO L87 Difference]: Start difference. First operand 254 states and 471 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:10,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:10,003 INFO L93 Difference]: Finished difference Result 370 states and 703 transitions. [2021-08-21 18:50:10,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:50:10,004 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 18:50:10,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:10,005 INFO L225 Difference]: With dead ends: 370 [2021-08-21 18:50:10,005 INFO L226 Difference]: Without dead ends: 365 [2021-08-21 18:50:10,005 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.4ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:50:10,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-08-21 18:50:10,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 284. [2021-08-21 18:50:10,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 1.9681978798586572) internal successors, (557), 283 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:10,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 557 transitions. [2021-08-21 18:50:10,011 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 557 transitions. Word has length 20 [2021-08-21 18:50:10,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:10,011 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 557 transitions. [2021-08-21 18:50:10,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:10,011 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 557 transitions. [2021-08-21 18:50:10,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 18:50:10,012 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:10,012 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:10,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-21 18:50:10,012 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:10,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:10,013 INFO L82 PathProgramCache]: Analyzing trace with hash -17965731, now seen corresponding path program 1 times [2021-08-21 18:50:10,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:10,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890607803] [2021-08-21 18:50:10,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:10,013 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:10,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:10,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:10,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:10,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890607803] [2021-08-21 18:50:10,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890607803] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:50:10,062 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:50:10,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:50:10,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63850816] [2021-08-21 18:50:10,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:50:10,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:10,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:50:10,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:50:10,063 INFO L87 Difference]: Start difference. First operand 284 states and 557 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:10,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:10,099 INFO L93 Difference]: Finished difference Result 405 states and 772 transitions. [2021-08-21 18:50:10,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:50:10,100 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 18:50:10,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:10,101 INFO L225 Difference]: With dead ends: 405 [2021-08-21 18:50:10,101 INFO L226 Difference]: Without dead ends: 396 [2021-08-21 18:50:10,102 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.4ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:50:10,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-08-21 18:50:10,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 313. [2021-08-21 18:50:10,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 1.9775641025641026) internal successors, (617), 312 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:10,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 617 transitions. [2021-08-21 18:50:10,108 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 617 transitions. Word has length 20 [2021-08-21 18:50:10,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:10,109 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 617 transitions. [2021-08-21 18:50:10,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:10,109 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 617 transitions. [2021-08-21 18:50:10,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 18:50:10,109 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:10,110 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:10,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-21 18:50:10,110 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:10,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:10,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1456151753, now seen corresponding path program 2 times [2021-08-21 18:50:10,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:10,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438115412] [2021-08-21 18:50:10,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:10,111 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:10,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:10,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:50:10,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:10,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438115412] [2021-08-21 18:50:10,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438115412] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:10,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689665917] [2021-08-21 18:50:10,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:50:10,185 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:10,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:10,187 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:10,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-21 18:50:10,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:50:10,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:10,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:50:10,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:10,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:50:10,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689665917] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:10,421 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:10,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:50:10,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458939835] [2021-08-21 18:50:10,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:50:10,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:10,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:50:10,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:50:10,422 INFO L87 Difference]: Start difference. First operand 313 states and 617 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:10,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:10,465 INFO L93 Difference]: Finished difference Result 411 states and 785 transitions. [2021-08-21 18:50:10,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:50:10,465 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 18:50:10,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:10,467 INFO L225 Difference]: With dead ends: 411 [2021-08-21 18:50:10,467 INFO L226 Difference]: Without dead ends: 406 [2021-08-21 18:50:10,467 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.8ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:50:10,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-08-21 18:50:10,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 323. [2021-08-21 18:50:10,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.0) internal successors, (644), 322 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:10,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 644 transitions. [2021-08-21 18:50:10,472 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 644 transitions. Word has length 20 [2021-08-21 18:50:10,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:10,472 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 644 transitions. [2021-08-21 18:50:10,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:10,472 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 644 transitions. [2021-08-21 18:50:10,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 18:50:10,473 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:10,473 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:10,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-21 18:50:10,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-08-21 18:50:10,674 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:10,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:10,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1743583155, now seen corresponding path program 2 times [2021-08-21 18:50:10,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:10,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482097600] [2021-08-21 18:50:10,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:10,675 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:10,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:10,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:50:10,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:10,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482097600] [2021-08-21 18:50:10,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482097600] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:10,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88964150] [2021-08-21 18:50:10,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:50:10,731 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:10,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:10,731 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:10,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-21 18:50:10,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:50:10,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:10,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:50:10,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:10,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:50:10,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88964150] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:10,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:10,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:50:10,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206713368] [2021-08-21 18:50:10,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:50:10,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:10,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:50:10,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:50:10,935 INFO L87 Difference]: Start difference. First operand 323 states and 644 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:10,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:10,967 INFO L93 Difference]: Finished difference Result 421 states and 811 transitions. [2021-08-21 18:50:10,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:50:10,968 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 18:50:10,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:10,969 INFO L225 Difference]: With dead ends: 421 [2021-08-21 18:50:10,969 INFO L226 Difference]: Without dead ends: 416 [2021-08-21 18:50:10,969 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.0ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:50:10,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-08-21 18:50:10,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 338. [2021-08-21 18:50:10,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.0148367952522257) internal successors, (679), 337 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:10,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 679 transitions. [2021-08-21 18:50:10,975 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 679 transitions. Word has length 20 [2021-08-21 18:50:10,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:10,975 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 679 transitions. [2021-08-21 18:50:10,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:10,975 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 679 transitions. [2021-08-21 18:50:10,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 18:50:10,976 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:10,976 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:10,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-21 18:50:11,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:11,192 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:11,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:11,193 INFO L82 PathProgramCache]: Analyzing trace with hash -396118827, now seen corresponding path program 2 times [2021-08-21 18:50:11,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:11,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633263475] [2021-08-21 18:50:11,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:11,193 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:11,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:11,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:50:11,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:11,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633263475] [2021-08-21 18:50:11,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633263475] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:11,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459475604] [2021-08-21 18:50:11,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:50:11,246 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:11,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:11,261 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:11,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-21 18:50:11,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:50:11,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:11,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:50:11,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:11,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:50:11,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459475604] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:11,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:11,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:50:11,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521173016] [2021-08-21 18:50:11,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:50:11,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:11,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:50:11,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:50:11,501 INFO L87 Difference]: Start difference. First operand 338 states and 679 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:11,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:11,536 INFO L93 Difference]: Finished difference Result 427 states and 830 transitions. [2021-08-21 18:50:11,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:50:11,537 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 18:50:11,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:11,538 INFO L225 Difference]: With dead ends: 427 [2021-08-21 18:50:11,538 INFO L226 Difference]: Without dead ends: 422 [2021-08-21 18:50:11,538 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.2ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:50:11,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-08-21 18:50:11,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 343. [2021-08-21 18:50:11,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 2.0350877192982457) internal successors, (696), 342 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:11,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 696 transitions. [2021-08-21 18:50:11,544 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 696 transitions. Word has length 20 [2021-08-21 18:50:11,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:11,544 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 696 transitions. [2021-08-21 18:50:11,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:11,544 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 696 transitions. [2021-08-21 18:50:11,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 18:50:11,545 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:11,545 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:11,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-21 18:50:11,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:11,764 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:11,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:11,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1600992559, now seen corresponding path program 2 times [2021-08-21 18:50:11,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:11,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457665414] [2021-08-21 18:50:11,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:11,765 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:11,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:11,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:50:11,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:11,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457665414] [2021-08-21 18:50:11,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457665414] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:11,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515780573] [2021-08-21 18:50:11,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:50:11,807 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:11,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:11,807 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:11,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-21 18:50:11,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:50:11,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:11,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:50:11,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:12,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:50:12,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515780573] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:12,012 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:12,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:50:12,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026516696] [2021-08-21 18:50:12,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:50:12,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:12,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:50:12,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:50:12,013 INFO L87 Difference]: Start difference. First operand 343 states and 696 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:12,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:12,044 INFO L93 Difference]: Finished difference Result 433 states and 849 transitions. [2021-08-21 18:50:12,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:50:12,045 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 18:50:12,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:12,046 INFO L225 Difference]: With dead ends: 433 [2021-08-21 18:50:12,046 INFO L226 Difference]: Without dead ends: 428 [2021-08-21 18:50:12,046 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.8ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:50:12,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-08-21 18:50:12,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 353. [2021-08-21 18:50:12,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 2.059659090909091) internal successors, (725), 352 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:12,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 725 transitions. [2021-08-21 18:50:12,052 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 725 transitions. Word has length 20 [2021-08-21 18:50:12,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:12,052 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 725 transitions. [2021-08-21 18:50:12,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:12,052 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 725 transitions. [2021-08-21 18:50:12,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 18:50:12,053 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:12,053 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:12,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-08-21 18:50:12,269 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,SelfDestructingSolverStorable14 [2021-08-21 18:50:12,269 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:12,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:12,269 INFO L82 PathProgramCache]: Analyzing trace with hash -456007915, now seen corresponding path program 1 times [2021-08-21 18:50:12,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:12,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774560366] [2021-08-21 18:50:12,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:12,270 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:12,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:12,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:12,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:12,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774560366] [2021-08-21 18:50:12,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774560366] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:50:12,338 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:50:12,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:50:12,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423400956] [2021-08-21 18:50:12,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:50:12,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:12,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:50:12,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:50:12,339 INFO L87 Difference]: Start difference. First operand 353 states and 725 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:12,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:12,371 INFO L93 Difference]: Finished difference Result 470 states and 929 transitions. [2021-08-21 18:50:12,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:50:12,371 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 18:50:12,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:12,373 INFO L225 Difference]: With dead ends: 470 [2021-08-21 18:50:12,373 INFO L226 Difference]: Without dead ends: 461 [2021-08-21 18:50:12,373 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.1ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:50:12,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-08-21 18:50:12,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 381. [2021-08-21 18:50:12,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 2.0473684210526315) internal successors, (778), 380 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:12,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 778 transitions. [2021-08-21 18:50:12,380 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 778 transitions. Word has length 20 [2021-08-21 18:50:12,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:12,380 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 778 transitions. [2021-08-21 18:50:12,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:12,380 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 778 transitions. [2021-08-21 18:50:12,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 18:50:12,381 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:12,381 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:12,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-08-21 18:50:12,381 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:12,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:12,382 INFO L82 PathProgramCache]: Analyzing trace with hash -2031474095, now seen corresponding path program 2 times [2021-08-21 18:50:12,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:12,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382848540] [2021-08-21 18:50:12,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:12,382 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:12,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:12,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:50:12,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:12,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382848540] [2021-08-21 18:50:12,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382848540] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:12,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126617356] [2021-08-21 18:50:12,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:50:12,417 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:12,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:12,418 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:12,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-21 18:50:12,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:50:12,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:12,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:50:12,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:12,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:50:12,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126617356] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:12,617 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:12,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:50:12,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021301120] [2021-08-21 18:50:12,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:50:12,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:12,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:50:12,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:50:12,618 INFO L87 Difference]: Start difference. First operand 381 states and 778 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:12,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:12,646 INFO L93 Difference]: Finished difference Result 475 states and 934 transitions. [2021-08-21 18:50:12,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:50:12,646 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 18:50:12,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:12,648 INFO L225 Difference]: With dead ends: 475 [2021-08-21 18:50:12,648 INFO L226 Difference]: Without dead ends: 470 [2021-08-21 18:50:12,648 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.9ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:50:12,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-08-21 18:50:12,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 399. [2021-08-21 18:50:12,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 2.0452261306532664) internal successors, (814), 398 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:12,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 814 transitions. [2021-08-21 18:50:12,654 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 814 transitions. Word has length 20 [2021-08-21 18:50:12,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:12,654 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 814 transitions. [2021-08-21 18:50:12,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:12,654 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 814 transitions. [2021-08-21 18:50:12,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 18:50:12,655 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:12,655 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] [2021-08-21 18:50:12,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-21 18:50:12,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-21 18:50:12,870 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:12,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:12,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1027973567, now seen corresponding path program 1 times [2021-08-21 18:50:12,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:12,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510699576] [2021-08-21 18:50:12,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:12,871 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:12,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:12,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:50:12,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:12,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510699576] [2021-08-21 18:50:12,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510699576] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:50:12,939 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:50:12,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:50:12,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932704552] [2021-08-21 18:50:12,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:50:12,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:12,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:50:12,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:12,940 INFO L87 Difference]: Start difference. First operand 399 states and 814 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:12,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:12,991 INFO L93 Difference]: Finished difference Result 515 states and 987 transitions. [2021-08-21 18:50:12,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:50:12,991 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 18:50:12,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:12,993 INFO L225 Difference]: With dead ends: 515 [2021-08-21 18:50:12,993 INFO L226 Difference]: Without dead ends: 510 [2021-08-21 18:50:12,993 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:12,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-08-21 18:50:12,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 387. [2021-08-21 18:50:12,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 2.0) internal successors, (772), 386 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:13,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 772 transitions. [2021-08-21 18:50:13,000 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 772 transitions. Word has length 23 [2021-08-21 18:50:13,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:13,000 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 772 transitions. [2021-08-21 18:50:13,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:13,000 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 772 transitions. [2021-08-21 18:50:13,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 18:50:13,001 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:13,001 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] [2021-08-21 18:50:13,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-08-21 18:50:13,001 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:13,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:13,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1419089797, now seen corresponding path program 1 times [2021-08-21 18:50:13,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:13,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926500647] [2021-08-21 18:50:13,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:13,002 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:13,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:13,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:50:13,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:13,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926500647] [2021-08-21 18:50:13,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926500647] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:50:13,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:50:13,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:50:13,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567281590] [2021-08-21 18:50:13,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:50:13,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:13,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:50:13,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:13,070 INFO L87 Difference]: Start difference. First operand 387 states and 772 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:13,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:13,112 INFO L93 Difference]: Finished difference Result 524 states and 1010 transitions. [2021-08-21 18:50:13,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:50:13,113 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 18:50:13,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:13,114 INFO L225 Difference]: With dead ends: 524 [2021-08-21 18:50:13,114 INFO L226 Difference]: Without dead ends: 515 [2021-08-21 18:50:13,115 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:13,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-08-21 18:50:13,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 395. [2021-08-21 18:50:13,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.0253807106598987) internal successors, (798), 394 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:13,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 798 transitions. [2021-08-21 18:50:13,121 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 798 transitions. Word has length 23 [2021-08-21 18:50:13,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:13,121 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 798 transitions. [2021-08-21 18:50:13,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:13,121 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 798 transitions. [2021-08-21 18:50:13,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 18:50:13,122 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:13,122 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] [2021-08-21 18:50:13,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-08-21 18:50:13,122 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:13,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:13,122 INFO L82 PathProgramCache]: Analyzing trace with hash -306527627, now seen corresponding path program 2 times [2021-08-21 18:50:13,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:13,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147321805] [2021-08-21 18:50:13,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:13,123 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:13,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:13,190 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:13,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:13,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147321805] [2021-08-21 18:50:13,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147321805] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:13,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702934114] [2021-08-21 18:50:13,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:50:13,191 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:13,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:13,205 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:13,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-21 18:50:13,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:50:13,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:13,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:50:13,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:13,509 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:13,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702934114] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:13,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:13,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:50:13,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260297072] [2021-08-21 18:50:13,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:50:13,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:13,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:50:13,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:13,511 INFO L87 Difference]: Start difference. First operand 395 states and 798 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:13,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:13,561 INFO L93 Difference]: Finished difference Result 514 states and 989 transitions. [2021-08-21 18:50:13,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:50:13,562 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 18:50:13,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:13,563 INFO L225 Difference]: With dead ends: 514 [2021-08-21 18:50:13,563 INFO L226 Difference]: Without dead ends: 509 [2021-08-21 18:50:13,563 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.0ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:13,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-08-21 18:50:13,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 407. [2021-08-21 18:50:13,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.0344827586206895) internal successors, (826), 406 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:13,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 826 transitions. [2021-08-21 18:50:13,570 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 826 transitions. Word has length 23 [2021-08-21 18:50:13,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:13,571 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 826 transitions. [2021-08-21 18:50:13,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:13,571 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 826 transitions. [2021-08-21 18:50:13,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 18:50:13,571 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:13,572 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] [2021-08-21 18:50:13,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-21 18:50:13,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:13,799 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:13,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:13,800 INFO L82 PathProgramCache]: Analyzing trace with hash -163937031, now seen corresponding path program 2 times [2021-08-21 18:50:13,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:13,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758491067] [2021-08-21 18:50:13,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:13,800 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:13,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:13,852 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:13,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:13,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758491067] [2021-08-21 18:50:13,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758491067] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:13,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7940741] [2021-08-21 18:50:13,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:50:13,852 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:13,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:13,853 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:13,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-21 18:50:13,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:50:13,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:14,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:50:14,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:14,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:14,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7940741] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:14,119 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:14,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:50:14,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698652309] [2021-08-21 18:50:14,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:50:14,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:14,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:50:14,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:14,120 INFO L87 Difference]: Start difference. First operand 407 states and 826 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:14,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:14,168 INFO L93 Difference]: Finished difference Result 514 states and 995 transitions. [2021-08-21 18:50:14,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:50:14,168 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 18:50:14,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:14,169 INFO L225 Difference]: With dead ends: 514 [2021-08-21 18:50:14,169 INFO L226 Difference]: Without dead ends: 509 [2021-08-21 18:50:14,170 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:14,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-08-21 18:50:14,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 401. [2021-08-21 18:50:14,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.025) internal successors, (810), 400 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:14,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 810 transitions. [2021-08-21 18:50:14,176 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 810 transitions. Word has length 23 [2021-08-21 18:50:14,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:14,176 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 810 transitions. [2021-08-21 18:50:14,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:14,176 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 810 transitions. [2021-08-21 18:50:14,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 18:50:14,177 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:14,177 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] [2021-08-21 18:50:14,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-21 18:50:14,393 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,SelfDestructingSolverStorable20 [2021-08-21 18:50:14,394 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:14,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:14,395 INFO L82 PathProgramCache]: Analyzing trace with hash 981047613, now seen corresponding path program 1 times [2021-08-21 18:50:14,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:14,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566586693] [2021-08-21 18:50:14,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:14,395 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:14,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:14,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:50:14,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:14,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566586693] [2021-08-21 18:50:14,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566586693] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:50:14,453 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:50:14,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:50:14,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485094564] [2021-08-21 18:50:14,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:50:14,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:14,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:50:14,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:14,454 INFO L87 Difference]: Start difference. First operand 401 states and 810 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:14,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:14,510 INFO L93 Difference]: Finished difference Result 553 states and 1082 transitions. [2021-08-21 18:50:14,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:50:14,511 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 18:50:14,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:14,512 INFO L225 Difference]: With dead ends: 553 [2021-08-21 18:50:14,512 INFO L226 Difference]: Without dead ends: 544 [2021-08-21 18:50:14,513 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.0ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:14,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-08-21 18:50:14,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 428. [2021-08-21 18:50:14,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 2.053864168618267) internal successors, (877), 427 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:14,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 877 transitions. [2021-08-21 18:50:14,519 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 877 transitions. Word has length 23 [2021-08-21 18:50:14,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:14,519 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 877 transitions. [2021-08-21 18:50:14,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:14,520 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 877 transitions. [2021-08-21 18:50:14,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 18:50:14,520 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:14,520 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] [2021-08-21 18:50:14,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-08-21 18:50:14,521 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:14,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:14,521 INFO L82 PathProgramCache]: Analyzing trace with hash -594418567, now seen corresponding path program 2 times [2021-08-21 18:50:14,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:14,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911450408] [2021-08-21 18:50:14,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:14,521 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:14,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:14,567 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:14,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:14,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911450408] [2021-08-21 18:50:14,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911450408] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:14,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803273525] [2021-08-21 18:50:14,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:50:14,568 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:14,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:14,578 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:14,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-21 18:50:14,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:50:14,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:14,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:50:14,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:14,852 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:14,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803273525] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:14,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:14,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:50:14,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721801324] [2021-08-21 18:50:14,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:50:14,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:14,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:50:14,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:14,853 INFO L87 Difference]: Start difference. First operand 428 states and 877 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:14,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:14,898 INFO L93 Difference]: Finished difference Result 538 states and 1053 transitions. [2021-08-21 18:50:14,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:50:14,898 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 18:50:14,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:14,899 INFO L225 Difference]: With dead ends: 538 [2021-08-21 18:50:14,900 INFO L226 Difference]: Without dead ends: 533 [2021-08-21 18:50:14,900 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:14,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-08-21 18:50:14,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 424. [2021-08-21 18:50:14,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 2.028368794326241) internal successors, (858), 423 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:14,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 858 transitions. [2021-08-21 18:50:14,906 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 858 transitions. Word has length 23 [2021-08-21 18:50:14,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:14,906 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 858 transitions. [2021-08-21 18:50:14,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:14,906 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 858 transitions. [2021-08-21 18:50:14,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 18:50:14,907 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:14,907 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:14,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-21 18:50:15,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:15,125 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:15,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:15,125 INFO L82 PathProgramCache]: Analyzing trace with hash -211150859, now seen corresponding path program 3 times [2021-08-21 18:50:15,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:15,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450232298] [2021-08-21 18:50:15,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:15,126 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:15,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:15,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:15,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:15,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450232298] [2021-08-21 18:50:15,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450232298] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:15,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916511782] [2021-08-21 18:50:15,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:50:15,188 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:15,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:15,205 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:15,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-21 18:50:15,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:50:15,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:15,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:50:15,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:15,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:15,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916511782] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:15,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:15,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:50:15,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873667820] [2021-08-21 18:50:15,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:50:15,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:15,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:50:15,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:15,535 INFO L87 Difference]: Start difference. First operand 424 states and 858 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:15,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:15,596 INFO L93 Difference]: Finished difference Result 548 states and 1060 transitions. [2021-08-21 18:50:15,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:50:15,597 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 18:50:15,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:15,599 INFO L225 Difference]: With dead ends: 548 [2021-08-21 18:50:15,599 INFO L226 Difference]: Without dead ends: 543 [2021-08-21 18:50:15,599 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:15,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-08-21 18:50:15,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 430. [2021-08-21 18:50:15,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 2.0489510489510487) internal successors, (879), 429 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:15,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 879 transitions. [2021-08-21 18:50:15,605 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 879 transitions. Word has length 23 [2021-08-21 18:50:15,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:15,605 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 879 transitions. [2021-08-21 18:50:15,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:15,606 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 879 transitions. [2021-08-21 18:50:15,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 18:50:15,606 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:15,606 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] [2021-08-21 18:50:15,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-21 18:50:15,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-21 18:50:15,823 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:15,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:15,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1564200643, now seen corresponding path program 3 times [2021-08-21 18:50:15,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:15,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136095990] [2021-08-21 18:50:15,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:15,823 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:15,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:15,871 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:15,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:15,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136095990] [2021-08-21 18:50:15,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136095990] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:15,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228623024] [2021-08-21 18:50:15,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:50:15,871 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:15,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:15,872 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:15,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-21 18:50:16,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:50:16,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:16,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:50:16,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:16,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:16,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228623024] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:16,210 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:16,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:50:16,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10598901] [2021-08-21 18:50:16,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:50:16,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:16,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:50:16,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:16,211 INFO L87 Difference]: Start difference. First operand 430 states and 879 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:16,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:16,283 INFO L93 Difference]: Finished difference Result 565 states and 1117 transitions. [2021-08-21 18:50:16,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:50:16,284 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 18:50:16,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:16,286 INFO L225 Difference]: With dead ends: 565 [2021-08-21 18:50:16,286 INFO L226 Difference]: Without dead ends: 560 [2021-08-21 18:50:16,286 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:16,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-08-21 18:50:16,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 458. [2021-08-21 18:50:16,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 2.1006564551422318) internal successors, (960), 457 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:16,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 960 transitions. [2021-08-21 18:50:16,304 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 960 transitions. Word has length 23 [2021-08-21 18:50:16,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:16,304 INFO L470 AbstractCegarLoop]: Abstraction has 458 states and 960 transitions. [2021-08-21 18:50:16,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:16,305 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 960 transitions. [2021-08-21 18:50:16,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 18:50:16,305 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:16,305 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] [2021-08-21 18:50:16,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-21 18:50:16,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-08-21 18:50:16,506 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:16,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:16,506 INFO L82 PathProgramCache]: Analyzing trace with hash 882862721, now seen corresponding path program 3 times [2021-08-21 18:50:16,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:16,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538374189] [2021-08-21 18:50:16,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:16,507 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:16,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:16,588 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:16,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:16,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538374189] [2021-08-21 18:50:16,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538374189] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:16,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541007206] [2021-08-21 18:50:16,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:50:16,589 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:16,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:16,590 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:16,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-21 18:50:16,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:50:16,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:16,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:50:16,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:16,996 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:16,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541007206] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:16,996 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:16,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:50:16,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193570172] [2021-08-21 18:50:16,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:50:16,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:16,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:50:16,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:16,997 INFO L87 Difference]: Start difference. First operand 458 states and 960 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:17,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:17,044 INFO L93 Difference]: Finished difference Result 600 states and 1192 transitions. [2021-08-21 18:50:17,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:50:17,045 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 18:50:17,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:17,048 INFO L225 Difference]: With dead ends: 600 [2021-08-21 18:50:17,048 INFO L226 Difference]: Without dead ends: 591 [2021-08-21 18:50:17,048 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.1ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:17,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-08-21 18:50:17,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 479. [2021-08-21 18:50:17,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 2.1066945606694563) internal successors, (1007), 478 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:17,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1007 transitions. [2021-08-21 18:50:17,062 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1007 transitions. Word has length 23 [2021-08-21 18:50:17,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:17,063 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 1007 transitions. [2021-08-21 18:50:17,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:17,063 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1007 transitions. [2021-08-21 18:50:17,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 18:50:17,065 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:17,065 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] [2021-08-21 18:50:17,085 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-08-21 18:50:17,284 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,SelfDestructingSolverStorable25 [2021-08-21 18:50:17,284 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:17,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:17,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1813299219, now seen corresponding path program 4 times [2021-08-21 18:50:17,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:17,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524989993] [2021-08-21 18:50:17,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:17,285 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:17,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:17,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:17,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:17,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524989993] [2021-08-21 18:50:17,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524989993] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:17,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414325470] [2021-08-21 18:50:17,341 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:50:17,341 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:17,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:17,342 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:17,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-21 18:50:17,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:50:17,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:17,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:50:17,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:17,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:17,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414325470] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:17,746 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:17,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:50:17,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161841281] [2021-08-21 18:50:17,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:50:17,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:17,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:50:17,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:17,747 INFO L87 Difference]: Start difference. First operand 479 states and 1007 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:17,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:17,790 INFO L93 Difference]: Finished difference Result 608 states and 1217 transitions. [2021-08-21 18:50:17,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:50:17,791 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 18:50:17,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:17,793 INFO L225 Difference]: With dead ends: 608 [2021-08-21 18:50:17,793 INFO L226 Difference]: Without dead ends: 603 [2021-08-21 18:50:17,793 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.1ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:17,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2021-08-21 18:50:17,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 487. [2021-08-21 18:50:17,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 2.1131687242798356) internal successors, (1027), 486 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:17,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1027 transitions. [2021-08-21 18:50:17,802 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1027 transitions. Word has length 23 [2021-08-21 18:50:17,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:17,802 INFO L470 AbstractCegarLoop]: Abstraction has 487 states and 1027 transitions. [2021-08-21 18:50:17,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:17,802 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1027 transitions. [2021-08-21 18:50:17,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 18:50:17,803 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:17,803 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] [2021-08-21 18:50:17,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-21 18:50:18,017 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,SelfDestructingSolverStorable26 [2021-08-21 18:50:18,017 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:18,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:18,017 INFO L82 PathProgramCache]: Analyzing trace with hash 629397497, now seen corresponding path program 4 times [2021-08-21 18:50:18,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:18,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768572640] [2021-08-21 18:50:18,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:18,017 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:18,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:18,071 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:18,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:18,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768572640] [2021-08-21 18:50:18,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768572640] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:18,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279295268] [2021-08-21 18:50:18,071 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:50:18,071 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:18,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:18,072 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:18,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-21 18:50:18,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:50:18,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:18,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:50:18,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:18,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:18,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279295268] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:18,401 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:18,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:50:18,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583789986] [2021-08-21 18:50:18,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:50:18,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:18,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:50:18,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:18,402 INFO L87 Difference]: Start difference. First operand 487 states and 1027 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:18,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:18,444 INFO L93 Difference]: Finished difference Result 599 states and 1206 transitions. [2021-08-21 18:50:18,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:50:18,444 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 18:50:18,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:18,446 INFO L225 Difference]: With dead ends: 599 [2021-08-21 18:50:18,446 INFO L226 Difference]: Without dead ends: 594 [2021-08-21 18:50:18,446 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:18,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-08-21 18:50:18,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 490. [2021-08-21 18:50:18,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 2.1165644171779143) internal successors, (1035), 489 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:18,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1035 transitions. [2021-08-21 18:50:18,453 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1035 transitions. Word has length 23 [2021-08-21 18:50:18,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:18,453 INFO L470 AbstractCegarLoop]: Abstraction has 490 states and 1035 transitions. [2021-08-21 18:50:18,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:18,453 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1035 transitions. [2021-08-21 18:50:18,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 18:50:18,454 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:18,454 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] [2021-08-21 18:50:18,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-21 18:50:18,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:18,671 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:18,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:18,671 INFO L82 PathProgramCache]: Analyzing trace with hash 569508409, now seen corresponding path program 1 times [2021-08-21 18:50:18,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:18,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396725891] [2021-08-21 18:50:18,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:18,671 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:18,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:18,716 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:50:18,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:18,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396725891] [2021-08-21 18:50:18,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396725891] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:50:18,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:50:18,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:50:18,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473549524] [2021-08-21 18:50:18,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:50:18,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:18,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:50:18,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:18,717 INFO L87 Difference]: Start difference. First operand 490 states and 1035 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:18,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:18,758 INFO L93 Difference]: Finished difference Result 727 states and 1492 transitions. [2021-08-21 18:50:18,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:50:18,758 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 18:50:18,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:18,761 INFO L225 Difference]: With dead ends: 727 [2021-08-21 18:50:18,761 INFO L226 Difference]: Without dead ends: 718 [2021-08-21 18:50:18,762 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:18,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2021-08-21 18:50:18,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 576. [2021-08-21 18:50:18,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 575 states have (on average 2.1339130434782607) internal successors, (1227), 575 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:18,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 1227 transitions. [2021-08-21 18:50:18,770 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 1227 transitions. Word has length 23 [2021-08-21 18:50:18,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:18,770 INFO L470 AbstractCegarLoop]: Abstraction has 576 states and 1227 transitions. [2021-08-21 18:50:18,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:18,770 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 1227 transitions. [2021-08-21 18:50:18,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 18:50:18,771 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:18,771 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] [2021-08-21 18:50:18,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-08-21 18:50:18,771 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:18,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:18,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1005957771, now seen corresponding path program 2 times [2021-08-21 18:50:18,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:18,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716500930] [2021-08-21 18:50:18,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:18,772 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:18,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:18,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:18,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:18,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716500930] [2021-08-21 18:50:18,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716500930] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:18,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59007510] [2021-08-21 18:50:18,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:50:18,818 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:18,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:18,819 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:18,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-21 18:50:19,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:50:19,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:19,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:50:19,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:19,176 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:19,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59007510] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:19,177 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:19,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:50:19,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990835284] [2021-08-21 18:50:19,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:50:19,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:19,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:50:19,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:19,178 INFO L87 Difference]: Start difference. First operand 576 states and 1227 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:19,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:19,220 INFO L93 Difference]: Finished difference Result 734 states and 1500 transitions. [2021-08-21 18:50:19,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:50:19,221 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 18:50:19,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:19,223 INFO L225 Difference]: With dead ends: 734 [2021-08-21 18:50:19,223 INFO L226 Difference]: Without dead ends: 729 [2021-08-21 18:50:19,223 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.1ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:19,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2021-08-21 18:50:19,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 606. [2021-08-21 18:50:19,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 605 states have (on average 2.1305785123966943) internal successors, (1289), 605 states have internal predecessors, (1289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:19,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 1289 transitions. [2021-08-21 18:50:19,232 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 1289 transitions. Word has length 23 [2021-08-21 18:50:19,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:19,232 INFO L470 AbstractCegarLoop]: Abstraction has 606 states and 1289 transitions. [2021-08-21 18:50:19,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:19,232 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 1289 transitions. [2021-08-21 18:50:19,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 18:50:19,233 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:19,233 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] [2021-08-21 18:50:19,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-21 18:50:19,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:19,450 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:19,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:19,450 INFO L82 PathProgramCache]: Analyzing trace with hash -62959735, now seen corresponding path program 5 times [2021-08-21 18:50:19,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:19,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498188313] [2021-08-21 18:50:19,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:19,451 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:19,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:19,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:50:19,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:19,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498188313] [2021-08-21 18:50:19,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498188313] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:19,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516173344] [2021-08-21 18:50:19,500 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:50:19,500 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:19,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:19,500 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:19,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-21 18:50:19,760 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:50:19,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:19,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:50:19,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:19,882 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:50:19,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516173344] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:19,883 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:19,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:50:19,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234528990] [2021-08-21 18:50:19,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:50:19,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:19,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:50:19,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:19,884 INFO L87 Difference]: Start difference. First operand 606 states and 1289 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:19,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:19,933 INFO L93 Difference]: Finished difference Result 759 states and 1558 transitions. [2021-08-21 18:50:19,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:50:19,934 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 18:50:19,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:19,936 INFO L225 Difference]: With dead ends: 759 [2021-08-21 18:50:19,936 INFO L226 Difference]: Without dead ends: 754 [2021-08-21 18:50:19,936 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:19,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2021-08-21 18:50:19,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 635. [2021-08-21 18:50:19,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 634 states have (on average 2.1466876971608833) internal successors, (1361), 634 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:19,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 1361 transitions. [2021-08-21 18:50:19,945 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 1361 transitions. Word has length 23 [2021-08-21 18:50:19,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:19,945 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 1361 transitions. [2021-08-21 18:50:19,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:19,946 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 1361 transitions. [2021-08-21 18:50:19,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 18:50:19,947 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:19,947 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] [2021-08-21 18:50:19,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-21 18:50:20,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:20,164 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:20,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:20,165 INFO L82 PathProgramCache]: Analyzing trace with hash 842650005, now seen corresponding path program 6 times [2021-08-21 18:50:20,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:20,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468718936] [2021-08-21 18:50:20,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:20,165 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:20,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:20,216 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:50:20,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:20,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468718936] [2021-08-21 18:50:20,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468718936] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:20,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575476248] [2021-08-21 18:50:20,217 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:50:20,217 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:20,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:20,218 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:20,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-21 18:50:20,474 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:50:20,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:20,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:50:20,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:20,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:50:20,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575476248] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:20,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:20,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:50:20,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713729417] [2021-08-21 18:50:20,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:50:20,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:20,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:50:20,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:20,587 INFO L87 Difference]: Start difference. First operand 635 states and 1361 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:20,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:20,637 INFO L93 Difference]: Finished difference Result 774 states and 1588 transitions. [2021-08-21 18:50:20,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:50:20,637 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 18:50:20,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:20,640 INFO L225 Difference]: With dead ends: 774 [2021-08-21 18:50:20,640 INFO L226 Difference]: Without dead ends: 769 [2021-08-21 18:50:20,640 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.1ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:20,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2021-08-21 18:50:20,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 649. [2021-08-21 18:50:20,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 648 states have (on average 2.1574074074074074) internal successors, (1398), 648 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:20,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 1398 transitions. [2021-08-21 18:50:20,648 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 1398 transitions. Word has length 23 [2021-08-21 18:50:20,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:20,648 INFO L470 AbstractCegarLoop]: Abstraction has 649 states and 1398 transitions. [2021-08-21 18:50:20,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:20,648 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 1398 transitions. [2021-08-21 18:50:20,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 18:50:20,649 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:20,649 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] [2021-08-21 18:50:20,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-21 18:50:20,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:20,888 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:20,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:20,888 INFO L82 PathProgramCache]: Analyzing trace with hash -499428795, now seen corresponding path program 3 times [2021-08-21 18:50:20,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:20,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128756801] [2021-08-21 18:50:20,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:20,888 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:20,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:20,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:20,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:20,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128756801] [2021-08-21 18:50:20,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128756801] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:20,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652078099] [2021-08-21 18:50:20,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:50:20,956 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:20,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:20,985 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:21,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-21 18:50:21,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:50:21,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:21,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:50:21,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:21,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:21,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652078099] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:21,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:21,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:50:21,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140483630] [2021-08-21 18:50:21,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:50:21,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:21,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:50:21,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:21,463 INFO L87 Difference]: Start difference. First operand 649 states and 1398 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:21,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:21,533 INFO L93 Difference]: Finished difference Result 805 states and 1659 transitions. [2021-08-21 18:50:21,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:50:21,534 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 18:50:21,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:21,536 INFO L225 Difference]: With dead ends: 805 [2021-08-21 18:50:21,536 INFO L226 Difference]: Without dead ends: 800 [2021-08-21 18:50:21,537 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:21,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2021-08-21 18:50:21,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 659. [2021-08-21 18:50:21,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 658 states have (on average 2.1656534954407296) internal successors, (1425), 658 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:21,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 1425 transitions. [2021-08-21 18:50:21,547 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 1425 transitions. Word has length 23 [2021-08-21 18:50:21,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:21,547 INFO L470 AbstractCegarLoop]: Abstraction has 659 states and 1425 transitions. [2021-08-21 18:50:21,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:21,547 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 1425 transitions. [2021-08-21 18:50:21,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 18:50:21,548 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:21,548 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:21,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-21 18:50:21,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:21,749 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:21,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:21,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1947634569, now seen corresponding path program 3 times [2021-08-21 18:50:21,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:21,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639398141] [2021-08-21 18:50:21,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:21,750 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:21,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:21,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:21,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:21,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639398141] [2021-08-21 18:50:21,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639398141] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:21,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683220134] [2021-08-21 18:50:21,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:50:21,796 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:21,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:21,798 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:21,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-21 18:50:22,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:50:22,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:22,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:50:22,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:22,223 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:22,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683220134] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:22,223 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:22,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:50:22,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700998885] [2021-08-21 18:50:22,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:50:22,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:22,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:50:22,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:22,224 INFO L87 Difference]: Start difference. First operand 659 states and 1425 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:22,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:22,260 INFO L93 Difference]: Finished difference Result 841 states and 1726 transitions. [2021-08-21 18:50:22,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:50:22,260 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 18:50:22,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:22,262 INFO L225 Difference]: With dead ends: 841 [2021-08-21 18:50:22,262 INFO L226 Difference]: Without dead ends: 832 [2021-08-21 18:50:22,262 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:22,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2021-08-21 18:50:22,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 676. [2021-08-21 18:50:22,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 675 states have (on average 2.157037037037037) internal successors, (1456), 675 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:22,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 1456 transitions. [2021-08-21 18:50:22,271 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 1456 transitions. Word has length 23 [2021-08-21 18:50:22,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:22,271 INFO L470 AbstractCegarLoop]: Abstraction has 676 states and 1456 transitions. [2021-08-21 18:50:22,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:22,271 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 1456 transitions. [2021-08-21 18:50:22,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 18:50:22,272 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:22,272 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] [2021-08-21 18:50:22,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-21 18:50:22,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:22,490 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:22,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:22,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1297905599, now seen corresponding path program 3 times [2021-08-21 18:50:22,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:22,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702709852] [2021-08-21 18:50:22,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:22,490 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:22,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:22,544 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:22,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:22,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702709852] [2021-08-21 18:50:22,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702709852] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:22,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632751905] [2021-08-21 18:50:22,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:50:22,544 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:22,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:22,561 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:22,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-21 18:50:22,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:50:22,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:22,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:50:22,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:22,998 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:22,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632751905] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:22,999 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:22,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:50:22,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021663856] [2021-08-21 18:50:22,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:50:22,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:22,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:50:22,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:22,999 INFO L87 Difference]: Start difference. First operand 676 states and 1456 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:23,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:23,040 INFO L93 Difference]: Finished difference Result 835 states and 1729 transitions. [2021-08-21 18:50:23,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:50:23,040 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 18:50:23,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:23,042 INFO L225 Difference]: With dead ends: 835 [2021-08-21 18:50:23,042 INFO L226 Difference]: Without dead ends: 830 [2021-08-21 18:50:23,042 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.0ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:23,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-08-21 18:50:23,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 704. [2021-08-21 18:50:23,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 703 states have (on average 2.1621621621621623) internal successors, (1520), 703 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:23,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 1520 transitions. [2021-08-21 18:50:23,051 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 1520 transitions. Word has length 23 [2021-08-21 18:50:23,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:23,051 INFO L470 AbstractCegarLoop]: Abstraction has 704 states and 1520 transitions. [2021-08-21 18:50:23,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:23,051 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 1520 transitions. [2021-08-21 18:50:23,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 18:50:23,052 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:23,052 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:23,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-21 18:50:23,269 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,SelfDestructingSolverStorable34 [2021-08-21 18:50:23,269 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:23,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:23,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1149157765, now seen corresponding path program 3 times [2021-08-21 18:50:23,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:23,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847091990] [2021-08-21 18:50:23,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:23,270 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:23,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:23,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:23,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:23,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847091990] [2021-08-21 18:50:23,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847091990] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:23,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380903736] [2021-08-21 18:50:23,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:50:23,315 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:23,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:23,315 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:23,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-21 18:50:23,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:50:23,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:23,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:50:23,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:23,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:23,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380903736] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:23,825 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:23,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:50:23,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018310005] [2021-08-21 18:50:23,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:50:23,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:23,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:50:23,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:23,826 INFO L87 Difference]: Start difference. First operand 704 states and 1520 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:23,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:23,861 INFO L93 Difference]: Finished difference Result 888 states and 1834 transitions. [2021-08-21 18:50:23,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:50:23,861 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 18:50:23,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:23,863 INFO L225 Difference]: With dead ends: 888 [2021-08-21 18:50:23,863 INFO L226 Difference]: Without dead ends: 879 [2021-08-21 18:50:23,864 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:23,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2021-08-21 18:50:23,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 743. [2021-08-21 18:50:23,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 2.146900269541779) internal successors, (1593), 742 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:23,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1593 transitions. [2021-08-21 18:50:23,877 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1593 transitions. Word has length 23 [2021-08-21 18:50:23,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:23,877 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 1593 transitions. [2021-08-21 18:50:23,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:23,877 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1593 transitions. [2021-08-21 18:50:23,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 18:50:23,882 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:23,882 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] [2021-08-21 18:50:23,899 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-08-21 18:50:24,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-21 18:50:24,099 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:24,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:24,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1717510335, now seen corresponding path program 5 times [2021-08-21 18:50:24,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:24,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657250187] [2021-08-21 18:50:24,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:24,100 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:24,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:24,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:50:24,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:24,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657250187] [2021-08-21 18:50:24,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657250187] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:24,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31573431] [2021-08-21 18:50:24,165 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:50:24,165 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:24,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:24,166 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:24,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-21 18:50:24,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:50:24,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:24,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:50:24,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:24,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:50:24,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31573431] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:24,722 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:24,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:50:24,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392221993] [2021-08-21 18:50:24,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:50:24,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:24,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:50:24,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:24,723 INFO L87 Difference]: Start difference. First operand 743 states and 1593 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:24,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:24,784 INFO L93 Difference]: Finished difference Result 883 states and 1835 transitions. [2021-08-21 18:50:24,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:50:24,785 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 18:50:24,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:24,788 INFO L225 Difference]: With dead ends: 883 [2021-08-21 18:50:24,788 INFO L226 Difference]: Without dead ends: 878 [2021-08-21 18:50:24,788 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.0ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:24,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-08-21 18:50:24,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 757. [2021-08-21 18:50:24,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 756 states have (on average 2.1653439153439153) internal successors, (1637), 756 states have internal predecessors, (1637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:24,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 1637 transitions. [2021-08-21 18:50:24,799 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 1637 transitions. Word has length 23 [2021-08-21 18:50:24,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:24,799 INFO L470 AbstractCegarLoop]: Abstraction has 757 states and 1637 transitions. [2021-08-21 18:50:24,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:24,799 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 1637 transitions. [2021-08-21 18:50:24,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 18:50:24,800 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:24,800 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] [2021-08-21 18:50:24,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-21 18:50:25,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-21 18:50:25,017 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:25,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:25,018 INFO L82 PathProgramCache]: Analyzing trace with hash 212045885, now seen corresponding path program 6 times [2021-08-21 18:50:25,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:25,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413013341] [2021-08-21 18:50:25,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:25,018 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:25,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:25,069 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:50:25,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:25,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413013341] [2021-08-21 18:50:25,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413013341] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:25,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482026917] [2021-08-21 18:50:25,070 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:50:25,070 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:25,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:25,071 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:25,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-21 18:50:25,449 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:50:25,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:25,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:50:25,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:25,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:50:25,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482026917] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:25,561 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:25,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:50:25,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349564505] [2021-08-21 18:50:25,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:50:25,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:25,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:50:25,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:25,562 INFO L87 Difference]: Start difference. First operand 757 states and 1637 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:25,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:25,626 INFO L93 Difference]: Finished difference Result 888 states and 1851 transitions. [2021-08-21 18:50:25,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:50:25,626 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 18:50:25,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:25,628 INFO L225 Difference]: With dead ends: 888 [2021-08-21 18:50:25,628 INFO L226 Difference]: Without dead ends: 883 [2021-08-21 18:50:25,628 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:25,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2021-08-21 18:50:25,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 764. [2021-08-21 18:50:25,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 2.1756225425950197) internal successors, (1660), 763 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:25,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 1660 transitions. [2021-08-21 18:50:25,637 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 1660 transitions. Word has length 23 [2021-08-21 18:50:25,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:25,637 INFO L470 AbstractCegarLoop]: Abstraction has 764 states and 1660 transitions. [2021-08-21 18:50:25,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:25,637 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 1660 transitions. [2021-08-21 18:50:25,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 18:50:25,639 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:25,639 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:25,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-21 18:50:25,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:25,857 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:25,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:25,857 INFO L82 PathProgramCache]: Analyzing trace with hash 247541433, now seen corresponding path program 3 times [2021-08-21 18:50:25,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:25,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619765885] [2021-08-21 18:50:25,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:25,857 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:25,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:25,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:25,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:25,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619765885] [2021-08-21 18:50:25,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619765885] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:25,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322543893] [2021-08-21 18:50:25,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:50:25,914 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:25,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:25,915 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:25,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-21 18:50:26,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:50:26,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:26,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:50:26,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:26,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:26,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322543893] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:26,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:26,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:50:26,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111414050] [2021-08-21 18:50:26,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:50:26,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:26,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:50:26,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:26,473 INFO L87 Difference]: Start difference. First operand 764 states and 1660 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:26,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:26,518 INFO L93 Difference]: Finished difference Result 917 states and 1918 transitions. [2021-08-21 18:50:26,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:50:26,518 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 18:50:26,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:26,521 INFO L225 Difference]: With dead ends: 917 [2021-08-21 18:50:26,521 INFO L226 Difference]: Without dead ends: 912 [2021-08-21 18:50:26,521 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:26,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2021-08-21 18:50:26,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 774. [2021-08-21 18:50:26,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 2.184993531694696) internal successors, (1689), 773 states have internal predecessors, (1689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:26,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 1689 transitions. [2021-08-21 18:50:26,532 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 1689 transitions. Word has length 23 [2021-08-21 18:50:26,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:26,532 INFO L470 AbstractCegarLoop]: Abstraction has 774 states and 1689 transitions. [2021-08-21 18:50:26,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:26,532 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 1689 transitions. [2021-08-21 18:50:26,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 18:50:26,534 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:26,534 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] [2021-08-21 18:50:26,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-21 18:50:26,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-21 18:50:26,753 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:26,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:26,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1600362499, now seen corresponding path program 4 times [2021-08-21 18:50:26,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:26,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576317278] [2021-08-21 18:50:26,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:26,754 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:26,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:26,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:26,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:26,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576317278] [2021-08-21 18:50:26,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576317278] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:26,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712205521] [2021-08-21 18:50:26,807 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:50:26,807 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:26,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:26,821 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:26,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-21 18:50:27,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:50:27,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:27,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:50:27,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:27,354 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:27,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712205521] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:27,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:27,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:50:27,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380803390] [2021-08-21 18:50:27,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:50:27,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:27,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:50:27,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:27,355 INFO L87 Difference]: Start difference. First operand 774 states and 1689 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:27,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:27,400 INFO L93 Difference]: Finished difference Result 939 states and 1963 transitions. [2021-08-21 18:50:27,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:50:27,401 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 18:50:27,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:27,403 INFO L225 Difference]: With dead ends: 939 [2021-08-21 18:50:27,403 INFO L226 Difference]: Without dead ends: 930 [2021-08-21 18:50:27,403 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:27,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-08-21 18:50:27,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 782. [2021-08-21 18:50:27,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 781 states have (on average 2.18437900128041) internal successors, (1706), 781 states have internal predecessors, (1706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:27,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 1706 transitions. [2021-08-21 18:50:27,414 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 1706 transitions. Word has length 23 [2021-08-21 18:50:27,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:27,414 INFO L470 AbstractCegarLoop]: Abstraction has 782 states and 1706 transitions. [2021-08-21 18:50:27,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:27,414 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 1706 transitions. [2021-08-21 18:50:27,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 18:50:27,415 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:27,415 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] [2021-08-21 18:50:27,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-21 18:50:27,633 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,SelfDestructingSolverStorable39 [2021-08-21 18:50:27,634 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:27,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:27,634 INFO L82 PathProgramCache]: Analyzing trace with hash 993173697, now seen corresponding path program 5 times [2021-08-21 18:50:27,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:27,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124711124] [2021-08-21 18:50:27,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:27,634 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:27,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:27,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:50:27,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:27,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124711124] [2021-08-21 18:50:27,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124711124] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:27,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327053703] [2021-08-21 18:50:27,688 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:50:27,688 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:27,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:27,689 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:27,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-21 18:50:28,124 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:50:28,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:28,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:50:28,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:28,254 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:50:28,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327053703] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:28,254 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:28,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:50:28,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040875957] [2021-08-21 18:50:28,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:50:28,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:28,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:50:28,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:28,255 INFO L87 Difference]: Start difference. First operand 782 states and 1706 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:28,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:28,302 INFO L93 Difference]: Finished difference Result 920 states and 1938 transitions. [2021-08-21 18:50:28,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:50:28,303 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 18:50:28,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:28,304 INFO L225 Difference]: With dead ends: 920 [2021-08-21 18:50:28,304 INFO L226 Difference]: Without dead ends: 915 [2021-08-21 18:50:28,305 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:28,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2021-08-21 18:50:28,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 791. [2021-08-21 18:50:28,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 2.1860759493670887) internal successors, (1727), 790 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:28,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 1727 transitions. [2021-08-21 18:50:28,314 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 1727 transitions. Word has length 23 [2021-08-21 18:50:28,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:28,314 INFO L470 AbstractCegarLoop]: Abstraction has 791 states and 1727 transitions. [2021-08-21 18:50:28,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:28,314 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 1727 transitions. [2021-08-21 18:50:28,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 18:50:28,315 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:28,315 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] [2021-08-21 18:50:28,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-21 18:50:28,531 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,SelfDestructingSolverStorable40 [2021-08-21 18:50:28,531 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:28,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:28,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1372237379, now seen corresponding path program 6 times [2021-08-21 18:50:28,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:28,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96771220] [2021-08-21 18:50:28,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:28,532 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:28,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:28,581 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:50:28,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:28,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96771220] [2021-08-21 18:50:28,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96771220] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:28,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715143624] [2021-08-21 18:50:28,582 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:50:28,582 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:28,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:28,582 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:28,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-21 18:50:29,063 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:50:29,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:29,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:50:29,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:29,188 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:50:29,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715143624] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:29,188 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:29,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:50:29,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785012802] [2021-08-21 18:50:29,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:50:29,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:29,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:50:29,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:29,189 INFO L87 Difference]: Start difference. First operand 791 states and 1727 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:29,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:29,237 INFO L93 Difference]: Finished difference Result 915 states and 1934 transitions. [2021-08-21 18:50:29,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:50:29,237 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 18:50:29,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:29,239 INFO L225 Difference]: With dead ends: 915 [2021-08-21 18:50:29,239 INFO L226 Difference]: Without dead ends: 910 [2021-08-21 18:50:29,239 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:29,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2021-08-21 18:50:29,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 798. [2021-08-21 18:50:29,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 797 states have (on average 2.190715181932246) internal successors, (1746), 797 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:29,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 1746 transitions. [2021-08-21 18:50:29,249 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 1746 transitions. Word has length 23 [2021-08-21 18:50:29,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:29,249 INFO L470 AbstractCegarLoop]: Abstraction has 798 states and 1746 transitions. [2021-08-21 18:50:29,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:29,249 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 1746 transitions. [2021-08-21 18:50:29,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 18:50:29,250 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:29,250 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:29,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-21 18:50:29,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:29,465 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:29,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:29,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1104115907, now seen corresponding path program 3 times [2021-08-21 18:50:29,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:29,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423304481] [2021-08-21 18:50:29,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:29,466 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:29,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:29,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:29,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:29,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423304481] [2021-08-21 18:50:29,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423304481] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:29,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124140361] [2021-08-21 18:50:29,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:50:29,530 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:29,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:29,531 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:29,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-21 18:50:29,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:50:29,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:29,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:50:29,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:30,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:30,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124140361] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:30,122 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:30,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:50:30,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907682703] [2021-08-21 18:50:30,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:50:30,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:30,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:50:30,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:30,125 INFO L87 Difference]: Start difference. First operand 798 states and 1746 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:30,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:30,166 INFO L93 Difference]: Finished difference Result 949 states and 2008 transitions. [2021-08-21 18:50:30,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:50:30,166 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 18:50:30,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:30,168 INFO L225 Difference]: With dead ends: 949 [2021-08-21 18:50:30,168 INFO L226 Difference]: Without dead ends: 944 [2021-08-21 18:50:30,169 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.1ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:30,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2021-08-21 18:50:30,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 821. [2021-08-21 18:50:30,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 2.202439024390244) internal successors, (1806), 820 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:30,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1806 transitions. [2021-08-21 18:50:30,213 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1806 transitions. Word has length 23 [2021-08-21 18:50:30,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:30,214 INFO L470 AbstractCegarLoop]: Abstraction has 821 states and 1806 transitions. [2021-08-21 18:50:30,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:30,214 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1806 transitions. [2021-08-21 18:50:30,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 18:50:30,216 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:30,216 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] [2021-08-21 18:50:30,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-21 18:50:30,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:30,436 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:30,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:30,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1342947457, now seen corresponding path program 4 times [2021-08-21 18:50:30,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:30,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523381038] [2021-08-21 18:50:30,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:30,436 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:30,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:30,501 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:30,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:30,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523381038] [2021-08-21 18:50:30,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523381038] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:30,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910900977] [2021-08-21 18:50:30,501 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:50:30,502 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:30,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:30,502 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:30,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-21 18:50:30,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:50:30,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:30,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:50:30,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:31,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:31,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910900977] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:31,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:31,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:50:31,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469347557] [2021-08-21 18:50:31,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:50:31,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:31,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:50:31,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:31,106 INFO L87 Difference]: Start difference. First operand 821 states and 1806 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:31,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:31,163 INFO L93 Difference]: Finished difference Result 981 states and 2080 transitions. [2021-08-21 18:50:31,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:50:31,164 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 18:50:31,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:31,165 INFO L225 Difference]: With dead ends: 981 [2021-08-21 18:50:31,165 INFO L226 Difference]: Without dead ends: 972 [2021-08-21 18:50:31,165 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:31,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2021-08-21 18:50:31,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 844. [2021-08-21 18:50:31,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 843 states have (on average 2.202846975088968) internal successors, (1857), 843 states have internal predecessors, (1857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:31,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1857 transitions. [2021-08-21 18:50:31,175 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1857 transitions. Word has length 23 [2021-08-21 18:50:31,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:31,175 INFO L470 AbstractCegarLoop]: Abstraction has 844 states and 1857 transitions. [2021-08-21 18:50:31,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:31,176 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1857 transitions. [2021-08-21 18:50:31,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 18:50:31,177 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:31,177 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] [2021-08-21 18:50:31,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-08-21 18:50:31,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:31,385 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:31,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:31,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1566521219, now seen corresponding path program 5 times [2021-08-21 18:50:31,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:31,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547867948] [2021-08-21 18:50:31,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:31,386 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:31,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:31,460 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:50:31,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:31,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547867948] [2021-08-21 18:50:31,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547867948] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:31,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376016385] [2021-08-21 18:50:31,461 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:50:31,461 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:31,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:31,462 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:31,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-21 18:50:31,967 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:50:31,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:31,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:50:31,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:32,076 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:50:32,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376016385] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:32,077 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:32,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:50:32,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962698777] [2021-08-21 18:50:32,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:50:32,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:32,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:50:32,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:32,077 INFO L87 Difference]: Start difference. First operand 844 states and 1857 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:32,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:32,121 INFO L93 Difference]: Finished difference Result 985 states and 2093 transitions. [2021-08-21 18:50:32,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:50:32,121 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 18:50:32,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:32,122 INFO L225 Difference]: With dead ends: 985 [2021-08-21 18:50:32,123 INFO L226 Difference]: Without dead ends: 980 [2021-08-21 18:50:32,123 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.3ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:32,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2021-08-21 18:50:32,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 862. [2021-08-21 18:50:32,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 2.199767711962834) internal successors, (1894), 861 states have internal predecessors, (1894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:32,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1894 transitions. [2021-08-21 18:50:32,132 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1894 transitions. Word has length 23 [2021-08-21 18:50:32,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:32,132 INFO L470 AbstractCegarLoop]: Abstraction has 862 states and 1894 transitions. [2021-08-21 18:50:32,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:32,132 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1894 transitions. [2021-08-21 18:50:32,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 18:50:32,134 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:32,134 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] [2021-08-21 18:50:32,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-21 18:50:32,351 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,SelfDestructingSolverStorable44 [2021-08-21 18:50:32,351 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:32,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:32,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1682311169, now seen corresponding path program 6 times [2021-08-21 18:50:32,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:32,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894962528] [2021-08-21 18:50:32,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:32,352 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:32,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:32,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:50:32,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:32,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894962528] [2021-08-21 18:50:32,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894962528] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:32,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066445127] [2021-08-21 18:50:32,404 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:50:32,404 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:32,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:32,404 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:32,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-21 18:50:32,923 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:50:32,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:32,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:50:32,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:33,049 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:50:33,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066445127] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:33,050 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:33,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:50:33,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720950734] [2021-08-21 18:50:33,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:50:33,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:33,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:50:33,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:33,051 INFO L87 Difference]: Start difference. First operand 862 states and 1894 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:33,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:33,098 INFO L93 Difference]: Finished difference Result 987 states and 2099 transitions. [2021-08-21 18:50:33,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:50:33,098 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 18:50:33,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:33,100 INFO L225 Difference]: With dead ends: 987 [2021-08-21 18:50:33,100 INFO L226 Difference]: Without dead ends: 982 [2021-08-21 18:50:33,100 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:33,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2021-08-21 18:50:33,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 876. [2021-08-21 18:50:33,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 2.2022857142857144) internal successors, (1927), 875 states have internal predecessors, (1927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:33,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 1927 transitions. [2021-08-21 18:50:33,110 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 1927 transitions. Word has length 23 [2021-08-21 18:50:33,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:33,110 INFO L470 AbstractCegarLoop]: Abstraction has 876 states and 1927 transitions. [2021-08-21 18:50:33,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:33,110 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 1927 transitions. [2021-08-21 18:50:33,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 18:50:33,125 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:33,125 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:33,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-08-21 18:50:33,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:33,325 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:33,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:33,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1639854337, now seen corresponding path program 3 times [2021-08-21 18:50:33,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:33,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308111796] [2021-08-21 18:50:33,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:33,326 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:33,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:33,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:33,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:33,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308111796] [2021-08-21 18:50:33,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308111796] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:33,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870667652] [2021-08-21 18:50:33,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:50:33,396 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:33,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:33,397 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:33,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-21 18:50:33,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:50:33,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:33,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:50:33,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:34,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:34,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870667652] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:34,049 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:34,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:50:34,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451973585] [2021-08-21 18:50:34,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:50:34,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:34,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:50:34,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:34,049 INFO L87 Difference]: Start difference. First operand 876 states and 1927 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:34,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:34,088 INFO L93 Difference]: Finished difference Result 1062 states and 2246 transitions. [2021-08-21 18:50:34,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:50:34,088 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 18:50:34,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:34,090 INFO L225 Difference]: With dead ends: 1062 [2021-08-21 18:50:34,090 INFO L226 Difference]: Without dead ends: 1029 [2021-08-21 18:50:34,090 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.0ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:50:34,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2021-08-21 18:50:34,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 913. [2021-08-21 18:50:34,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 913 states, 912 states have (on average 2.182017543859649) internal successors, (1990), 912 states have internal predecessors, (1990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:34,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 1990 transitions. [2021-08-21 18:50:34,101 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 1990 transitions. Word has length 23 [2021-08-21 18:50:34,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:34,101 INFO L470 AbstractCegarLoop]: Abstraction has 913 states and 1990 transitions. [2021-08-21 18:50:34,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:34,101 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 1990 transitions. [2021-08-21 18:50:34,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:50:34,102 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:34,102 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] [2021-08-21 18:50:34,119 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-08-21 18:50:34,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:34,320 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:34,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:34,320 INFO L82 PathProgramCache]: Analyzing trace with hash -343263471, now seen corresponding path program 1 times [2021-08-21 18:50:34,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:34,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586493438] [2021-08-21 18:50:34,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:34,320 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:34,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:34,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:50:34,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:34,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586493438] [2021-08-21 18:50:34,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586493438] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:50:34,398 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:50:34,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 18:50:34,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675539651] [2021-08-21 18:50:34,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:50:34,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:34,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:50:34,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:50:34,399 INFO L87 Difference]: Start difference. First operand 913 states and 1990 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:34,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:34,454 INFO L93 Difference]: Finished difference Result 1070 states and 2227 transitions. [2021-08-21 18:50:34,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:50:34,454 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:50:34,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:34,456 INFO L225 Difference]: With dead ends: 1070 [2021-08-21 18:50:34,456 INFO L226 Difference]: Without dead ends: 1061 [2021-08-21 18:50:34,456 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.0ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:50:34,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1061 states. [2021-08-21 18:50:34,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1061 to 860. [2021-08-21 18:50:34,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 2.1734575087310826) internal successors, (1867), 859 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:34,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1867 transitions. [2021-08-21 18:50:34,466 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1867 transitions. Word has length 26 [2021-08-21 18:50:34,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:34,466 INFO L470 AbstractCegarLoop]: Abstraction has 860 states and 1867 transitions. [2021-08-21 18:50:34,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:34,466 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1867 transitions. [2021-08-21 18:50:34,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:50:34,467 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:34,467 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] [2021-08-21 18:50:34,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-08-21 18:50:34,467 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:34,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:34,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1918729651, now seen corresponding path program 2 times [2021-08-21 18:50:34,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:34,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736294382] [2021-08-21 18:50:34,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:34,468 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:34,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:34,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:50:34,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:34,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736294382] [2021-08-21 18:50:34,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736294382] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:34,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853830828] [2021-08-21 18:50:34,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:50:34,534 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:34,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:34,535 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:34,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-21 18:50:35,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:50:35,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:35,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:50:35,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:35,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:50:35,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853830828] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:35,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:35,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:50:35,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641199596] [2021-08-21 18:50:35,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:50:35,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:35,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:50:35,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:50:35,229 INFO L87 Difference]: Start difference. First operand 860 states and 1867 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:35,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:35,295 INFO L93 Difference]: Finished difference Result 1040 states and 2154 transitions. [2021-08-21 18:50:35,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:50:35,295 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:50:35,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:35,297 INFO L225 Difference]: With dead ends: 1040 [2021-08-21 18:50:35,297 INFO L226 Difference]: Without dead ends: 1035 [2021-08-21 18:50:35,297 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.9ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:50:35,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2021-08-21 18:50:35,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 874. [2021-08-21 18:50:35,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 873 states have (on average 2.1821305841924397) internal successors, (1905), 873 states have internal predecessors, (1905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:35,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 1905 transitions. [2021-08-21 18:50:35,307 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 1905 transitions. Word has length 26 [2021-08-21 18:50:35,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:35,307 INFO L470 AbstractCegarLoop]: Abstraction has 874 states and 1905 transitions. [2021-08-21 18:50:35,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:35,307 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 1905 transitions. [2021-08-21 18:50:35,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:50:35,309 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:35,309 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] [2021-08-21 18:50:35,339 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-08-21 18:50:35,525 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,SelfDestructingSolverStorable48 [2021-08-21 18:50:35,525 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:35,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:35,525 INFO L82 PathProgramCache]: Analyzing trace with hash 2084289817, now seen corresponding path program 3 times [2021-08-21 18:50:35,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:35,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875660911] [2021-08-21 18:50:35,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:35,526 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:35,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:35,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:50:35,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:35,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875660911] [2021-08-21 18:50:35,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875660911] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:35,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35905737] [2021-08-21 18:50:35,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:50:35,590 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:35,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:35,591 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:35,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-21 18:50:36,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:50:36,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:36,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:50:36,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:36,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:50:36,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35905737] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:36,310 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:36,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:50:36,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152372046] [2021-08-21 18:50:36,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:50:36,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:36,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:50:36,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:50:36,311 INFO L87 Difference]: Start difference. First operand 874 states and 1905 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:36,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:36,372 INFO L93 Difference]: Finished difference Result 1045 states and 2153 transitions. [2021-08-21 18:50:36,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:50:36,373 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:50:36,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:36,374 INFO L225 Difference]: With dead ends: 1045 [2021-08-21 18:50:36,375 INFO L226 Difference]: Without dead ends: 1040 [2021-08-21 18:50:36,375 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.4ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:50:36,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1040 states. [2021-08-21 18:50:36,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1040 to 868. [2021-08-21 18:50:36,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 2.17762399077278) internal successors, (1888), 867 states have internal predecessors, (1888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:36,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 1888 transitions. [2021-08-21 18:50:36,384 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 1888 transitions. Word has length 26 [2021-08-21 18:50:36,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:36,384 INFO L470 AbstractCegarLoop]: Abstraction has 868 states and 1888 transitions. [2021-08-21 18:50:36,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:36,385 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 1888 transitions. [2021-08-21 18:50:36,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:50:36,386 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:36,386 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:36,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-21 18:50:36,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-21 18:50:36,604 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:36,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:36,604 INFO L82 PathProgramCache]: Analyzing trace with hash 236385885, now seen corresponding path program 7 times [2021-08-21 18:50:36,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:36,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213126860] [2021-08-21 18:50:36,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:36,604 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:36,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:36,674 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:50:36,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:36,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213126860] [2021-08-21 18:50:36,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213126860] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:36,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838218659] [2021-08-21 18:50:36,675 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:50:36,675 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:36,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:36,689 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:36,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-21 18:50:37,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:37,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:50:37,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:37,511 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:50:37,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838218659] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:37,512 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:37,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:50:37,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106781226] [2021-08-21 18:50:37,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:50:37,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:37,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:50:37,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:50:37,512 INFO L87 Difference]: Start difference. First operand 868 states and 1888 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:37,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:37,571 INFO L93 Difference]: Finished difference Result 1097 states and 2279 transitions. [2021-08-21 18:50:37,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:50:37,571 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:50:37,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:37,573 INFO L225 Difference]: With dead ends: 1097 [2021-08-21 18:50:37,573 INFO L226 Difference]: Without dead ends: 1088 [2021-08-21 18:50:37,573 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.5ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:50:37,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2021-08-21 18:50:37,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 926. [2021-08-21 18:50:37,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 2.175135135135135) internal successors, (2012), 925 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:37,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 2012 transitions. [2021-08-21 18:50:37,589 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 2012 transitions. Word has length 26 [2021-08-21 18:50:37,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:37,590 INFO L470 AbstractCegarLoop]: Abstraction has 926 states and 2012 transitions. [2021-08-21 18:50:37,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:37,590 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 2012 transitions. [2021-08-21 18:50:37,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:50:37,592 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:37,592 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:37,615 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-08-21 18:50:37,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:37,799 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:37,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:37,799 INFO L82 PathProgramCache]: Analyzing trace with hash -2016887787, now seen corresponding path program 7 times [2021-08-21 18:50:37,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:37,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638788068] [2021-08-21 18:50:37,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:37,799 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:37,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:37,893 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:50:37,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:37,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638788068] [2021-08-21 18:50:37,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638788068] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:37,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249565721] [2021-08-21 18:50:37,893 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:50:37,894 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:37,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:37,894 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:37,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-21 18:50:38,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:38,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:50:38,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:38,605 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:50:38,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249565721] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:38,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:38,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:50:38,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704650987] [2021-08-21 18:50:38,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:50:38,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:38,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:50:38,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:50:38,606 INFO L87 Difference]: Start difference. First operand 926 states and 2012 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:38,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:38,665 INFO L93 Difference]: Finished difference Result 1099 states and 2255 transitions. [2021-08-21 18:50:38,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:50:38,666 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:50:38,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:38,667 INFO L225 Difference]: With dead ends: 1099 [2021-08-21 18:50:38,667 INFO L226 Difference]: Without dead ends: 1094 [2021-08-21 18:50:38,667 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.5ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:50:38,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2021-08-21 18:50:38,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 906. [2021-08-21 18:50:38,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 905 states have (on average 2.1591160220994476) internal successors, (1954), 905 states have internal predecessors, (1954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:38,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 1954 transitions. [2021-08-21 18:50:38,677 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 1954 transitions. Word has length 26 [2021-08-21 18:50:38,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:38,677 INFO L470 AbstractCegarLoop]: Abstraction has 906 states and 1954 transitions. [2021-08-21 18:50:38,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:38,677 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 1954 transitions. [2021-08-21 18:50:38,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:50:38,678 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:38,678 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] [2021-08-21 18:50:38,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-21 18:50:38,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:38,897 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:38,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:38,897 INFO L82 PathProgramCache]: Analyzing trace with hash 430175577, now seen corresponding path program 4 times [2021-08-21 18:50:38,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:38,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451773182] [2021-08-21 18:50:38,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:38,898 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:38,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:38,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:50:38,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:38,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451773182] [2021-08-21 18:50:38,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451773182] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:38,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301214149] [2021-08-21 18:50:38,979 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:50:38,979 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:38,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:38,981 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:38,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-21 18:50:39,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:50:39,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:39,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:50:39,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:39,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:50:39,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301214149] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:39,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:39,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:50:39,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079215812] [2021-08-21 18:50:39,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:50:39,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:39,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:50:39,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:50:39,732 INFO L87 Difference]: Start difference. First operand 906 states and 1954 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:39,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:39,790 INFO L93 Difference]: Finished difference Result 1096 states and 2266 transitions. [2021-08-21 18:50:39,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:50:39,790 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:50:39,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:39,792 INFO L225 Difference]: With dead ends: 1096 [2021-08-21 18:50:39,792 INFO L226 Difference]: Without dead ends: 1087 [2021-08-21 18:50:39,792 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.2ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:50:39,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2021-08-21 18:50:39,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 911. [2021-08-21 18:50:39,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 910 states have (on average 2.178021978021978) internal successors, (1982), 910 states have internal predecessors, (1982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:39,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 1982 transitions. [2021-08-21 18:50:39,805 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 1982 transitions. Word has length 26 [2021-08-21 18:50:39,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:39,805 INFO L470 AbstractCegarLoop]: Abstraction has 911 states and 1982 transitions. [2021-08-21 18:50:39,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:39,805 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 1982 transitions. [2021-08-21 18:50:39,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:50:39,806 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:39,806 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] [2021-08-21 18:50:39,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-21 18:50:40,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:40,024 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:40,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:40,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1815674197, now seen corresponding path program 5 times [2021-08-21 18:50:40,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:40,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324667067] [2021-08-21 18:50:40,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:40,025 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:40,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:40,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:40,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:40,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324667067] [2021-08-21 18:50:40,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324667067] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:40,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406991431] [2021-08-21 18:50:40,098 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:50:40,099 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:40,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:40,099 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:40,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-21 18:50:40,731 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:50:40,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:40,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:50:40,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:40,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:40,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406991431] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:40,850 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:40,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:50:40,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626442610] [2021-08-21 18:50:40,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:50:40,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:40,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:50:40,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:50:40,850 INFO L87 Difference]: Start difference. First operand 911 states and 1982 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:40,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:40,940 INFO L93 Difference]: Finished difference Result 1071 states and 2224 transitions. [2021-08-21 18:50:40,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:50:40,940 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:50:40,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:40,942 INFO L225 Difference]: With dead ends: 1071 [2021-08-21 18:50:40,942 INFO L226 Difference]: Without dead ends: 1066 [2021-08-21 18:50:40,943 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.3ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:50:40,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2021-08-21 18:50:40,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 906. [2021-08-21 18:50:40,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 905 states have (on average 2.175690607734807) internal successors, (1969), 905 states have internal predecessors, (1969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:40,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 1969 transitions. [2021-08-21 18:50:40,952 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 1969 transitions. Word has length 26 [2021-08-21 18:50:40,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:40,953 INFO L470 AbstractCegarLoop]: Abstraction has 906 states and 1969 transitions. [2021-08-21 18:50:40,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:40,953 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 1969 transitions. [2021-08-21 18:50:40,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:50:40,954 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:40,954 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] [2021-08-21 18:50:40,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-21 18:50:41,168 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,SelfDestructingSolverStorable53 [2021-08-21 18:50:41,169 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:41,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:41,169 INFO L82 PathProgramCache]: Analyzing trace with hash 769539289, now seen corresponding path program 6 times [2021-08-21 18:50:41,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:41,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342403652] [2021-08-21 18:50:41,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:41,169 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:41,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:41,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:41,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:41,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342403652] [2021-08-21 18:50:41,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342403652] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:41,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437118340] [2021-08-21 18:50:41,231 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:50:41,231 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:41,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:41,232 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:41,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-21 18:50:41,933 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:50:41,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:41,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:50:41,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:42,073 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:42,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437118340] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:42,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:42,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:50:42,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061604029] [2021-08-21 18:50:42,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:50:42,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:42,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:50:42,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:50:42,075 INFO L87 Difference]: Start difference. First operand 906 states and 1969 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:42,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:42,137 INFO L93 Difference]: Finished difference Result 1054 states and 2192 transitions. [2021-08-21 18:50:42,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:50:42,137 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:50:42,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:42,139 INFO L225 Difference]: With dead ends: 1054 [2021-08-21 18:50:42,139 INFO L226 Difference]: Without dead ends: 1049 [2021-08-21 18:50:42,139 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.4ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:50:42,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1049 states. [2021-08-21 18:50:42,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1049 to 892. [2021-08-21 18:50:42,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 2.1616161616161618) internal successors, (1926), 891 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:42,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 1926 transitions. [2021-08-21 18:50:42,149 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 1926 transitions. Word has length 26 [2021-08-21 18:50:42,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:42,149 INFO L470 AbstractCegarLoop]: Abstraction has 892 states and 1926 transitions. [2021-08-21 18:50:42,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:42,149 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 1926 transitions. [2021-08-21 18:50:42,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:50:42,150 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:42,150 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:42,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-21 18:50:42,364 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,SelfDestructingSolverStorable54 [2021-08-21 18:50:42,365 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:42,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:42,365 INFO L82 PathProgramCache]: Analyzing trace with hash 727082457, now seen corresponding path program 7 times [2021-08-21 18:50:42,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:42,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487089554] [2021-08-21 18:50:42,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:42,365 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:42,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:42,426 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:50:42,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:42,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487089554] [2021-08-21 18:50:42,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487089554] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:42,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842029406] [2021-08-21 18:50:42,426 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:50:42,426 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:42,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:42,427 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:42,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-21 18:50:43,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:43,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:50:43,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:43,234 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:50:43,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842029406] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:43,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:43,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:50:43,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217231867] [2021-08-21 18:50:43,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:50:43,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:43,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:50:43,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:50:43,235 INFO L87 Difference]: Start difference. First operand 892 states and 1926 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:43,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:43,291 INFO L93 Difference]: Finished difference Result 1119 states and 2315 transitions. [2021-08-21 18:50:43,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:50:43,292 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:50:43,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:43,293 INFO L225 Difference]: With dead ends: 1119 [2021-08-21 18:50:43,293 INFO L226 Difference]: Without dead ends: 1086 [2021-08-21 18:50:43,293 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.7ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:50:43,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2021-08-21 18:50:43,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 904. [2021-08-21 18:50:43,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 2.1483942414174972) internal successors, (1940), 903 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:43,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 1940 transitions. [2021-08-21 18:50:43,304 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 1940 transitions. Word has length 26 [2021-08-21 18:50:43,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:43,304 INFO L470 AbstractCegarLoop]: Abstraction has 904 states and 1940 transitions. [2021-08-21 18:50:43,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:43,304 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 1940 transitions. [2021-08-21 18:50:43,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:50:43,305 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:43,305 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:43,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-21 18:50:43,523 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,SelfDestructingSolverStorable55 [2021-08-21 18:50:43,523 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:43,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:43,524 INFO L82 PathProgramCache]: Analyzing trace with hash 185235353, now seen corresponding path program 8 times [2021-08-21 18:50:43,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:43,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990462018] [2021-08-21 18:50:43,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:43,524 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:43,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:43,588 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:50:43,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:43,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990462018] [2021-08-21 18:50:43,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990462018] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:43,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157518210] [2021-08-21 18:50:43,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:50:43,589 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:43,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:43,590 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:43,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-21 18:50:44,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:50:44,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:44,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:50:44,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:44,404 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:50:44,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157518210] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:44,405 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:44,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:50:44,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470984253] [2021-08-21 18:50:44,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:50:44,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:44,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:50:44,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:50:44,406 INFO L87 Difference]: Start difference. First operand 904 states and 1940 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:44,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:44,464 INFO L93 Difference]: Finished difference Result 1085 states and 2206 transitions. [2021-08-21 18:50:44,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:50:44,464 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:50:44,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:44,467 INFO L225 Difference]: With dead ends: 1085 [2021-08-21 18:50:44,467 INFO L226 Difference]: Without dead ends: 1080 [2021-08-21 18:50:44,467 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.2ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:50:44,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2021-08-21 18:50:44,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 911. [2021-08-21 18:50:44,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 910 states have (on average 2.143956043956044) internal successors, (1951), 910 states have internal predecessors, (1951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:44,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 1951 transitions. [2021-08-21 18:50:44,476 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 1951 transitions. Word has length 26 [2021-08-21 18:50:44,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:44,476 INFO L470 AbstractCegarLoop]: Abstraction has 911 states and 1951 transitions. [2021-08-21 18:50:44,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:44,476 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 1951 transitions. [2021-08-21 18:50:44,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:50:44,477 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:44,477 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:44,512 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-08-21 18:50:44,695 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,SelfDestructingSolverStorable56 [2021-08-21 18:50:44,695 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:44,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:44,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1662668579, now seen corresponding path program 8 times [2021-08-21 18:50:44,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:44,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782170598] [2021-08-21 18:50:44,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:44,696 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:44,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:44,767 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:50:44,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:44,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782170598] [2021-08-21 18:50:44,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782170598] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:44,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013944339] [2021-08-21 18:50:44,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:50:44,767 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:44,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:44,768 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:44,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-21 18:50:45,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:50:45,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:45,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:50:45,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:45,606 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:50:45,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013944339] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:45,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:45,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:50:45,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123434663] [2021-08-21 18:50:45,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:50:45,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:45,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:50:45,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:50:45,607 INFO L87 Difference]: Start difference. First operand 911 states and 1951 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:45,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:45,667 INFO L93 Difference]: Finished difference Result 1117 states and 2291 transitions. [2021-08-21 18:50:45,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:50:45,668 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:50:45,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:45,669 INFO L225 Difference]: With dead ends: 1117 [2021-08-21 18:50:45,669 INFO L226 Difference]: Without dead ends: 1108 [2021-08-21 18:50:45,669 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.5ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:50:45,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2021-08-21 18:50:45,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 945. [2021-08-21 18:50:45,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 944 states have (on average 2.1504237288135593) internal successors, (2030), 944 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:45,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 2030 transitions. [2021-08-21 18:50:45,679 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 2030 transitions. Word has length 26 [2021-08-21 18:50:45,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:45,679 INFO L470 AbstractCegarLoop]: Abstraction has 945 states and 2030 transitions. [2021-08-21 18:50:45,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:45,679 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 2030 transitions. [2021-08-21 18:50:45,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:50:45,680 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:45,680 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:45,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-21 18:50:45,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:45,899 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:45,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:45,899 INFO L82 PathProgramCache]: Analyzing trace with hash 906681293, now seen corresponding path program 9 times [2021-08-21 18:50:45,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:45,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835192654] [2021-08-21 18:50:45,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:45,899 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:45,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:45,961 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:45,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:45,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835192654] [2021-08-21 18:50:45,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835192654] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:45,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836440979] [2021-08-21 18:50:45,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:50:45,961 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:45,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:45,962 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:45,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-21 18:50:46,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:50:46,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:46,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:50:46,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:46,825 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:46,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836440979] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:46,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:46,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:50:46,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50016649] [2021-08-21 18:50:46,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:50:46,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:46,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:50:46,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:50:46,827 INFO L87 Difference]: Start difference. First operand 945 states and 2030 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:46,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:46,886 INFO L93 Difference]: Finished difference Result 1130 states and 2308 transitions. [2021-08-21 18:50:46,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:50:46,887 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:50:46,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:46,888 INFO L225 Difference]: With dead ends: 1130 [2021-08-21 18:50:46,889 INFO L226 Difference]: Without dead ends: 1125 [2021-08-21 18:50:46,889 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.6ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:50:46,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2021-08-21 18:50:46,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 976. [2021-08-21 18:50:46,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 976 states, 975 states have (on average 2.1569230769230767) internal successors, (2103), 975 states have internal predecessors, (2103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:46,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 2103 transitions. [2021-08-21 18:50:46,899 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 2103 transitions. Word has length 26 [2021-08-21 18:50:46,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:46,899 INFO L470 AbstractCegarLoop]: Abstraction has 976 states and 2103 transitions. [2021-08-21 18:50:46,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:46,899 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 2103 transitions. [2021-08-21 18:50:46,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:50:46,900 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:46,900 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:46,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-21 18:50:47,115 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,SelfDestructingSolverStorable58 [2021-08-21 18:50:47,115 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:47,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:47,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1049271889, now seen corresponding path program 9 times [2021-08-21 18:50:47,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:47,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443872778] [2021-08-21 18:50:47,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:47,116 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:47,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:47,176 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:47,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:47,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443872778] [2021-08-21 18:50:47,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443872778] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:47,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108888026] [2021-08-21 18:50:47,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:50:47,177 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:47,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:47,178 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:47,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-21 18:50:47,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:50:47,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:47,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:50:47,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:48,084 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:48,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108888026] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:48,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:48,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:50:48,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606700128] [2021-08-21 18:50:48,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:50:48,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:48,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:50:48,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:50:48,085 INFO L87 Difference]: Start difference. First operand 976 states and 2103 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:48,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:48,148 INFO L93 Difference]: Finished difference Result 1147 states and 2351 transitions. [2021-08-21 18:50:48,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:50:48,148 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:50:48,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:48,150 INFO L225 Difference]: With dead ends: 1147 [2021-08-21 18:50:48,150 INFO L226 Difference]: Without dead ends: 1142 [2021-08-21 18:50:48,150 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.9ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:50:48,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2021-08-21 18:50:48,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 994. [2021-08-21 18:50:48,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 994 states, 993 states have (on average 2.1711983887210473) internal successors, (2156), 993 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:48,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 994 states to 994 states and 2156 transitions. [2021-08-21 18:50:48,161 INFO L78 Accepts]: Start accepts. Automaton has 994 states and 2156 transitions. Word has length 26 [2021-08-21 18:50:48,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:48,161 INFO L470 AbstractCegarLoop]: Abstraction has 994 states and 2156 transitions. [2021-08-21 18:50:48,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:48,161 INFO L276 IsEmpty]: Start isEmpty. Operand 994 states and 2156 transitions. [2021-08-21 18:50:48,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:50:48,164 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:48,164 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] [2021-08-21 18:50:48,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-21 18:50:48,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-21 18:50:48,383 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:48,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:48,383 INFO L82 PathProgramCache]: Analyzing trace with hash -2100710763, now seen corresponding path program 7 times [2021-08-21 18:50:48,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:48,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70783760] [2021-08-21 18:50:48,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:48,384 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:48,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:48,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:50:48,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:48,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70783760] [2021-08-21 18:50:48,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70783760] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:48,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618254041] [2021-08-21 18:50:48,446 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:50:48,446 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:48,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:48,452 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:48,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-21 18:50:49,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:49,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:50:49,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:49,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:50:49,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618254041] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:49,253 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:49,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:50:49,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676047658] [2021-08-21 18:50:49,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:50:49,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:49,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:50:49,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:50:49,254 INFO L87 Difference]: Start difference. First operand 994 states and 2156 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:49,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:49,323 INFO L93 Difference]: Finished difference Result 1226 states and 2562 transitions. [2021-08-21 18:50:49,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:50:49,323 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:50:49,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:49,325 INFO L225 Difference]: With dead ends: 1226 [2021-08-21 18:50:49,325 INFO L226 Difference]: Without dead ends: 1217 [2021-08-21 18:50:49,325 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.8ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:50:49,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2021-08-21 18:50:49,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 1052. [2021-08-21 18:50:49,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1052 states, 1051 states have (on average 2.1779257849666984) internal successors, (2289), 1051 states have internal predecessors, (2289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:49,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 2289 transitions. [2021-08-21 18:50:49,335 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 2289 transitions. Word has length 26 [2021-08-21 18:50:49,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:49,336 INFO L470 AbstractCegarLoop]: Abstraction has 1052 states and 2289 transitions. [2021-08-21 18:50:49,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:49,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 2289 transitions. [2021-08-21 18:50:49,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:50:49,337 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:49,337 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] [2021-08-21 18:50:49,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-08-21 18:50:49,554 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,SelfDestructingSolverStorable60 [2021-08-21 18:50:49,555 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:49,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:49,556 INFO L82 PathProgramCache]: Analyzing trace with hash 618790353, now seen corresponding path program 8 times [2021-08-21 18:50:49,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:49,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577227835] [2021-08-21 18:50:49,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:49,556 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:49,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:49,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:49,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:49,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577227835] [2021-08-21 18:50:49,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577227835] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:49,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419578554] [2021-08-21 18:50:49,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:50:49,651 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:49,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:49,652 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:49,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-21 18:50:50,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:50:50,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:50,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:50:50,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:50,514 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:50,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419578554] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:50,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:50,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:50:50,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105423198] [2021-08-21 18:50:50,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:50:50,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:50,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:50:50,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:50:50,515 INFO L87 Difference]: Start difference. First operand 1052 states and 2289 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:50,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:50,576 INFO L93 Difference]: Finished difference Result 1232 states and 2571 transitions. [2021-08-21 18:50:50,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:50:50,576 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:50:50,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:50,578 INFO L225 Difference]: With dead ends: 1232 [2021-08-21 18:50:50,578 INFO L226 Difference]: Without dead ends: 1227 [2021-08-21 18:50:50,578 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.7ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:50:50,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2021-08-21 18:50:50,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 1070. [2021-08-21 18:50:50,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1070 states, 1069 states have (on average 2.1796071094480824) internal successors, (2330), 1069 states have internal predecessors, (2330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:50,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 2330 transitions. [2021-08-21 18:50:50,588 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 2330 transitions. Word has length 26 [2021-08-21 18:50:50,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:50,588 INFO L470 AbstractCegarLoop]: Abstraction has 1070 states and 2330 transitions. [2021-08-21 18:50:50,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:50,588 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 2330 transitions. [2021-08-21 18:50:50,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:50:50,589 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:50,590 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:50,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-21 18:50:50,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:50,807 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:50,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:50,808 INFO L82 PathProgramCache]: Analyzing trace with hash 991472101, now seen corresponding path program 10 times [2021-08-21 18:50:50,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:50,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793963754] [2021-08-21 18:50:50,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:50,808 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:50,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:50,864 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:50,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:50,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793963754] [2021-08-21 18:50:50,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793963754] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:50,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574505703] [2021-08-21 18:50:50,865 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:50:50,865 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:50,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:50,866 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:50,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-21 18:50:51,631 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:50:51,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:51,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:50:51,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:51,761 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:51,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574505703] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:51,761 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:51,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:50:51,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712232547] [2021-08-21 18:50:51,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:50:51,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:51,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:50:51,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:50:51,762 INFO L87 Difference]: Start difference. First operand 1070 states and 2330 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:51,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:51,821 INFO L93 Difference]: Finished difference Result 1264 states and 2633 transitions. [2021-08-21 18:50:51,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:50:51,821 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:50:51,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:51,823 INFO L225 Difference]: With dead ends: 1264 [2021-08-21 18:50:51,823 INFO L226 Difference]: Without dead ends: 1259 [2021-08-21 18:50:51,823 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.2ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:50:51,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2021-08-21 18:50:51,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 1060. [2021-08-21 18:50:51,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1060 states, 1059 states have (on average 2.174693106704438) internal successors, (2303), 1059 states have internal predecessors, (2303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:51,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1060 states to 1060 states and 2303 transitions. [2021-08-21 18:50:51,833 INFO L78 Accepts]: Start accepts. Automaton has 1060 states and 2303 transitions. Word has length 26 [2021-08-21 18:50:51,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:51,833 INFO L470 AbstractCegarLoop]: Abstraction has 1060 states and 2303 transitions. [2021-08-21 18:50:51,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:51,833 INFO L276 IsEmpty]: Start isEmpty. Operand 1060 states and 2303 transitions. [2021-08-21 18:50:51,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:50:51,834 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:51,834 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:51,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-08-21 18:50:52,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:52,052 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:52,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:52,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1897081841, now seen corresponding path program 11 times [2021-08-21 18:50:52,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:52,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006441913] [2021-08-21 18:50:52,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:52,053 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:52,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:52,115 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:52,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:52,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006441913] [2021-08-21 18:50:52,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006441913] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:52,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409637808] [2021-08-21 18:50:52,116 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:50:52,116 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:52,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:52,117 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:52,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-21 18:50:52,919 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:50:52,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:52,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:50:52,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:53,041 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:53,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409637808] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:53,042 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:53,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:50:53,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063980311] [2021-08-21 18:50:53,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:50:53,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:53,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:50:53,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:50:53,042 INFO L87 Difference]: Start difference. First operand 1060 states and 2303 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:53,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:53,103 INFO L93 Difference]: Finished difference Result 1241 states and 2579 transitions. [2021-08-21 18:50:53,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:50:53,103 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:50:53,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:53,105 INFO L225 Difference]: With dead ends: 1241 [2021-08-21 18:50:53,105 INFO L226 Difference]: Without dead ends: 1236 [2021-08-21 18:50:53,105 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.0ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:50:53,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2021-08-21 18:50:53,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 1068. [2021-08-21 18:50:53,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1068 states, 1067 states have (on average 2.177132146204311) internal successors, (2323), 1067 states have internal predecessors, (2323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:53,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 2323 transitions. [2021-08-21 18:50:53,115 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 2323 transitions. Word has length 26 [2021-08-21 18:50:53,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:53,115 INFO L470 AbstractCegarLoop]: Abstraction has 1068 states and 2323 transitions. [2021-08-21 18:50:53,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:53,115 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 2323 transitions. [2021-08-21 18:50:53,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:50:53,116 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:53,117 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] [2021-08-21 18:50:53,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-21 18:50:53,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:53,335 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:53,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:53,335 INFO L82 PathProgramCache]: Analyzing trace with hash 555003041, now seen corresponding path program 9 times [2021-08-21 18:50:53,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:53,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426870845] [2021-08-21 18:50:53,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:53,335 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:53,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:53,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:50:53,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:53,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426870845] [2021-08-21 18:50:53,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426870845] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:53,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768601300] [2021-08-21 18:50:53,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:50:53,399 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:53,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:53,425 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:53,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-21 18:50:54,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:50:54,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:54,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:50:54,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:54,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:50:54,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768601300] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:54,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:54,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:50:54,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572031782] [2021-08-21 18:50:54,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:50:54,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:54,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:50:54,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:50:54,360 INFO L87 Difference]: Start difference. First operand 1068 states and 2323 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:54,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:54,416 INFO L93 Difference]: Finished difference Result 1270 states and 2651 transitions. [2021-08-21 18:50:54,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:50:54,416 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:50:54,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:54,418 INFO L225 Difference]: With dead ends: 1270 [2021-08-21 18:50:54,418 INFO L226 Difference]: Without dead ends: 1265 [2021-08-21 18:50:54,418 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.7ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:50:54,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2021-08-21 18:50:54,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 1095. [2021-08-21 18:50:54,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1095 states, 1094 states have (on average 2.1882998171846437) internal successors, (2394), 1094 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:54,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1095 states to 1095 states and 2394 transitions. [2021-08-21 18:50:54,428 INFO L78 Accepts]: Start accepts. Automaton has 1095 states and 2394 transitions. Word has length 26 [2021-08-21 18:50:54,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:54,428 INFO L470 AbstractCegarLoop]: Abstraction has 1095 states and 2394 transitions. [2021-08-21 18:50:54,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:54,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1095 states and 2394 transitions. [2021-08-21 18:50:54,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:50:54,430 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:54,430 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:54,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-08-21 18:50:54,644 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,SelfDestructingSolverStorable64 [2021-08-21 18:50:54,645 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:54,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:54,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1292900891, now seen corresponding path program 12 times [2021-08-21 18:50:54,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:54,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999324089] [2021-08-21 18:50:54,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:54,645 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:54,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:54,706 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:50:54,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:54,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999324089] [2021-08-21 18:50:54,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999324089] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:54,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48369239] [2021-08-21 18:50:54,706 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:50:54,706 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:54,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:54,707 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:54,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-21 18:50:55,495 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:50:55,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:55,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:50:55,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:55,618 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:50:55,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48369239] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:55,619 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:55,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:50:55,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805989036] [2021-08-21 18:50:55,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:50:55,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:55,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:50:55,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:50:55,619 INFO L87 Difference]: Start difference. First operand 1095 states and 2394 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:55,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:55,670 INFO L93 Difference]: Finished difference Result 1296 states and 2717 transitions. [2021-08-21 18:50:55,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:50:55,670 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:50:55,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:55,672 INFO L225 Difference]: With dead ends: 1296 [2021-08-21 18:50:55,672 INFO L226 Difference]: Without dead ends: 1287 [2021-08-21 18:50:55,672 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.8ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:50:55,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2021-08-21 18:50:55,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 1113. [2021-08-21 18:50:55,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1113 states, 1112 states have (on average 2.183453237410072) internal successors, (2428), 1112 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:55,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1113 states to 1113 states and 2428 transitions. [2021-08-21 18:50:55,682 INFO L78 Accepts]: Start accepts. Automaton has 1113 states and 2428 transitions. Word has length 26 [2021-08-21 18:50:55,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:55,682 INFO L470 AbstractCegarLoop]: Abstraction has 1113 states and 2428 transitions. [2021-08-21 18:50:55,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:55,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1113 states and 2428 transitions. [2021-08-21 18:50:55,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:50:55,684 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:55,684 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:55,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-08-21 18:50:55,902 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,SelfDestructingSolverStorable65 [2021-08-21 18:50:55,902 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:55,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:55,903 INFO L82 PathProgramCache]: Analyzing trace with hash -663078499, now seen corresponding path program 10 times [2021-08-21 18:50:55,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:55,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549915124] [2021-08-21 18:50:55,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:55,903 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:55,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:55,961 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:55,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:55,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549915124] [2021-08-21 18:50:55,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549915124] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:55,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189172983] [2021-08-21 18:50:55,961 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:50:55,961 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:55,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:55,962 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:55,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-21 18:50:56,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:50:56,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:56,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:50:56,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:56,880 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:56,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189172983] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:56,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:56,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:50:56,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726502008] [2021-08-21 18:50:56,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:50:56,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:56,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:50:56,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:50:56,882 INFO L87 Difference]: Start difference. First operand 1113 states and 2428 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:56,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:56,947 INFO L93 Difference]: Finished difference Result 1288 states and 2693 transitions. [2021-08-21 18:50:56,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:50:56,948 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:50:56,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:56,949 INFO L225 Difference]: With dead ends: 1288 [2021-08-21 18:50:56,949 INFO L226 Difference]: Without dead ends: 1283 [2021-08-21 18:50:56,949 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.9ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:50:56,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1283 states. [2021-08-21 18:50:56,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1283 to 1108. [2021-08-21 18:50:56,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1108 states, 1107 states have (on average 2.177958446251129) internal successors, (2411), 1107 states have internal predecessors, (2411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:56,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 2411 transitions. [2021-08-21 18:50:56,962 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 2411 transitions. Word has length 26 [2021-08-21 18:50:56,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:56,962 INFO L470 AbstractCegarLoop]: Abstraction has 1108 states and 2411 transitions. [2021-08-21 18:50:56,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:56,962 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 2411 transitions. [2021-08-21 18:50:56,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:50:56,963 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:56,963 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:56,981 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-08-21 18:50:57,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-08-21 18:50:57,181 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:57,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:57,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1266477721, now seen corresponding path program 11 times [2021-08-21 18:50:57,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:57,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669734307] [2021-08-21 18:50:57,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:57,182 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:57,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:57,263 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:57,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:57,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669734307] [2021-08-21 18:50:57,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669734307] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:57,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953463682] [2021-08-21 18:50:57,264 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:50:57,264 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:57,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:57,265 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:57,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-21 18:50:58,143 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:50:58,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:58,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:50:58,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:58,267 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:50:58,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953463682] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:58,268 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:58,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:50:58,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824531327] [2021-08-21 18:50:58,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:50:58,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:58,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:50:58,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:50:58,268 INFO L87 Difference]: Start difference. First operand 1108 states and 2411 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:58,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:58,331 INFO L93 Difference]: Finished difference Result 1272 states and 2656 transitions. [2021-08-21 18:50:58,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:50:58,331 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:50:58,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:58,333 INFO L225 Difference]: With dead ends: 1272 [2021-08-21 18:50:58,333 INFO L226 Difference]: Without dead ends: 1267 [2021-08-21 18:50:58,333 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.5ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:50:58,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2021-08-21 18:50:58,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 1112. [2021-08-21 18:50:58,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 2.180918091809181) internal successors, (2423), 1111 states have internal predecessors, (2423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:58,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 2423 transitions. [2021-08-21 18:50:58,343 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 2423 transitions. Word has length 26 [2021-08-21 18:50:58,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:58,343 INFO L470 AbstractCegarLoop]: Abstraction has 1112 states and 2423 transitions. [2021-08-21 18:50:58,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:58,344 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 2423 transitions. [2021-08-21 18:50:58,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:50:58,345 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:58,345 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:50:58,384 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-08-21 18:50:58,563 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,SelfDestructingSolverStorable67 [2021-08-21 18:50:58,563 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:58,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:58,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1301973269, now seen corresponding path program 12 times [2021-08-21 18:50:58,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:58,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524970054] [2021-08-21 18:50:58,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:58,564 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:58,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:58,627 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:50:58,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:58,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524970054] [2021-08-21 18:50:58,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524970054] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:58,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125203202] [2021-08-21 18:50:58,627 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:50:58,627 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:58,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:58,641 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:50:58,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-21 18:50:59,556 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:50:59,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:50:59,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:50:59,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:59,686 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:50:59,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125203202] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:59,687 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:59,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:50:59,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706626643] [2021-08-21 18:50:59,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:50:59,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:59,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:50:59,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:50:59,687 INFO L87 Difference]: Start difference. First operand 1112 states and 2423 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:59,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:59,742 INFO L93 Difference]: Finished difference Result 1293 states and 2711 transitions. [2021-08-21 18:50:59,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:50:59,743 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:50:59,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:59,744 INFO L225 Difference]: With dead ends: 1293 [2021-08-21 18:50:59,744 INFO L226 Difference]: Without dead ends: 1288 [2021-08-21 18:50:59,744 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.8ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:50:59,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2021-08-21 18:50:59,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 1126. [2021-08-21 18:50:59,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1126 states, 1125 states have (on average 2.1902222222222223) internal successors, (2464), 1125 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:59,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 2464 transitions. [2021-08-21 18:50:59,754 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 2464 transitions. Word has length 26 [2021-08-21 18:50:59,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:59,754 INFO L470 AbstractCegarLoop]: Abstraction has 1126 states and 2464 transitions. [2021-08-21 18:50:59,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:59,754 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 2464 transitions. [2021-08-21 18:50:59,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:50:59,756 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:59,756 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] [2021-08-21 18:50:59,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-21 18:50:59,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-08-21 18:50:59,973 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:50:59,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:59,973 INFO L82 PathProgramCache]: Analyzing trace with hash -545930663, now seen corresponding path program 10 times [2021-08-21 18:50:59,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:59,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809422039] [2021-08-21 18:50:59,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:59,973 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:59,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:00,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:51:00,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:00,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809422039] [2021-08-21 18:51:00,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809422039] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:00,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677318842] [2021-08-21 18:51:00,030 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:51:00,031 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:00,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:00,045 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:51:00,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-21 18:51:00,973 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:51:00,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:00,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:51:00,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:01,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:51:01,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677318842] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:01,163 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:01,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:51:01,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192879452] [2021-08-21 18:51:01,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:51:01,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:01,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:51:01,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:01,164 INFO L87 Difference]: Start difference. First operand 1126 states and 2464 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:01,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:01,236 INFO L93 Difference]: Finished difference Result 1304 states and 2747 transitions. [2021-08-21 18:51:01,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:51:01,236 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:51:01,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:01,239 INFO L225 Difference]: With dead ends: 1304 [2021-08-21 18:51:01,239 INFO L226 Difference]: Without dead ends: 1295 [2021-08-21 18:51:01,239 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.4ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:01,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1295 states. [2021-08-21 18:51:01,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1295 to 1130. [2021-08-21 18:51:01,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1130 states, 1129 states have (on average 2.187776793622675) internal successors, (2470), 1129 states have internal predecessors, (2470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:01,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1130 states to 1130 states and 2470 transitions. [2021-08-21 18:51:01,253 INFO L78 Accepts]: Start accepts. Automaton has 1130 states and 2470 transitions. Word has length 26 [2021-08-21 18:51:01,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:01,253 INFO L470 AbstractCegarLoop]: Abstraction has 1130 states and 2470 transitions. [2021-08-21 18:51:01,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:01,253 INFO L276 IsEmpty]: Start isEmpty. Operand 1130 states and 2470 transitions. [2021-08-21 18:51:01,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:51:01,255 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:01,255 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] [2021-08-21 18:51:01,281 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-08-21 18:51:01,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-08-21 18:51:01,457 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:51:01,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:01,458 INFO L82 PathProgramCache]: Analyzing trace with hash 2047605533, now seen corresponding path program 11 times [2021-08-21 18:51:01,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:01,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636714863] [2021-08-21 18:51:01,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:01,458 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:01,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:01,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:51:01,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:01,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636714863] [2021-08-21 18:51:01,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636714863] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:01,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526217115] [2021-08-21 18:51:01,518 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:51:01,518 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:01,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:01,518 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:51:01,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-21 18:51:02,409 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:51:02,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:02,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:51:02,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:02,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:51:02,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526217115] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:02,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:02,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:51:02,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613739421] [2021-08-21 18:51:02,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:51:02,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:02,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:51:02,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:02,548 INFO L87 Difference]: Start difference. First operand 1130 states and 2470 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:02,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:02,602 INFO L93 Difference]: Finished difference Result 1289 states and 2716 transitions. [2021-08-21 18:51:02,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:51:02,603 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:51:02,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:02,604 INFO L225 Difference]: With dead ends: 1289 [2021-08-21 18:51:02,604 INFO L226 Difference]: Without dead ends: 1284 [2021-08-21 18:51:02,604 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.6ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:02,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2021-08-21 18:51:02,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 1124. [2021-08-21 18:51:02,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1124 states, 1123 states have (on average 2.186108637577916) internal successors, (2455), 1123 states have internal predecessors, (2455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:02,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 2455 transitions. [2021-08-21 18:51:02,615 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 2455 transitions. Word has length 26 [2021-08-21 18:51:02,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:02,615 INFO L470 AbstractCegarLoop]: Abstraction has 1124 states and 2455 transitions. [2021-08-21 18:51:02,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:02,615 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 2455 transitions. [2021-08-21 18:51:02,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:51:02,616 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:02,616 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] [2021-08-21 18:51:02,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-08-21 18:51:02,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:02,835 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:51:02,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:02,835 INFO L82 PathProgramCache]: Analyzing trace with hash -317805543, now seen corresponding path program 12 times [2021-08-21 18:51:02,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:02,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199269697] [2021-08-21 18:51:02,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:02,836 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:02,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:02,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:51:02,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:02,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199269697] [2021-08-21 18:51:02,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199269697] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:02,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205597744] [2021-08-21 18:51:02,896 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:51:02,896 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:02,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:02,897 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:51:02,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-21 18:51:03,832 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:51:03,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:03,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:51:03,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:03,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:51:03,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205597744] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:03,950 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:03,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:51:03,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591317456] [2021-08-21 18:51:03,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:51:03,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:03,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:51:03,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:03,950 INFO L87 Difference]: Start difference. First operand 1124 states and 2455 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:04,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:04,007 INFO L93 Difference]: Finished difference Result 1268 states and 2683 transitions. [2021-08-21 18:51:04,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:51:04,008 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:51:04,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:04,009 INFO L225 Difference]: With dead ends: 1268 [2021-08-21 18:51:04,009 INFO L226 Difference]: Without dead ends: 1263 [2021-08-21 18:51:04,009 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.8ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:04,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2021-08-21 18:51:04,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 1122. [2021-08-21 18:51:04,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 2.181980374665477) internal successors, (2446), 1121 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:04,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 2446 transitions. [2021-08-21 18:51:04,019 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 2446 transitions. Word has length 26 [2021-08-21 18:51:04,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:04,019 INFO L470 AbstractCegarLoop]: Abstraction has 1122 states and 2446 transitions. [2021-08-21 18:51:04,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:04,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 2446 transitions. [2021-08-21 18:51:04,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:51:04,021 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:04,021 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:04,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-08-21 18:51:04,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:04,239 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:51:04,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:04,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1600681123, now seen corresponding path program 7 times [2021-08-21 18:51:04,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:04,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199609943] [2021-08-21 18:51:04,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:04,240 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:04,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:04,297 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:51:04,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:04,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199609943] [2021-08-21 18:51:04,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199609943] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:04,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103174354] [2021-08-21 18:51:04,298 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:51:04,298 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:04,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:04,299 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:51:04,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-21 18:51:05,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:05,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:51:05,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:05,398 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:51:05,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103174354] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:05,398 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:05,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:51:05,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838368091] [2021-08-21 18:51:05,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:51:05,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:05,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:51:05,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:05,399 INFO L87 Difference]: Start difference. First operand 1122 states and 2446 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:05,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:05,474 INFO L93 Difference]: Finished difference Result 1495 states and 3137 transitions. [2021-08-21 18:51:05,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:51:05,475 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:51:05,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:05,476 INFO L225 Difference]: With dead ends: 1495 [2021-08-21 18:51:05,476 INFO L226 Difference]: Without dead ends: 1462 [2021-08-21 18:51:05,476 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.1ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:05,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2021-08-21 18:51:05,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 1266. [2021-08-21 18:51:05,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1265 states have (on average 2.1644268774703557) internal successors, (2738), 1265 states have internal predecessors, (2738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:05,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 2738 transitions. [2021-08-21 18:51:05,488 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 2738 transitions. Word has length 26 [2021-08-21 18:51:05,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:05,488 INFO L470 AbstractCegarLoop]: Abstraction has 1266 states and 2738 transitions. [2021-08-21 18:51:05,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:05,488 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 2738 transitions. [2021-08-21 18:51:05,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:51:05,490 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:05,497 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] [2021-08-21 18:51:05,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-08-21 18:51:05,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:05,716 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:51:05,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:05,716 INFO L82 PathProgramCache]: Analyzing trace with hash -279369851, now seen corresponding path program 13 times [2021-08-21 18:51:05,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:05,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583044010] [2021-08-21 18:51:05,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:05,717 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:05,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:05,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:51:05,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:05,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583044010] [2021-08-21 18:51:05,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583044010] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:05,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638468399] [2021-08-21 18:51:05,796 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:51:05,796 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:05,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:05,817 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:51:05,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-21 18:51:06,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:06,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:51:06,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:06,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:51:06,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638468399] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:06,972 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:06,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:51:06,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205833805] [2021-08-21 18:51:06,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:51:06,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:06,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:51:06,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:06,973 INFO L87 Difference]: Start difference. First operand 1266 states and 2738 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:07,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:07,034 INFO L93 Difference]: Finished difference Result 1538 states and 3216 transitions. [2021-08-21 18:51:07,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:51:07,034 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:51:07,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:07,036 INFO L225 Difference]: With dead ends: 1538 [2021-08-21 18:51:07,036 INFO L226 Difference]: Without dead ends: 1533 [2021-08-21 18:51:07,036 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.3ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:07,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1533 states. [2021-08-21 18:51:07,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1533 to 1320. [2021-08-21 18:51:07,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1319 states have (on average 2.177407126611069) internal successors, (2872), 1319 states have internal predecessors, (2872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:07,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 2872 transitions. [2021-08-21 18:51:07,049 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 2872 transitions. Word has length 26 [2021-08-21 18:51:07,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:07,049 INFO L470 AbstractCegarLoop]: Abstraction has 1320 states and 2872 transitions. [2021-08-21 18:51:07,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:07,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 2872 transitions. [2021-08-21 18:51:07,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:51:07,051 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:07,051 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:07,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-08-21 18:51:07,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-08-21 18:51:07,264 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:51:07,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:07,265 INFO L82 PathProgramCache]: Analyzing trace with hash -2127273783, now seen corresponding path program 13 times [2021-08-21 18:51:07,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:07,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449028362] [2021-08-21 18:51:07,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:07,265 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:07,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:07,328 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:51:07,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:07,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449028362] [2021-08-21 18:51:07,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449028362] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:07,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190585279] [2021-08-21 18:51:07,328 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:51:07,328 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:07,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:07,329 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:51:07,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-21 18:51:08,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:08,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:51:08,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:08,462 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:51:08,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190585279] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:08,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:08,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:51:08,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607003003] [2021-08-21 18:51:08,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:51:08,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:08,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:51:08,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:08,463 INFO L87 Difference]: Start difference. First operand 1320 states and 2872 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:08,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:08,518 INFO L93 Difference]: Finished difference Result 1600 states and 3341 transitions. [2021-08-21 18:51:08,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:51:08,518 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:51:08,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:08,520 INFO L225 Difference]: With dead ends: 1600 [2021-08-21 18:51:08,520 INFO L226 Difference]: Without dead ends: 1591 [2021-08-21 18:51:08,521 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.6ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:08,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1591 states. [2021-08-21 18:51:08,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1591 to 1367. [2021-08-21 18:51:08,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1367 states, 1366 states have (on average 2.168374816983895) internal successors, (2962), 1366 states have internal predecessors, (2962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:08,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1367 states to 1367 states and 2962 transitions. [2021-08-21 18:51:08,533 INFO L78 Accepts]: Start accepts. Automaton has 1367 states and 2962 transitions. Word has length 26 [2021-08-21 18:51:08,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:08,533 INFO L470 AbstractCegarLoop]: Abstraction has 1367 states and 2962 transitions. [2021-08-21 18:51:08,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:08,533 INFO L276 IsEmpty]: Start isEmpty. Operand 1367 states and 2962 transitions. [2021-08-21 18:51:08,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:51:08,535 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:08,535 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] [2021-08-21 18:51:08,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-08-21 18:51:08,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-08-21 18:51:08,753 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:51:08,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:08,754 INFO L82 PathProgramCache]: Analyzing trace with hash 2050808313, now seen corresponding path program 14 times [2021-08-21 18:51:08,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:08,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400984837] [2021-08-21 18:51:08,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:08,754 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:08,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:08,812 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:51:08,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:08,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400984837] [2021-08-21 18:51:08,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400984837] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:08,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149264104] [2021-08-21 18:51:08,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:51:08,812 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:08,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:08,829 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:51:08,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-21 18:51:09,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:51:09,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:09,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:51:09,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:10,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:51:10,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149264104] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:10,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:10,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:51:10,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057718341] [2021-08-21 18:51:10,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:51:10,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:10,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:51:10,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:10,029 INFO L87 Difference]: Start difference. First operand 1367 states and 2962 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:10,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:10,091 INFO L93 Difference]: Finished difference Result 1591 states and 3331 transitions. [2021-08-21 18:51:10,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:51:10,091 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:51:10,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:10,093 INFO L225 Difference]: With dead ends: 1591 [2021-08-21 18:51:10,093 INFO L226 Difference]: Without dead ends: 1586 [2021-08-21 18:51:10,093 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.8ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:10,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1586 states. [2021-08-21 18:51:10,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1586 to 1393. [2021-08-21 18:51:10,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1393 states, 1392 states have (on average 2.17816091954023) internal successors, (3032), 1392 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:10,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1393 states to 1393 states and 3032 transitions. [2021-08-21 18:51:10,105 INFO L78 Accepts]: Start accepts. Automaton has 1393 states and 3032 transitions. Word has length 26 [2021-08-21 18:51:10,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:10,105 INFO L470 AbstractCegarLoop]: Abstraction has 1393 states and 3032 transitions. [2021-08-21 18:51:10,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:10,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states and 3032 transitions. [2021-08-21 18:51:10,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:51:10,107 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:10,107 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:10,125 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-08-21 18:51:10,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:10,326 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:51:10,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:10,326 INFO L82 PathProgramCache]: Analyzing trace with hash 202904381, now seen corresponding path program 14 times [2021-08-21 18:51:10,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:10,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45046320] [2021-08-21 18:51:10,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:10,326 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:10,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:10,384 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:51:10,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:10,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45046320] [2021-08-21 18:51:10,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45046320] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:10,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978752265] [2021-08-21 18:51:10,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:51:10,385 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:10,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:10,402 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:51:10,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-21 18:51:11,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:51:11,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:11,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:51:11,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:11,598 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:51:11,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978752265] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:11,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:11,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:51:11,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184469495] [2021-08-21 18:51:11,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:51:11,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:11,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:51:11,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:11,599 INFO L87 Difference]: Start difference. First operand 1393 states and 3032 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:11,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:11,656 INFO L93 Difference]: Finished difference Result 1630 states and 3413 transitions. [2021-08-21 18:51:11,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:51:11,656 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:51:11,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:11,658 INFO L225 Difference]: With dead ends: 1630 [2021-08-21 18:51:11,659 INFO L226 Difference]: Without dead ends: 1621 [2021-08-21 18:51:11,659 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.5ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:11,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2021-08-21 18:51:11,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 1414. [2021-08-21 18:51:11,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1414 states, 1413 states have (on average 2.1748053786270347) internal successors, (3073), 1413 states have internal predecessors, (3073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:11,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1414 states to 1414 states and 3073 transitions. [2021-08-21 18:51:11,672 INFO L78 Accepts]: Start accepts. Automaton has 1414 states and 3073 transitions. Word has length 26 [2021-08-21 18:51:11,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:11,673 INFO L470 AbstractCegarLoop]: Abstraction has 1414 states and 3073 transitions. [2021-08-21 18:51:11,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:11,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1414 states and 3073 transitions. [2021-08-21 18:51:11,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:51:11,675 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:11,675 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:11,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-08-21 18:51:11,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:11,894 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:51:11,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:11,894 INFO L82 PathProgramCache]: Analyzing trace with hash -184940475, now seen corresponding path program 15 times [2021-08-21 18:51:11,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:11,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851227762] [2021-08-21 18:51:11,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:11,894 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:11,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:11,962 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:51:11,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:11,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851227762] [2021-08-21 18:51:11,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851227762] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:11,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393013023] [2021-08-21 18:51:11,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:51:11,962 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:11,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:11,963 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:51:11,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-21 18:51:13,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:51:13,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:13,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:51:13,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:13,124 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:51:13,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393013023] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:13,125 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:13,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:51:13,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31055198] [2021-08-21 18:51:13,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:51:13,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:13,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:51:13,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:13,125 INFO L87 Difference]: Start difference. First operand 1414 states and 3073 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:13,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:13,180 INFO L93 Difference]: Finished difference Result 1616 states and 3404 transitions. [2021-08-21 18:51:13,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:51:13,180 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:51:13,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:13,182 INFO L225 Difference]: With dead ends: 1616 [2021-08-21 18:51:13,182 INFO L226 Difference]: Without dead ends: 1611 [2021-08-21 18:51:13,182 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.2ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:13,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2021-08-21 18:51:13,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 1437. [2021-08-21 18:51:13,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1437 states, 1436 states have (on average 2.1740947075208914) internal successors, (3122), 1436 states have internal predecessors, (3122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:13,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1437 states to 1437 states and 3122 transitions. [2021-08-21 18:51:13,194 INFO L78 Accepts]: Start accepts. Automaton has 1437 states and 3122 transitions. Word has length 26 [2021-08-21 18:51:13,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:13,194 INFO L470 AbstractCegarLoop]: Abstraction has 1437 states and 3122 transitions. [2021-08-21 18:51:13,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:13,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1437 states and 3122 transitions. [2021-08-21 18:51:13,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:51:13,196 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:13,196 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:13,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-08-21 18:51:13,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-08-21 18:51:13,405 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:51:13,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:13,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1103643195, now seen corresponding path program 16 times [2021-08-21 18:51:13,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:13,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215278847] [2021-08-21 18:51:13,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:13,405 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:13,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:13,528 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:51:13,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:13,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215278847] [2021-08-21 18:51:13,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215278847] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:13,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920536427] [2021-08-21 18:51:13,529 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:51:13,529 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:13,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:13,530 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:51:13,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-21 18:51:14,593 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:51:14,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:14,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:51:14,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:14,719 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:51:14,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920536427] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:14,719 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:14,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:51:14,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675147460] [2021-08-21 18:51:14,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:51:14,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:14,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:51:14,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:14,720 INFO L87 Difference]: Start difference. First operand 1437 states and 3122 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:14,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:14,775 INFO L93 Difference]: Finished difference Result 1658 states and 3459 transitions. [2021-08-21 18:51:14,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:51:14,775 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:51:14,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:14,777 INFO L225 Difference]: With dead ends: 1658 [2021-08-21 18:51:14,777 INFO L226 Difference]: Without dead ends: 1653 [2021-08-21 18:51:14,777 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.8ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:14,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1653 states. [2021-08-21 18:51:14,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1653 to 1466. [2021-08-21 18:51:14,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1466 states, 1465 states have (on average 2.1754266211604096) internal successors, (3187), 1465 states have internal predecessors, (3187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:14,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1466 states to 1466 states and 3187 transitions. [2021-08-21 18:51:14,791 INFO L78 Accepts]: Start accepts. Automaton has 1466 states and 3187 transitions. Word has length 26 [2021-08-21 18:51:14,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:14,791 INFO L470 AbstractCegarLoop]: Abstraction has 1466 states and 3187 transitions. [2021-08-21 18:51:14,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:14,791 INFO L276 IsEmpty]: Start isEmpty. Operand 1466 states and 3187 transitions. [2021-08-21 18:51:14,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:51:14,793 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:14,793 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] [2021-08-21 18:51:14,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-08-21 18:51:15,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-08-21 18:51:15,007 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:51:15,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:15,007 INFO L82 PathProgramCache]: Analyzing trace with hash -961052599, now seen corresponding path program 15 times [2021-08-21 18:51:15,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:15,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723643800] [2021-08-21 18:51:15,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:15,007 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:15,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:15,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:51:15,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:15,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723643800] [2021-08-21 18:51:15,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723643800] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:15,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130609892] [2021-08-21 18:51:15,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:51:15,070 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:15,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:15,071 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:51:15,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-21 18:51:16,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:51:16,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:16,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:51:16,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:16,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:51:16,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130609892] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:16,255 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:16,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:51:16,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364527394] [2021-08-21 18:51:16,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:51:16,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:16,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:51:16,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:16,255 INFO L87 Difference]: Start difference. First operand 1466 states and 3187 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:16,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:16,312 INFO L93 Difference]: Finished difference Result 1666 states and 3480 transitions. [2021-08-21 18:51:16,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:51:16,312 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:51:16,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:16,314 INFO L225 Difference]: With dead ends: 1666 [2021-08-21 18:51:16,314 INFO L226 Difference]: Without dead ends: 1661 [2021-08-21 18:51:16,314 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.3ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:16,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2021-08-21 18:51:16,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1476. [2021-08-21 18:51:16,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1476 states, 1475 states have (on average 2.1776271186440677) internal successors, (3212), 1475 states have internal predecessors, (3212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:16,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1476 states to 1476 states and 3212 transitions. [2021-08-21 18:51:16,327 INFO L78 Accepts]: Start accepts. Automaton has 1476 states and 3212 transitions. Word has length 26 [2021-08-21 18:51:16,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:16,327 INFO L470 AbstractCegarLoop]: Abstraction has 1476 states and 3212 transitions. [2021-08-21 18:51:16,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:16,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1476 states and 3212 transitions. [2021-08-21 18:51:16,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:51:16,329 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:16,329 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:16,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-08-21 18:51:16,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:16,548 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:51:16,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:16,548 INFO L82 PathProgramCache]: Analyzing trace with hash 183932045, now seen corresponding path program 8 times [2021-08-21 18:51:16,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:16,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163693322] [2021-08-21 18:51:16,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:16,548 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:16,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:16,618 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:51:16,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:16,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163693322] [2021-08-21 18:51:16,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163693322] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:16,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993982239] [2021-08-21 18:51:16,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:51:16,619 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:16,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:16,619 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:51:16,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-21 18:51:17,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:51:17,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:17,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:51:17,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:17,852 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:51:17,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993982239] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:17,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:17,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:51:17,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782094359] [2021-08-21 18:51:17,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:51:17,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:17,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:51:17,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:17,853 INFO L87 Difference]: Start difference. First operand 1476 states and 3212 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:17,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:17,908 INFO L93 Difference]: Finished difference Result 1740 states and 3661 transitions. [2021-08-21 18:51:17,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:51:17,908 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:51:17,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:17,910 INFO L225 Difference]: With dead ends: 1740 [2021-08-21 18:51:17,910 INFO L226 Difference]: Without dead ends: 1731 [2021-08-21 18:51:17,910 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.0ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:17,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1731 states. [2021-08-21 18:51:17,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1731 to 1497. [2021-08-21 18:51:17,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1497 states, 1496 states have (on average 2.175802139037433) internal successors, (3255), 1496 states have internal predecessors, (3255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:17,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1497 states to 1497 states and 3255 transitions. [2021-08-21 18:51:17,923 INFO L78 Accepts]: Start accepts. Automaton has 1497 states and 3255 transitions. Word has length 26 [2021-08-21 18:51:17,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:17,923 INFO L470 AbstractCegarLoop]: Abstraction has 1497 states and 3255 transitions. [2021-08-21 18:51:17,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:17,923 INFO L276 IsEmpty]: Start isEmpty. Operand 1497 states and 3255 transitions. [2021-08-21 18:51:17,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:51:17,925 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:17,925 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:17,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-08-21 18:51:18,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:18,144 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:51:18,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:18,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1391534135, now seen corresponding path program 9 times [2021-08-21 18:51:18,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:18,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058692445] [2021-08-21 18:51:18,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:18,144 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:18,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:18,206 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:51:18,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:18,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058692445] [2021-08-21 18:51:18,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058692445] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:18,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421392767] [2021-08-21 18:51:18,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:51:18,207 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:18,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:18,208 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:51:18,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-21 18:51:19,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:51:19,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:19,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:51:19,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:19,410 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:51:19,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421392767] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:19,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:19,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:51:19,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817857929] [2021-08-21 18:51:19,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:51:19,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:19,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:51:19,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:19,410 INFO L87 Difference]: Start difference. First operand 1497 states and 3255 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:19,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:19,460 INFO L93 Difference]: Finished difference Result 1727 states and 3626 transitions. [2021-08-21 18:51:19,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:51:19,460 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:51:19,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:19,462 INFO L225 Difference]: With dead ends: 1727 [2021-08-21 18:51:19,462 INFO L226 Difference]: Without dead ends: 1722 [2021-08-21 18:51:19,462 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.6ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:19,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1722 states. [2021-08-21 18:51:19,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1722 to 1506. [2021-08-21 18:51:19,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 2.1727574750830563) internal successors, (3270), 1505 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:19,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 3270 transitions. [2021-08-21 18:51:19,475 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 3270 transitions. Word has length 26 [2021-08-21 18:51:19,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:19,475 INFO L470 AbstractCegarLoop]: Abstraction has 1506 states and 3270 transitions. [2021-08-21 18:51:19,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:19,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 3270 transitions. [2021-08-21 18:51:19,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:51:19,477 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:19,477 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] [2021-08-21 18:51:19,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-08-21 18:51:19,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:19,696 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:51:19,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:19,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1649761583, now seen corresponding path program 16 times [2021-08-21 18:51:19,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:19,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639888424] [2021-08-21 18:51:19,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:19,697 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:19,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:19,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:51:19,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:19,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639888424] [2021-08-21 18:51:19,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639888424] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:19,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913709619] [2021-08-21 18:51:19,758 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:51:19,758 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:19,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:19,759 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:51:19,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-21 18:51:20,933 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:51:20,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:20,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:51:20,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:21,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:51:21,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913709619] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:21,049 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:21,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:51:21,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910806688] [2021-08-21 18:51:21,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:51:21,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:21,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:51:21,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:21,050 INFO L87 Difference]: Start difference. First operand 1506 states and 3270 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:21,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:21,112 INFO L93 Difference]: Finished difference Result 1694 states and 3550 transitions. [2021-08-21 18:51:21,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:51:21,113 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:51:21,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:21,115 INFO L225 Difference]: With dead ends: 1694 [2021-08-21 18:51:21,115 INFO L226 Difference]: Without dead ends: 1689 [2021-08-21 18:51:21,115 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.4ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:21,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1689 states. [2021-08-21 18:51:21,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1689 to 1519. [2021-08-21 18:51:21,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1518 states have (on average 2.175889328063241) internal successors, (3303), 1518 states have internal predecessors, (3303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:21,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 3303 transitions. [2021-08-21 18:51:21,128 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 3303 transitions. Word has length 26 [2021-08-21 18:51:21,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:21,129 INFO L470 AbstractCegarLoop]: Abstraction has 1519 states and 3303 transitions. [2021-08-21 18:51:21,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:21,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 3303 transitions. [2021-08-21 18:51:21,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:51:21,130 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:21,130 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:21,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-08-21 18:51:21,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:21,349 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:51:21,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:21,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1709650671, now seen corresponding path program 8 times [2021-08-21 18:51:21,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:21,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923805237] [2021-08-21 18:51:21,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:21,349 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:21,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:21,410 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:51:21,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:21,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923805237] [2021-08-21 18:51:21,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923805237] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:21,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618747308] [2021-08-21 18:51:21,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:51:21,411 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:21,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:21,411 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:51:21,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-21 18:51:22,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:51:22,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:22,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:51:22,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:22,724 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:51:22,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618747308] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:22,724 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:22,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:51:22,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713928952] [2021-08-21 18:51:22,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:51:22,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:22,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:51:22,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:22,725 INFO L87 Difference]: Start difference. First operand 1519 states and 3303 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:22,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:22,783 INFO L93 Difference]: Finished difference Result 1815 states and 3830 transitions. [2021-08-21 18:51:22,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:51:22,783 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:51:22,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:22,785 INFO L225 Difference]: With dead ends: 1815 [2021-08-21 18:51:22,785 INFO L226 Difference]: Without dead ends: 1806 [2021-08-21 18:51:22,785 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.6ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:22,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1806 states. [2021-08-21 18:51:22,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1806 to 1610. [2021-08-21 18:51:22,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1610 states, 1609 states have (on average 2.1578620261031696) internal successors, (3472), 1609 states have internal predecessors, (3472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:22,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1610 states to 1610 states and 3472 transitions. [2021-08-21 18:51:22,800 INFO L78 Accepts]: Start accepts. Automaton has 1610 states and 3472 transitions. Word has length 26 [2021-08-21 18:51:22,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:22,800 INFO L470 AbstractCegarLoop]: Abstraction has 1610 states and 3472 transitions. [2021-08-21 18:51:22,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:22,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1610 states and 3472 transitions. [2021-08-21 18:51:22,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:51:22,802 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:22,802 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:22,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-08-21 18:51:23,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-08-21 18:51:23,017 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:51:23,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:23,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1009850445, now seen corresponding path program 9 times [2021-08-21 18:51:23,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:23,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145629651] [2021-08-21 18:51:23,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:23,018 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:23,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:23,102 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:51:23,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:23,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145629651] [2021-08-21 18:51:23,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145629651] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:23,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115370666] [2021-08-21 18:51:23,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:51:23,103 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:23,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:23,125 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:51:23,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-21 18:51:24,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:51:24,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:24,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:51:24,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:24,330 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:51:24,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115370666] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:24,330 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:24,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:51:24,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141662221] [2021-08-21 18:51:24,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:51:24,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:24,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:51:24,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:24,332 INFO L87 Difference]: Start difference. First operand 1610 states and 3472 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:24,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:24,382 INFO L93 Difference]: Finished difference Result 1839 states and 3847 transitions. [2021-08-21 18:51:24,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:51:24,382 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:51:24,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:24,384 INFO L225 Difference]: With dead ends: 1839 [2021-08-21 18:51:24,384 INFO L226 Difference]: Without dead ends: 1834 [2021-08-21 18:51:24,384 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.8ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:24,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1834 states. [2021-08-21 18:51:24,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1834 to 1656. [2021-08-21 18:51:24,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1655 states have (on average 2.1522658610271903) internal successors, (3562), 1655 states have internal predecessors, (3562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:24,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 3562 transitions. [2021-08-21 18:51:24,405 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 3562 transitions. Word has length 26 [2021-08-21 18:51:24,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:24,405 INFO L470 AbstractCegarLoop]: Abstraction has 1656 states and 3562 transitions. [2021-08-21 18:51:24,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:24,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 3562 transitions. [2021-08-21 18:51:24,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:51:24,407 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:24,407 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:24,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-08-21 18:51:24,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:24,621 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:51:24,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:24,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1951605555, now seen corresponding path program 13 times [2021-08-21 18:51:24,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:24,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063546738] [2021-08-21 18:51:24,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:24,621 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:24,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:24,705 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:51:24,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:24,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063546738] [2021-08-21 18:51:24,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063546738] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:24,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032691919] [2021-08-21 18:51:24,705 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:51:24,705 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:24,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:24,706 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:51:24,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-21 18:51:25,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:25,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:51:25,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:26,029 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:51:26,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032691919] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:26,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:26,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:51:26,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817317999] [2021-08-21 18:51:26,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:51:26,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:26,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:51:26,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:26,030 INFO L87 Difference]: Start difference. First operand 1656 states and 3562 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:26,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:26,090 INFO L93 Difference]: Finished difference Result 1911 states and 4016 transitions. [2021-08-21 18:51:26,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:51:26,090 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:51:26,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:26,092 INFO L225 Difference]: With dead ends: 1911 [2021-08-21 18:51:26,092 INFO L226 Difference]: Without dead ends: 1906 [2021-08-21 18:51:26,093 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.3ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:26,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1906 states. [2021-08-21 18:51:26,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1906 to 1693. [2021-08-21 18:51:26,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1693 states, 1692 states have (on average 2.16903073286052) internal successors, (3670), 1692 states have internal predecessors, (3670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:26,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1693 states to 1693 states and 3670 transitions. [2021-08-21 18:51:26,109 INFO L78 Accepts]: Start accepts. Automaton has 1693 states and 3670 transitions. Word has length 26 [2021-08-21 18:51:26,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:26,109 INFO L470 AbstractCegarLoop]: Abstraction has 1693 states and 3670 transitions. [2021-08-21 18:51:26,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:26,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1693 states and 3670 transitions. [2021-08-21 18:51:26,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:51:26,111 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:26,111 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] [2021-08-21 18:51:26,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-08-21 18:51:26,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:26,330 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:51:26,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:26,330 INFO L82 PathProgramCache]: Analyzing trace with hash 495457809, now seen corresponding path program 17 times [2021-08-21 18:51:26,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:26,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942824889] [2021-08-21 18:51:26,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:26,330 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:26,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:26,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:51:26,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:26,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942824889] [2021-08-21 18:51:26,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942824889] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:26,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712475685] [2021-08-21 18:51:26,415 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:51:26,415 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:26,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:26,431 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:51:26,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-21 18:51:27,636 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:51:27,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:27,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:51:27,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:27,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:51:27,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712475685] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:27,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:27,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:51:27,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710233521] [2021-08-21 18:51:27,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:51:27,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:27,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:51:27,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:27,775 INFO L87 Difference]: Start difference. First operand 1693 states and 3670 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:27,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:27,839 INFO L93 Difference]: Finished difference Result 1948 states and 4095 transitions. [2021-08-21 18:51:27,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:51:27,839 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:51:27,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:27,841 INFO L225 Difference]: With dead ends: 1948 [2021-08-21 18:51:27,841 INFO L226 Difference]: Without dead ends: 1939 [2021-08-21 18:51:27,842 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.2ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:27,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1939 states. [2021-08-21 18:51:27,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1939 to 1714. [2021-08-21 18:51:27,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1714 states, 1713 states have (on average 2.170461179217747) internal successors, (3718), 1713 states have internal predecessors, (3718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:27,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1714 states to 1714 states and 3718 transitions. [2021-08-21 18:51:27,857 INFO L78 Accepts]: Start accepts. Automaton has 1714 states and 3718 transitions. Word has length 26 [2021-08-21 18:51:27,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:27,857 INFO L470 AbstractCegarLoop]: Abstraction has 1714 states and 3718 transitions. [2021-08-21 18:51:27,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:27,857 INFO L276 IsEmpty]: Start isEmpty. Operand 1714 states and 3718 transitions. [2021-08-21 18:51:27,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:51:27,859 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:27,859 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] [2021-08-21 18:51:27,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-08-21 18:51:28,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:28,073 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:51:28,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:28,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1205973291, now seen corresponding path program 18 times [2021-08-21 18:51:28,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:28,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479307917] [2021-08-21 18:51:28,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:28,075 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:28,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:28,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:51:28,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:28,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479307917] [2021-08-21 18:51:28,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479307917] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:28,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162493603] [2021-08-21 18:51:28,159 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:51:28,159 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:28,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:28,159 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:51:28,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-21 18:51:29,370 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:51:29,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:29,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:51:29,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:29,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:51:29,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162493603] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:29,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:29,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:51:29,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000732191] [2021-08-21 18:51:29,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:51:29,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:29,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:51:29,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:29,523 INFO L87 Difference]: Start difference. First operand 1714 states and 3718 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:29,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:29,586 INFO L93 Difference]: Finished difference Result 1925 states and 4075 transitions. [2021-08-21 18:51:29,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:51:29,586 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:51:29,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:29,589 INFO L225 Difference]: With dead ends: 1925 [2021-08-21 18:51:29,589 INFO L226 Difference]: Without dead ends: 1920 [2021-08-21 18:51:29,589 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.5ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:29,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2021-08-21 18:51:29,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 1740. [2021-08-21 18:51:29,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1740 states, 1739 states have (on average 2.1702127659574466) internal successors, (3774), 1739 states have internal predecessors, (3774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:29,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1740 states to 1740 states and 3774 transitions. [2021-08-21 18:51:29,607 INFO L78 Accepts]: Start accepts. Automaton has 1740 states and 3774 transitions. Word has length 26 [2021-08-21 18:51:29,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:29,607 INFO L470 AbstractCegarLoop]: Abstraction has 1740 states and 3774 transitions. [2021-08-21 18:51:29,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:29,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1740 states and 3774 transitions. [2021-08-21 18:51:29,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:51:29,609 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:29,609 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] [2021-08-21 18:51:29,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-08-21 18:51:29,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-08-21 18:51:29,828 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:51:29,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:29,828 INFO L82 PathProgramCache]: Analyzing trace with hash 723582929, now seen corresponding path program 19 times [2021-08-21 18:51:29,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:29,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992800947] [2021-08-21 18:51:29,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:29,829 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:29,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:29,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:51:29,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:29,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992800947] [2021-08-21 18:51:29,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992800947] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:29,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729645681] [2021-08-21 18:51:29,916 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:51:29,916 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:29,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:29,917 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:51:29,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-21 18:51:31,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:31,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:51:31,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:31,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:51:31,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729645681] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:31,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:31,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:51:31,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871342615] [2021-08-21 18:51:31,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:51:31,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:31,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:51:31,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:31,231 INFO L87 Difference]: Start difference. First operand 1740 states and 3774 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:31,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:31,293 INFO L93 Difference]: Finished difference Result 1927 states and 4092 transitions. [2021-08-21 18:51:31,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:51:31,293 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:51:31,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:31,295 INFO L225 Difference]: With dead ends: 1927 [2021-08-21 18:51:31,295 INFO L226 Difference]: Without dead ends: 1922 [2021-08-21 18:51:31,296 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.4ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:31,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1922 states. [2021-08-21 18:51:31,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1922 to 1760. [2021-08-21 18:51:31,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1760 states, 1759 states have (on average 2.173962478681069) internal successors, (3824), 1759 states have internal predecessors, (3824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:31,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1760 states to 1760 states and 3824 transitions. [2021-08-21 18:51:31,311 INFO L78 Accepts]: Start accepts. Automaton has 1760 states and 3824 transitions. Word has length 26 [2021-08-21 18:51:31,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:31,312 INFO L470 AbstractCegarLoop]: Abstraction has 1760 states and 3824 transitions. [2021-08-21 18:51:31,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:31,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1760 states and 3824 transitions. [2021-08-21 18:51:31,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:51:31,314 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:31,314 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:31,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-08-21 18:51:31,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:31,533 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:51:31,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:31,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1910422097, now seen corresponding path program 14 times [2021-08-21 18:51:31,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:31,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064936332] [2021-08-21 18:51:31,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:31,533 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:31,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:31,592 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:51:31,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:31,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064936332] [2021-08-21 18:51:31,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064936332] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:31,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233575863] [2021-08-21 18:51:31,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:51:31,593 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:31,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:31,593 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:51:31,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-21 18:51:32,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:51:32,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:32,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:51:32,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:32,989 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:51:32,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233575863] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:32,990 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:32,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:51:32,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092282900] [2021-08-21 18:51:32,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:51:32,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:32,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:51:32,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:32,990 INFO L87 Difference]: Start difference. First operand 1760 states and 3824 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:33,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:33,052 INFO L93 Difference]: Finished difference Result 1979 states and 4189 transitions. [2021-08-21 18:51:33,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:51:33,053 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:51:33,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:33,055 INFO L225 Difference]: With dead ends: 1979 [2021-08-21 18:51:33,055 INFO L226 Difference]: Without dead ends: 1974 [2021-08-21 18:51:33,055 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.9ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:33,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1974 states. [2021-08-21 18:51:33,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1974 to 1779. [2021-08-21 18:51:33,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1779 states, 1778 states have (on average 2.1833520809898763) internal successors, (3882), 1778 states have internal predecessors, (3882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:33,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1779 states to 1779 states and 3882 transitions. [2021-08-21 18:51:33,070 INFO L78 Accepts]: Start accepts. Automaton has 1779 states and 3882 transitions. Word has length 26 [2021-08-21 18:51:33,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:33,070 INFO L470 AbstractCegarLoop]: Abstraction has 1779 states and 3882 transitions. [2021-08-21 18:51:33,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:33,070 INFO L276 IsEmpty]: Start isEmpty. Operand 1779 states and 3882 transitions. [2021-08-21 18:51:33,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:51:33,072 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:33,072 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] [2021-08-21 18:51:33,091 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2021-08-21 18:51:33,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:33,291 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:51:33,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:33,291 INFO L82 PathProgramCache]: Analyzing trace with hash 62518165, now seen corresponding path program 20 times [2021-08-21 18:51:33,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:33,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344663516] [2021-08-21 18:51:33,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:33,291 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:33,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:33,351 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:51:33,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:33,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344663516] [2021-08-21 18:51:33,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344663516] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:33,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204210448] [2021-08-21 18:51:33,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:51:33,352 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:33,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:33,353 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:51:33,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-21 18:51:34,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:51:34,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:34,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:51:34,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:34,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:51:34,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204210448] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:34,745 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:34,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:51:34,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898555858] [2021-08-21 18:51:34,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:51:34,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:34,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:51:34,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:34,746 INFO L87 Difference]: Start difference. First operand 1779 states and 3882 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:34,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:34,808 INFO L93 Difference]: Finished difference Result 2006 states and 4248 transitions. [2021-08-21 18:51:34,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:51:34,808 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:51:34,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:34,810 INFO L225 Difference]: With dead ends: 2006 [2021-08-21 18:51:34,810 INFO L226 Difference]: Without dead ends: 1997 [2021-08-21 18:51:34,810 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.8ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:34,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1997 states. [2021-08-21 18:51:34,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1997 to 1789. [2021-08-21 18:51:34,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1789 states, 1788 states have (on average 2.1840044742729305) internal successors, (3905), 1788 states have internal predecessors, (3905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:34,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1789 states to 1789 states and 3905 transitions. [2021-08-21 18:51:34,826 INFO L78 Accepts]: Start accepts. Automaton has 1789 states and 3905 transitions. Word has length 26 [2021-08-21 18:51:34,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:34,826 INFO L470 AbstractCegarLoop]: Abstraction has 1789 states and 3905 transitions. [2021-08-21 18:51:34,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:34,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1789 states and 3905 transitions. [2021-08-21 18:51:34,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:51:34,828 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:34,828 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:34,847 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2021-08-21 18:51:35,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:35,047 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:51:35,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:35,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1911206357, now seen corresponding path program 15 times [2021-08-21 18:51:35,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:35,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886810330] [2021-08-21 18:51:35,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:35,048 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:35,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:35,116 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:51:35,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:35,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886810330] [2021-08-21 18:51:35,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886810330] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:35,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771325972] [2021-08-21 18:51:35,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:51:35,116 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:35,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:35,117 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:51:35,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-21 18:51:36,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:51:36,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:36,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:51:36,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:36,466 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:51:36,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771325972] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:36,467 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:36,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:51:36,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119872106] [2021-08-21 18:51:36,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:51:36,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:36,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:51:36,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:36,467 INFO L87 Difference]: Start difference. First operand 1789 states and 3905 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:36,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:36,534 INFO L93 Difference]: Finished difference Result 1972 states and 4204 transitions. [2021-08-21 18:51:36,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:51:36,534 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:51:36,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:36,537 INFO L225 Difference]: With dead ends: 1972 [2021-08-21 18:51:36,537 INFO L226 Difference]: Without dead ends: 1967 [2021-08-21 18:51:36,537 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.8ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:36,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2021-08-21 18:51:36,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1800. [2021-08-21 18:51:36,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1800 states, 1799 states have (on average 2.1878821567537523) internal successors, (3936), 1799 states have internal predecessors, (3936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:36,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 3936 transitions. [2021-08-21 18:51:36,554 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 3936 transitions. Word has length 26 [2021-08-21 18:51:36,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:36,554 INFO L470 AbstractCegarLoop]: Abstraction has 1800 states and 3936 transitions. [2021-08-21 18:51:36,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:36,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 3936 transitions. [2021-08-21 18:51:36,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:51:36,556 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:36,556 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] [2021-08-21 18:51:36,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2021-08-21 18:51:36,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:36,772 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:51:36,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:36,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1638912935, now seen corresponding path program 21 times [2021-08-21 18:51:36,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:36,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130059265] [2021-08-21 18:51:36,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:36,773 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:36,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:36,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:51:36,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:36,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130059265] [2021-08-21 18:51:36,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130059265] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:36,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156348177] [2021-08-21 18:51:36,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:51:36,850 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:36,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:36,852 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:51:36,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-21 18:51:38,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:51:38,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:38,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:51:38,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:38,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:51:38,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156348177] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:38,281 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:38,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:51:38,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776345216] [2021-08-21 18:51:38,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:51:38,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:38,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:51:38,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:38,282 INFO L87 Difference]: Start difference. First operand 1800 states and 3936 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:38,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:38,347 INFO L93 Difference]: Finished difference Result 1993 states and 4246 transitions. [2021-08-21 18:51:38,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:51:38,347 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:51:38,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:38,349 INFO L225 Difference]: With dead ends: 1993 [2021-08-21 18:51:38,349 INFO L226 Difference]: Without dead ends: 1988 [2021-08-21 18:51:38,349 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.0ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:38,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1988 states. [2021-08-21 18:51:38,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1988 to 1811. [2021-08-21 18:51:38,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1811 states, 1810 states have (on average 2.1895027624309393) internal successors, (3963), 1810 states have internal predecessors, (3963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:38,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1811 states to 1811 states and 3963 transitions. [2021-08-21 18:51:38,368 INFO L78 Accepts]: Start accepts. Automaton has 1811 states and 3963 transitions. Word has length 26 [2021-08-21 18:51:38,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:38,368 INFO L470 AbstractCegarLoop]: Abstraction has 1811 states and 3963 transitions. [2021-08-21 18:51:38,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:38,368 INFO L276 IsEmpty]: Start isEmpty. Operand 1811 states and 3963 transitions. [2021-08-21 18:51:38,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:51:38,371 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:38,371 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] [2021-08-21 18:51:38,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-08-21 18:51:38,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:38,590 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:51:38,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:38,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1161246925, now seen corresponding path program 22 times [2021-08-21 18:51:38,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:38,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952006743] [2021-08-21 18:51:38,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:38,590 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:38,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:38,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:51:38,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:38,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952006743] [2021-08-21 18:51:38,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952006743] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:38,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570980687] [2021-08-21 18:51:38,654 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:51:38,654 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:38,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:38,655 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:51:38,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-21 18:51:39,888 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:51:39,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:39,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:51:39,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:40,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:51:40,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570980687] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:40,015 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:40,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:51:40,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858489584] [2021-08-21 18:51:40,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:51:40,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:40,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:51:40,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:40,015 INFO L87 Difference]: Start difference. First operand 1811 states and 3963 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:40,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:40,085 INFO L93 Difference]: Finished difference Result 1987 states and 4246 transitions. [2021-08-21 18:51:40,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:51:40,085 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:51:40,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:40,087 INFO L225 Difference]: With dead ends: 1987 [2021-08-21 18:51:40,087 INFO L226 Difference]: Without dead ends: 1982 [2021-08-21 18:51:40,088 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.6ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:40,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1982 states. [2021-08-21 18:51:40,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1982 to 1822. [2021-08-21 18:51:40,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1822 states, 1821 states have (on average 2.191103789126853) internal successors, (3990), 1821 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:40,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 3990 transitions. [2021-08-21 18:51:40,104 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 3990 transitions. Word has length 26 [2021-08-21 18:51:40,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:40,104 INFO L470 AbstractCegarLoop]: Abstraction has 1822 states and 3990 transitions. [2021-08-21 18:51:40,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:40,104 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 3990 transitions. [2021-08-21 18:51:40,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:51:40,106 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:40,106 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] [2021-08-21 18:51:40,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-08-21 18:51:40,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:40,325 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:51:40,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:40,326 INFO L82 PathProgramCache]: Analyzing trace with hash 847947601, now seen corresponding path program 23 times [2021-08-21 18:51:40,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:40,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193082542] [2021-08-21 18:51:40,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:40,326 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:40,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:40,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:51:40,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:40,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193082542] [2021-08-21 18:51:40,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193082542] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:40,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721899083] [2021-08-21 18:51:40,389 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:51:40,389 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:40,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:40,390 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:51:40,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-21 18:51:41,625 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:51:41,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:41,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:51:41,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:41,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:51:41,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721899083] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:41,752 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:41,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:51:41,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121476218] [2021-08-21 18:51:41,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:51:41,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:41,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:51:41,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:41,752 INFO L87 Difference]: Start difference. First operand 1822 states and 3990 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:41,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:41,817 INFO L93 Difference]: Finished difference Result 1985 states and 4252 transitions. [2021-08-21 18:51:41,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:51:41,817 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:51:41,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:41,820 INFO L225 Difference]: With dead ends: 1985 [2021-08-21 18:51:41,820 INFO L226 Difference]: Without dead ends: 1980 [2021-08-21 18:51:41,820 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.0ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:41,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1980 states. [2021-08-21 18:51:41,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1980 to 1831. [2021-08-21 18:51:41,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1831 states, 1830 states have (on average 2.1939890710382515) internal successors, (4015), 1830 states have internal predecessors, (4015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:41,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1831 states to 1831 states and 4015 transitions. [2021-08-21 18:51:41,861 INFO L78 Accepts]: Start accepts. Automaton has 1831 states and 4015 transitions. Word has length 26 [2021-08-21 18:51:41,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:41,861 INFO L470 AbstractCegarLoop]: Abstraction has 1831 states and 4015 transitions. [2021-08-21 18:51:41,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:41,861 INFO L276 IsEmpty]: Start isEmpty. Operand 1831 states and 4015 transitions. [2021-08-21 18:51:41,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:51:41,863 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:41,863 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] [2021-08-21 18:51:41,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-08-21 18:51:42,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-08-21 18:51:42,077 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:51:42,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:42,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1572386215, now seen corresponding path program 24 times [2021-08-21 18:51:42,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:42,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587767411] [2021-08-21 18:51:42,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:42,077 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:42,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:42,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:51:42,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:42,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587767411] [2021-08-21 18:51:42,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587767411] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:42,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972642700] [2021-08-21 18:51:42,159 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:51:42,160 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:42,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:42,173 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:51:42,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-21 18:51:43,589 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:51:43,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:43,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:51:43,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:43,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:51:43,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972642700] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:43,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:43,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:51:43,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191108609] [2021-08-21 18:51:43,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:51:43,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:43,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:51:43,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:43,739 INFO L87 Difference]: Start difference. First operand 1831 states and 4015 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:43,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:43,804 INFO L93 Difference]: Finished difference Result 2027 states and 4331 transitions. [2021-08-21 18:51:43,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:51:43,804 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:51:43,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:43,806 INFO L225 Difference]: With dead ends: 2027 [2021-08-21 18:51:43,806 INFO L226 Difference]: Without dead ends: 2022 [2021-08-21 18:51:43,806 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.9ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:43,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2022 states. [2021-08-21 18:51:43,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2022 to 1842. [2021-08-21 18:51:43,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1842 states, 1841 states have (on average 2.1966322650733296) internal successors, (4044), 1841 states have internal predecessors, (4044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:43,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1842 states to 1842 states and 4044 transitions. [2021-08-21 18:51:43,822 INFO L78 Accepts]: Start accepts. Automaton has 1842 states and 4044 transitions. Word has length 26 [2021-08-21 18:51:43,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:43,822 INFO L470 AbstractCegarLoop]: Abstraction has 1842 states and 4044 transitions. [2021-08-21 18:51:43,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:43,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1842 states and 4044 transitions. [2021-08-21 18:51:43,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:51:43,824 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:43,824 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:43,844 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2021-08-21 18:51:44,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:44,044 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:51:44,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:44,044 INFO L82 PathProgramCache]: Analyzing trace with hash -196550827, now seen corresponding path program 16 times [2021-08-21 18:51:44,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:44,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046731747] [2021-08-21 18:51:44,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:44,044 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:44,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:44,104 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:51:44,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:44,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046731747] [2021-08-21 18:51:44,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046731747] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:44,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902411002] [2021-08-21 18:51:44,105 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:51:44,105 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:44,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:44,105 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:51:44,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-21 18:51:45,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:51:45,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:45,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:51:45,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:45,661 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:51:45,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902411002] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:45,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:45,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:51:45,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909570830] [2021-08-21 18:51:45,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:51:45,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:45,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:51:45,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:45,662 INFO L87 Difference]: Start difference. First operand 1842 states and 4044 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:45,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:45,720 INFO L93 Difference]: Finished difference Result 2044 states and 4340 transitions. [2021-08-21 18:51:45,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:51:45,721 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:51:45,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:45,723 INFO L225 Difference]: With dead ends: 2044 [2021-08-21 18:51:45,723 INFO L226 Difference]: Without dead ends: 2039 [2021-08-21 18:51:45,723 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.8ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:45,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2039 states. [2021-08-21 18:51:45,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2039 to 1852. [2021-08-21 18:51:45,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1852 states, 1851 states have (on average 2.19935170178282) internal successors, (4071), 1851 states have internal predecessors, (4071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:45,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 4071 transitions. [2021-08-21 18:51:45,739 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 4071 transitions. Word has length 26 [2021-08-21 18:51:45,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:45,739 INFO L470 AbstractCegarLoop]: Abstraction has 1852 states and 4071 transitions. [2021-08-21 18:51:45,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:45,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 4071 transitions. [2021-08-21 18:51:45,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:51:45,741 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:45,741 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:45,761 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2021-08-21 18:51:45,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:45,957 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:51:45,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:45,957 INFO L82 PathProgramCache]: Analyzing trace with hash 948433817, now seen corresponding path program 10 times [2021-08-21 18:51:45,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:45,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486369011] [2021-08-21 18:51:45,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:45,957 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:45,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:46,015 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:51:46,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:46,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486369011] [2021-08-21 18:51:46,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486369011] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:46,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734083032] [2021-08-21 18:51:46,015 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:51:46,016 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:46,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:46,016 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:51:46,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-21 18:51:47,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:51:47,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:47,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:51:47,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:47,468 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:51:47,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734083032] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:47,468 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:47,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:51:47,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523855212] [2021-08-21 18:51:47,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:51:47,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:47,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:51:47,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:47,469 INFO L87 Difference]: Start difference. First operand 1852 states and 4071 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:47,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:47,521 INFO L93 Difference]: Finished difference Result 2114 states and 4515 transitions. [2021-08-21 18:51:47,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:51:47,522 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:51:47,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:47,524 INFO L225 Difference]: With dead ends: 2114 [2021-08-21 18:51:47,524 INFO L226 Difference]: Without dead ends: 2105 [2021-08-21 18:51:47,524 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.3ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:47,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2105 states. [2021-08-21 18:51:47,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2105 to 1873. [2021-08-21 18:51:47,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1873 states, 1872 states have (on average 2.198717948717949) internal successors, (4116), 1872 states have internal predecessors, (4116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:47,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 4116 transitions. [2021-08-21 18:51:47,540 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 4116 transitions. Word has length 26 [2021-08-21 18:51:47,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:47,540 INFO L470 AbstractCegarLoop]: Abstraction has 1873 states and 4116 transitions. [2021-08-21 18:51:47,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:47,541 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 4116 transitions. [2021-08-21 18:51:47,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:51:47,542 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:47,543 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:47,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-08-21 18:51:47,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-08-21 18:51:47,757 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:51:47,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:47,757 INFO L82 PathProgramCache]: Analyzing trace with hash -627032363, now seen corresponding path program 11 times [2021-08-21 18:51:47,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:47,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114640816] [2021-08-21 18:51:47,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:47,757 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:47,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:47,817 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:51:47,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:47,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114640816] [2021-08-21 18:51:47,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114640816] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:47,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156715679] [2021-08-21 18:51:47,837 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:51:47,837 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:47,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:47,850 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:51:47,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-21 18:51:49,271 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:51:49,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:49,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:51:49,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:49,396 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:51:49,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156715679] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:49,396 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:49,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:51:49,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462687748] [2021-08-21 18:51:49,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:51:49,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:49,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:51:49,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:49,397 INFO L87 Difference]: Start difference. First operand 1873 states and 4116 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:49,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:49,452 INFO L93 Difference]: Finished difference Result 2105 states and 4488 transitions. [2021-08-21 18:51:49,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:51:49,453 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:51:49,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:49,455 INFO L225 Difference]: With dead ends: 2105 [2021-08-21 18:51:49,455 INFO L226 Difference]: Without dead ends: 2100 [2021-08-21 18:51:49,455 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.1ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:49,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2100 states. [2021-08-21 18:51:49,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2100 to 1882. [2021-08-21 18:51:49,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1882 states, 1881 states have (on average 2.1972355130249865) internal successors, (4133), 1881 states have internal predecessors, (4133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:49,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 4133 transitions. [2021-08-21 18:51:49,472 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 4133 transitions. Word has length 26 [2021-08-21 18:51:49,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:49,472 INFO L470 AbstractCegarLoop]: Abstraction has 1882 states and 4133 transitions. [2021-08-21 18:51:49,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:49,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 4133 transitions. [2021-08-21 18:51:49,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:51:49,475 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:49,475 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:49,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-08-21 18:51:49,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:49,691 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:51:49,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:49,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1938707635, now seen corresponding path program 12 times [2021-08-21 18:51:49,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:49,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341112423] [2021-08-21 18:51:49,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:49,692 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:49,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:49,755 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:51:49,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:49,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341112423] [2021-08-21 18:51:49,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341112423] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:49,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068882335] [2021-08-21 18:51:49,755 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:51:49,755 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:49,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:49,757 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:51:49,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-21 18:51:51,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:51:51,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:51,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:51:51,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:51,348 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:51:51,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068882335] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:51,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:51,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:51:51,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428956745] [2021-08-21 18:51:51,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:51:51,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:51,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:51:51,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:51,349 INFO L87 Difference]: Start difference. First operand 1882 states and 4133 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:51,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:51,405 INFO L93 Difference]: Finished difference Result 2119 states and 4526 transitions. [2021-08-21 18:51:51,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:51:51,405 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:51:51,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:51,408 INFO L225 Difference]: With dead ends: 2119 [2021-08-21 18:51:51,408 INFO L226 Difference]: Without dead ends: 2114 [2021-08-21 18:51:51,408 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.1ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:51,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2114 states. [2021-08-21 18:51:51,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2114 to 1896. [2021-08-21 18:51:51,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1896 states, 1895 states have (on average 2.198416886543536) internal successors, (4166), 1895 states have internal predecessors, (4166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:51,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 4166 transitions. [2021-08-21 18:51:51,425 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 4166 transitions. Word has length 26 [2021-08-21 18:51:51,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:51,425 INFO L470 AbstractCegarLoop]: Abstraction has 1896 states and 4166 transitions. [2021-08-21 18:51:51,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:51,426 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 4166 transitions. [2021-08-21 18:51:51,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:51:51,428 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:51,428 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:51,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-08-21 18:51:51,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:51,644 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:51:51,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:51,644 INFO L82 PathProgramCache]: Analyzing trace with hash 508355729, now seen corresponding path program 13 times [2021-08-21 18:51:51,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:51,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122693053] [2021-08-21 18:51:51,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:51,645 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:51,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:51,731 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:51:51,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:51,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122693053] [2021-08-21 18:51:51,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122693053] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:51,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511002752] [2021-08-21 18:51:51,731 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:51:51,731 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:51,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:51,732 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:51:51,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-21 18:51:53,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:53,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:51:53,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:53,155 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:51:53,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511002752] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:53,155 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:53,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:51:53,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451285211] [2021-08-21 18:51:53,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:51:53,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:53,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:51:53,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:53,156 INFO L87 Difference]: Start difference. First operand 1896 states and 4166 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:53,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:53,208 INFO L93 Difference]: Finished difference Result 2148 states and 4587 transitions. [2021-08-21 18:51:53,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:51:53,212 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:51:53,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:53,216 INFO L225 Difference]: With dead ends: 2148 [2021-08-21 18:51:53,216 INFO L226 Difference]: Without dead ends: 2139 [2021-08-21 18:51:53,216 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.2ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:53,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2139 states. [2021-08-21 18:51:53,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2139 to 1908. [2021-08-21 18:51:53,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1908 states, 1907 states have (on average 2.1955951756685894) internal successors, (4187), 1907 states have internal predecessors, (4187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:53,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1908 states to 1908 states and 4187 transitions. [2021-08-21 18:51:53,241 INFO L78 Accepts]: Start accepts. Automaton has 1908 states and 4187 transitions. Word has length 26 [2021-08-21 18:51:53,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:53,241 INFO L470 AbstractCegarLoop]: Abstraction has 1908 states and 4187 transitions. [2021-08-21 18:51:53,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:53,241 INFO L276 IsEmpty]: Start isEmpty. Operand 1908 states and 4187 transitions. [2021-08-21 18:51:53,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:51:53,244 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:53,244 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:53,265 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2021-08-21 18:51:53,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-08-21 18:51:53,465 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:51:53,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:53,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1923320017, now seen corresponding path program 14 times [2021-08-21 18:51:53,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:53,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800389107] [2021-08-21 18:51:53,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:53,465 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:53,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:53,576 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:51:53,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:53,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800389107] [2021-08-21 18:51:53,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800389107] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:53,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665538949] [2021-08-21 18:51:53,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:51:53,577 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:53,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:53,578 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:51:53,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-21 18:51:55,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:51:55,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:55,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:51:55,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:55,168 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:51:55,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665538949] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:55,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:55,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:51:55,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741164031] [2021-08-21 18:51:55,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:51:55,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:55,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:51:55,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:55,169 INFO L87 Difference]: Start difference. First operand 1908 states and 4187 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:55,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:55,226 INFO L93 Difference]: Finished difference Result 2118 states and 4534 transitions. [2021-08-21 18:51:55,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:51:55,227 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:51:55,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:55,229 INFO L225 Difference]: With dead ends: 2118 [2021-08-21 18:51:55,229 INFO L226 Difference]: Without dead ends: 2113 [2021-08-21 18:51:55,229 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.8ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:55,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2113 states. [2021-08-21 18:51:55,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2113 to 1920. [2021-08-21 18:51:55,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1920 states, 1919 states have (on average 2.198019801980198) internal successors, (4218), 1919 states have internal predecessors, (4218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:55,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1920 states to 1920 states and 4218 transitions. [2021-08-21 18:51:55,246 INFO L78 Accepts]: Start accepts. Automaton has 1920 states and 4218 transitions. Word has length 26 [2021-08-21 18:51:55,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:55,246 INFO L470 AbstractCegarLoop]: Abstraction has 1920 states and 4218 transitions. [2021-08-21 18:51:55,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:55,246 INFO L276 IsEmpty]: Start isEmpty. Operand 1920 states and 4218 transitions. [2021-08-21 18:51:55,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:51:55,248 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:55,249 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:55,270 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2021-08-21 18:51:55,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-08-21 18:51:55,469 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:51:55,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:55,469 INFO L82 PathProgramCache]: Analyzing trace with hash 75416085, now seen corresponding path program 15 times [2021-08-21 18:51:55,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:55,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750299713] [2021-08-21 18:51:55,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:55,469 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:55,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:55,529 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:51:55,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:55,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750299713] [2021-08-21 18:51:55,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750299713] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:55,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573645388] [2021-08-21 18:51:55,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:51:55,530 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:55,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:55,531 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:51:55,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-21 18:51:57,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:51:57,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:57,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:51:57,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:57,154 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:51:57,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573645388] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:57,154 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:57,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:51:57,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503642931] [2021-08-21 18:51:57,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:51:57,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:57,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:51:57,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:57,155 INFO L87 Difference]: Start difference. First operand 1920 states and 4218 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:57,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:57,210 INFO L93 Difference]: Finished difference Result 2142 states and 4585 transitions. [2021-08-21 18:51:57,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:51:57,210 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:51:57,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:57,212 INFO L225 Difference]: With dead ends: 2142 [2021-08-21 18:51:57,212 INFO L226 Difference]: Without dead ends: 2133 [2021-08-21 18:51:57,212 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.1ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:57,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2133 states. [2021-08-21 18:51:57,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2133 to 1930. [2021-08-21 18:51:57,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1930 states, 1929 states have (on average 2.1964748574390875) internal successors, (4237), 1929 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:57,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 4237 transitions. [2021-08-21 18:51:57,230 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 4237 transitions. Word has length 26 [2021-08-21 18:51:57,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:57,230 INFO L470 AbstractCegarLoop]: Abstraction has 1930 states and 4237 transitions. [2021-08-21 18:51:57,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:57,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 4237 transitions. [2021-08-21 18:51:57,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:51:57,232 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:57,232 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:57,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2021-08-21 18:51:57,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:57,452 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:51:57,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:57,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1626015015, now seen corresponding path program 16 times [2021-08-21 18:51:57,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:57,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98758741] [2021-08-21 18:51:57,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:57,453 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:57,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:57,518 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:51:57,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:57,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98758741] [2021-08-21 18:51:57,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98758741] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:57,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786084167] [2021-08-21 18:51:57,518 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:51:57,518 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:57,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:57,532 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:51:57,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-21 18:51:59,041 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:51:59,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:59,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:51:59,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:59,175 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:51:59,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786084167] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:59,176 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:59,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:51:59,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788205247] [2021-08-21 18:51:59,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:51:59,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:59,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:51:59,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:59,176 INFO L87 Difference]: Start difference. First operand 1930 states and 4237 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:59,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:59,237 INFO L93 Difference]: Finished difference Result 2116 states and 4547 transitions. [2021-08-21 18:51:59,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:51:59,237 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:51:59,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:59,239 INFO L225 Difference]: With dead ends: 2116 [2021-08-21 18:51:59,239 INFO L226 Difference]: Without dead ends: 2111 [2021-08-21 18:51:59,239 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.2ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:51:59,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2111 states. [2021-08-21 18:51:59,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2111 to 1941. [2021-08-21 18:51:59,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1941 states, 1940 states have (on average 2.195876288659794) internal successors, (4260), 1940 states have internal predecessors, (4260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:59,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1941 states to 1941 states and 4260 transitions. [2021-08-21 18:51:59,256 INFO L78 Accepts]: Start accepts. Automaton has 1941 states and 4260 transitions. Word has length 26 [2021-08-21 18:51:59,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:59,257 INFO L470 AbstractCegarLoop]: Abstraction has 1941 states and 4260 transitions. [2021-08-21 18:51:59,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:59,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1941 states and 4260 transitions. [2021-08-21 18:51:59,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:51:59,259 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:59,259 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:59,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2021-08-21 18:51:59,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-08-21 18:51:59,477 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:51:59,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:59,477 INFO L82 PathProgramCache]: Analyzing trace with hash -956982123, now seen corresponding path program 10 times [2021-08-21 18:51:59,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:59,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761029190] [2021-08-21 18:51:59,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:59,477 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:59,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:59,539 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:51:59,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:59,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761029190] [2021-08-21 18:51:59,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761029190] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:59,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361896638] [2021-08-21 18:51:59,539 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:51:59,539 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:59,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:59,540 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:51:59,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-21 18:52:01,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:52:01,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:01,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:52:01,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:01,165 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:52:01,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361896638] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:01,165 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:01,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:52:01,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422815378] [2021-08-21 18:52:01,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:52:01,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:01,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:52:01,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:52:01,166 INFO L87 Difference]: Start difference. First operand 1941 states and 4260 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:01,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:01,220 INFO L93 Difference]: Finished difference Result 2201 states and 4732 transitions. [2021-08-21 18:52:01,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:52:01,220 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:52:01,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:01,222 INFO L225 Difference]: With dead ends: 2201 [2021-08-21 18:52:01,223 INFO L226 Difference]: Without dead ends: 2192 [2021-08-21 18:52:01,223 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.7ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:52:01,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2192 states. [2021-08-21 18:52:01,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2192 to 1996. [2021-08-21 18:52:01,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1996 states, 1995 states have (on average 2.194987468671679) internal successors, (4379), 1995 states have internal predecessors, (4379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:01,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1996 states to 1996 states and 4379 transitions. [2021-08-21 18:52:01,240 INFO L78 Accepts]: Start accepts. Automaton has 1996 states and 4379 transitions. Word has length 26 [2021-08-21 18:52:01,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:01,240 INFO L470 AbstractCegarLoop]: Abstraction has 1996 states and 4379 transitions. [2021-08-21 18:52:01,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:01,241 INFO L276 IsEmpty]: Start isEmpty. Operand 1996 states and 4379 transitions. [2021-08-21 18:52:01,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:52:01,243 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:01,243 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:01,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-08-21 18:52:01,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-08-21 18:52:01,462 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:52:01,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:01,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1762518993, now seen corresponding path program 11 times [2021-08-21 18:52:01,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:01,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261836875] [2021-08-21 18:52:01,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:01,463 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:01,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:01,522 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:01,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:01,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261836875] [2021-08-21 18:52:01,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261836875] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:01,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158057377] [2021-08-21 18:52:01,523 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:52:01,523 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:01,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:01,523 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:52:01,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-21 18:52:03,003 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:52:03,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:03,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:52:03,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:03,121 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:03,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158057377] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:03,121 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:03,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:52:03,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204541117] [2021-08-21 18:52:03,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:52:03,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:03,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:52:03,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:52:03,122 INFO L87 Difference]: Start difference. First operand 1996 states and 4379 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:03,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:03,181 INFO L93 Difference]: Finished difference Result 2207 states and 4722 transitions. [2021-08-21 18:52:03,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:52:03,182 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:52:03,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:03,185 INFO L225 Difference]: With dead ends: 2207 [2021-08-21 18:52:03,185 INFO L226 Difference]: Without dead ends: 2202 [2021-08-21 18:52:03,185 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.9ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:52:03,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2202 states. [2021-08-21 18:52:03,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2202 to 2031. [2021-08-21 18:52:03,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 2030 states have (on average 2.1940886699507387) internal successors, (4454), 2030 states have internal predecessors, (4454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:03,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 4454 transitions. [2021-08-21 18:52:03,231 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 4454 transitions. Word has length 26 [2021-08-21 18:52:03,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:03,231 INFO L470 AbstractCegarLoop]: Abstraction has 2031 states and 4454 transitions. [2021-08-21 18:52:03,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:03,231 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 4454 transitions. [2021-08-21 18:52:03,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:52:03,233 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:03,233 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:03,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2021-08-21 18:52:03,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-08-21 18:52:03,454 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:52:03,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:03,454 INFO L82 PathProgramCache]: Analyzing trace with hash -665609711, now seen corresponding path program 12 times [2021-08-21 18:52:03,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:03,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486217493] [2021-08-21 18:52:03,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:03,454 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:03,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:03,513 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:03,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:03,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486217493] [2021-08-21 18:52:03,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486217493] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:03,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60850926] [2021-08-21 18:52:03,513 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:52:03,513 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:03,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:03,514 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:52:03,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-21 18:52:05,080 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:52:05,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:05,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:52:05,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:05,215 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:05,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60850926] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:05,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:05,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:52:05,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510730796] [2021-08-21 18:52:05,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:52:05,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:05,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:52:05,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:52:05,216 INFO L87 Difference]: Start difference. First operand 2031 states and 4454 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:05,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:05,278 INFO L93 Difference]: Finished difference Result 2269 states and 4847 transitions. [2021-08-21 18:52:05,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:52:05,279 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:52:05,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:05,281 INFO L225 Difference]: With dead ends: 2269 [2021-08-21 18:52:05,281 INFO L226 Difference]: Without dead ends: 2264 [2021-08-21 18:52:05,282 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.8ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:52:05,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-08-21 18:52:05,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 2061. [2021-08-21 18:52:05,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2061 states, 2060 states have (on average 2.19126213592233) internal successors, (4514), 2060 states have internal predecessors, (4514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:05,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2061 states to 2061 states and 4514 transitions. [2021-08-21 18:52:05,302 INFO L78 Accepts]: Start accepts. Automaton has 2061 states and 4514 transitions. Word has length 26 [2021-08-21 18:52:05,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:05,303 INFO L470 AbstractCegarLoop]: Abstraction has 2061 states and 4514 transitions. [2021-08-21 18:52:05,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:05,303 INFO L276 IsEmpty]: Start isEmpty. Operand 2061 states and 4514 transitions. [2021-08-21 18:52:05,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:52:05,305 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:05,305 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:05,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2021-08-21 18:52:05,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:05,513 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:52:05,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:05,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1781453653, now seen corresponding path program 13 times [2021-08-21 18:52:05,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:05,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645868107] [2021-08-21 18:52:05,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:05,513 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:05,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:05,596 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:05,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:05,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645868107] [2021-08-21 18:52:05,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645868107] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:05,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279877739] [2021-08-21 18:52:05,597 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:52:05,597 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:05,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:05,597 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:52:05,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-21 18:52:07,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:07,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:52:07,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:07,335 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:07,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279877739] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:07,336 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:07,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:52:07,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107460643] [2021-08-21 18:52:07,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:52:07,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:07,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:52:07,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:52:07,336 INFO L87 Difference]: Start difference. First operand 2061 states and 4514 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:07,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:07,388 INFO L93 Difference]: Finished difference Result 2343 states and 5001 transitions. [2021-08-21 18:52:07,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:52:07,388 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:52:07,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:07,390 INFO L225 Difference]: With dead ends: 2343 [2021-08-21 18:52:07,390 INFO L226 Difference]: Without dead ends: 2334 [2021-08-21 18:52:07,390 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.8ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:52:07,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2334 states. [2021-08-21 18:52:07,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2334 to 2126. [2021-08-21 18:52:07,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2126 states, 2125 states have (on average 2.1816470588235295) internal successors, (4636), 2125 states have internal predecessors, (4636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:07,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2126 states to 2126 states and 4636 transitions. [2021-08-21 18:52:07,409 INFO L78 Accepts]: Start accepts. Automaton has 2126 states and 4636 transitions. Word has length 26 [2021-08-21 18:52:07,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:07,409 INFO L470 AbstractCegarLoop]: Abstraction has 2126 states and 4636 transitions. [2021-08-21 18:52:07,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:07,409 INFO L276 IsEmpty]: Start isEmpty. Operand 2126 states and 4636 transitions. [2021-08-21 18:52:07,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:52:07,412 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:07,412 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:07,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2021-08-21 18:52:07,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:07,631 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:52:07,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:07,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1787954163, now seen corresponding path program 14 times [2021-08-21 18:52:07,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:07,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915460108] [2021-08-21 18:52:07,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:07,632 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:07,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:07,691 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:07,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:07,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915460108] [2021-08-21 18:52:07,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915460108] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:07,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930652319] [2021-08-21 18:52:07,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:52:07,692 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:07,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:07,693 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:52:07,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-21 18:52:09,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:52:09,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:09,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:52:09,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:09,404 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:09,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930652319] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:09,405 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:09,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:52:09,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513143279] [2021-08-21 18:52:09,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:52:09,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:09,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:52:09,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:52:09,407 INFO L87 Difference]: Start difference. First operand 2126 states and 4636 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:09,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:09,463 INFO L93 Difference]: Finished difference Result 2335 states and 4978 transitions. [2021-08-21 18:52:09,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:52:09,463 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:52:09,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:09,466 INFO L225 Difference]: With dead ends: 2335 [2021-08-21 18:52:09,466 INFO L226 Difference]: Without dead ends: 2330 [2021-08-21 18:52:09,466 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.6ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:52:09,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2330 states. [2021-08-21 18:52:09,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2330 to 2155. [2021-08-21 18:52:09,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2155 states, 2154 states have (on average 2.1829155060352834) internal successors, (4702), 2154 states have internal predecessors, (4702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:09,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2155 states to 2155 states and 4702 transitions. [2021-08-21 18:52:09,484 INFO L78 Accepts]: Start accepts. Automaton has 2155 states and 4702 transitions. Word has length 26 [2021-08-21 18:52:09,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:09,485 INFO L470 AbstractCegarLoop]: Abstraction has 2155 states and 4702 transitions. [2021-08-21 18:52:09,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:09,485 INFO L276 IsEmpty]: Start isEmpty. Operand 2155 states and 4702 transitions. [2021-08-21 18:52:09,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:52:09,487 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:09,487 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:09,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-08-21 18:52:09,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:09,707 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:52:09,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:09,708 INFO L82 PathProgramCache]: Analyzing trace with hash 659109201, now seen corresponding path program 15 times [2021-08-21 18:52:09,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:09,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715044459] [2021-08-21 18:52:09,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:09,708 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:09,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:09,770 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:09,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:09,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715044459] [2021-08-21 18:52:09,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715044459] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:09,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803288740] [2021-08-21 18:52:09,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:52:09,771 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:09,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:09,772 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:52:09,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-21 18:52:11,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:52:11,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:11,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:52:11,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:11,521 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:11,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803288740] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:11,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:11,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:52:11,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583718435] [2021-08-21 18:52:11,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:52:11,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:11,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:52:11,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:52:11,522 INFO L87 Difference]: Start difference. First operand 2155 states and 4702 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:11,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:11,575 INFO L93 Difference]: Finished difference Result 2371 states and 5062 transitions. [2021-08-21 18:52:11,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:52:11,575 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:52:11,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:11,578 INFO L225 Difference]: With dead ends: 2371 [2021-08-21 18:52:11,578 INFO L226 Difference]: Without dead ends: 2362 [2021-08-21 18:52:11,578 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.1ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:52:11,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2362 states. [2021-08-21 18:52:11,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2362 to 2184. [2021-08-21 18:52:11,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2184 states, 2183 states have (on average 2.1800274851122308) internal successors, (4759), 2183 states have internal predecessors, (4759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:11,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2184 states to 2184 states and 4759 transitions. [2021-08-21 18:52:11,597 INFO L78 Accepts]: Start accepts. Automaton has 2184 states and 4759 transitions. Word has length 26 [2021-08-21 18:52:11,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:11,597 INFO L470 AbstractCegarLoop]: Abstraction has 2184 states and 4759 transitions. [2021-08-21 18:52:11,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:11,597 INFO L276 IsEmpty]: Start isEmpty. Operand 2184 states and 4759 transitions. [2021-08-21 18:52:11,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:52:11,599 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:11,599 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:11,620 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2021-08-21 18:52:11,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-08-21 18:52:11,820 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:52:11,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:11,820 INFO L82 PathProgramCache]: Analyzing trace with hash 2044607821, now seen corresponding path program 16 times [2021-08-21 18:52:11,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:11,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372891657] [2021-08-21 18:52:11,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:11,820 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:11,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:11,879 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:52:11,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:11,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372891657] [2021-08-21 18:52:11,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372891657] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:11,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445019899] [2021-08-21 18:52:11,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:52:11,880 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:11,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:11,880 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:52:11,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-21 18:52:13,506 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:52:13,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:13,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:52:13,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:13,630 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:52:13,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445019899] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:13,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:13,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:52:13,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667235721] [2021-08-21 18:52:13,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:52:13,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:13,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:52:13,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:52:13,631 INFO L87 Difference]: Start difference. First operand 2184 states and 4759 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:13,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:13,685 INFO L93 Difference]: Finished difference Result 2378 states and 5078 transitions. [2021-08-21 18:52:13,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:52:13,685 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:52:13,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:13,688 INFO L225 Difference]: With dead ends: 2378 [2021-08-21 18:52:13,688 INFO L226 Difference]: Without dead ends: 2373 [2021-08-21 18:52:13,688 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.9ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:52:13,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2373 states. [2021-08-21 18:52:13,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2373 to 2206. [2021-08-21 18:52:13,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2206 states, 2205 states have (on average 2.17687074829932) internal successors, (4800), 2205 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:13,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2206 states to 2206 states and 4800 transitions. [2021-08-21 18:52:13,706 INFO L78 Accepts]: Start accepts. Automaton has 2206 states and 4800 transitions. Word has length 26 [2021-08-21 18:52:13,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:13,707 INFO L470 AbstractCegarLoop]: Abstraction has 2206 states and 4800 transitions. [2021-08-21 18:52:13,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:13,707 INFO L276 IsEmpty]: Start isEmpty. Operand 2206 states and 4800 transitions. [2021-08-21 18:52:13,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:13,709 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:13,709 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:52:13,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-08-21 18:52:13,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2021-08-21 18:52:13,929 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:52:13,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:13,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1745160069, now seen corresponding path program 25 times [2021-08-21 18:52:13,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:13,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484660414] [2021-08-21 18:52:13,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:13,929 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:13,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:14,003 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:52:14,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:14,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484660414] [2021-08-21 18:52:14,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484660414] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:14,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125646131] [2021-08-21 18:52:14,003 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:52:14,003 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:14,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:14,004 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:52:14,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-21 18:52:15,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:15,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:52:15,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:15,728 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:52:15,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125646131] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:15,728 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:15,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:52:15,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496704099] [2021-08-21 18:52:15,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:52:15,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:15,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:52:15,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:52:15,729 INFO L87 Difference]: Start difference. First operand 2206 states and 4800 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:52:15,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:15,796 INFO L93 Difference]: Finished difference Result 2417 states and 5120 transitions. [2021-08-21 18:52:15,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:52:15,796 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:52:15,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:15,799 INFO L225 Difference]: With dead ends: 2417 [2021-08-21 18:52:15,799 INFO L226 Difference]: Without dead ends: 2384 [2021-08-21 18:52:15,799 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.5ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:52:15,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2384 states. [2021-08-21 18:52:15,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2384 to 2090. [2021-08-21 18:52:15,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2090 states, 2089 states have (on average 2.192915270464337) internal successors, (4581), 2089 states have internal predecessors, (4581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:15,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2090 states to 2090 states and 4581 transitions. [2021-08-21 18:52:15,817 INFO L78 Accepts]: Start accepts. Automaton has 2090 states and 4581 transitions. Word has length 29 [2021-08-21 18:52:15,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:15,817 INFO L470 AbstractCegarLoop]: Abstraction has 2090 states and 4581 transitions. [2021-08-21 18:52:15,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:52:15,817 INFO L276 IsEmpty]: Start isEmpty. Operand 2090 states and 4581 transitions. [2021-08-21 18:52:15,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:15,819 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:15,819 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:52:15,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2021-08-21 18:52:16,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-08-21 18:52:16,039 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:52:16,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:16,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1636190521, now seen corresponding path program 26 times [2021-08-21 18:52:16,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:16,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234047631] [2021-08-21 18:52:16,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:16,040 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:16,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:16,110 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:52:16,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:16,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234047631] [2021-08-21 18:52:16,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234047631] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:16,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223848293] [2021-08-21 18:52:16,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:52:16,111 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:16,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:16,112 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:52:16,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-08-21 18:52:17,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:52:17,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:17,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:52:17,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:17,890 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:52:17,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223848293] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:17,891 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:17,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:52:17,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377239496] [2021-08-21 18:52:17,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:52:17,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:17,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:52:17,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:52:17,891 INFO L87 Difference]: Start difference. First operand 2090 states and 4581 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:52:17,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:17,958 INFO L93 Difference]: Finished difference Result 2361 states and 5008 transitions. [2021-08-21 18:52:17,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:52:17,958 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:52:17,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:17,961 INFO L225 Difference]: With dead ends: 2361 [2021-08-21 18:52:17,961 INFO L226 Difference]: Without dead ends: 2352 [2021-08-21 18:52:17,961 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.3ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:52:17,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2352 states. [2021-08-21 18:52:17,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2352 to 2098. [2021-08-21 18:52:17,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2098 states, 2097 states have (on average 2.1826418693371483) internal successors, (4577), 2097 states have internal predecessors, (4577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:17,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2098 states to 2098 states and 4577 transitions. [2021-08-21 18:52:17,980 INFO L78 Accepts]: Start accepts. Automaton has 2098 states and 4577 transitions. Word has length 29 [2021-08-21 18:52:17,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:17,980 INFO L470 AbstractCegarLoop]: Abstraction has 2098 states and 4577 transitions. [2021-08-21 18:52:17,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:52:17,980 INFO L276 IsEmpty]: Start isEmpty. Operand 2098 states and 4577 transitions. [2021-08-21 18:52:17,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:17,982 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:17,982 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:52:18,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2021-08-21 18:52:18,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:18,202 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:52:18,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:18,202 INFO L82 PathProgramCache]: Analyzing trace with hash 60724341, now seen corresponding path program 27 times [2021-08-21 18:52:18,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:18,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540657684] [2021-08-21 18:52:18,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:18,203 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:18,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:18,274 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:52:18,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:18,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540657684] [2021-08-21 18:52:18,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540657684] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:18,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888353663] [2021-08-21 18:52:18,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:52:18,274 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:18,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:18,275 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:52:18,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-08-21 18:52:19,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:52:19,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:19,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:52:19,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:20,088 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:52:20,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888353663] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:20,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:20,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:52:20,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428321456] [2021-08-21 18:52:20,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:52:20,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:20,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:52:20,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:52:20,089 INFO L87 Difference]: Start difference. First operand 2098 states and 4577 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:52:20,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:20,160 INFO L93 Difference]: Finished difference Result 2410 states and 5063 transitions. [2021-08-21 18:52:20,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:52:20,160 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:52:20,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:20,163 INFO L225 Difference]: With dead ends: 2410 [2021-08-21 18:52:20,163 INFO L226 Difference]: Without dead ends: 2405 [2021-08-21 18:52:20,163 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.7ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:52:20,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2405 states. [2021-08-21 18:52:20,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2405 to 2174. [2021-08-21 18:52:20,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2174 states, 2173 states have (on average 2.1813161527841696) internal successors, (4740), 2173 states have internal predecessors, (4740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:20,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2174 states to 2174 states and 4740 transitions. [2021-08-21 18:52:20,182 INFO L78 Accepts]: Start accepts. Automaton has 2174 states and 4740 transitions. Word has length 29 [2021-08-21 18:52:20,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:20,182 INFO L470 AbstractCegarLoop]: Abstraction has 2174 states and 4740 transitions. [2021-08-21 18:52:20,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:52:20,183 INFO L276 IsEmpty]: Start isEmpty. Operand 2174 states and 4740 transitions. [2021-08-21 18:52:20,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:20,185 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:20,185 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:52:20,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2021-08-21 18:52:20,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-08-21 18:52:20,405 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:52:20,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:20,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1906108227, now seen corresponding path program 28 times [2021-08-21 18:52:20,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:20,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413259263] [2021-08-21 18:52:20,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:20,406 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:20,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:20,484 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:52:20,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:20,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413259263] [2021-08-21 18:52:20,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413259263] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:20,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922396967] [2021-08-21 18:52:20,484 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:52:20,484 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:20,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:20,485 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:52:20,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-08-21 18:52:22,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:52:22,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:22,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:52:22,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:22,308 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:52:22,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922396967] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:22,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:22,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:52:22,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470206912] [2021-08-21 18:52:22,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:52:22,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:22,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:52:22,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:52:22,309 INFO L87 Difference]: Start difference. First operand 2174 states and 4740 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:52:22,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:22,407 INFO L93 Difference]: Finished difference Result 2405 states and 5066 transitions. [2021-08-21 18:52:22,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:52:22,408 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:52:22,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:22,410 INFO L225 Difference]: With dead ends: 2405 [2021-08-21 18:52:22,410 INFO L226 Difference]: Without dead ends: 2396 [2021-08-21 18:52:22,410 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.6ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:52:22,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2396 states. [2021-08-21 18:52:22,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2396 to 2092. [2021-08-21 18:52:22,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2092 states, 2091 states have (on average 2.1836441893830703) internal successors, (4566), 2091 states have internal predecessors, (4566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:22,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 4566 transitions. [2021-08-21 18:52:22,429 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 4566 transitions. Word has length 29 [2021-08-21 18:52:22,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:22,429 INFO L470 AbstractCegarLoop]: Abstraction has 2092 states and 4566 transitions. [2021-08-21 18:52:22,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:52:22,429 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 4566 transitions. [2021-08-21 18:52:22,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:22,431 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:22,431 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:52:22,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2021-08-21 18:52:22,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-08-21 18:52:22,634 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:52:22,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:22,634 INFO L82 PathProgramCache]: Analyzing trace with hash 813392889, now seen corresponding path program 29 times [2021-08-21 18:52:22,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:22,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047149165] [2021-08-21 18:52:22,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:22,634 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:22,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:22,712 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:52:22,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:22,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047149165] [2021-08-21 18:52:22,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047149165] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:22,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167324956] [2021-08-21 18:52:22,712 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:52:22,712 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:22,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:22,713 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:52:22,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-08-21 18:52:24,434 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:52:24,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:24,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:52:24,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:24,569 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:52:24,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167324956] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:24,569 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:24,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:52:24,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981468527] [2021-08-21 18:52:24,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:52:24,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:24,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:52:24,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:52:24,570 INFO L87 Difference]: Start difference. First operand 2092 states and 4566 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:52:24,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:24,645 INFO L93 Difference]: Finished difference Result 2353 states and 4954 transitions. [2021-08-21 18:52:24,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:52:24,645 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:52:24,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:24,648 INFO L225 Difference]: With dead ends: 2353 [2021-08-21 18:52:24,648 INFO L226 Difference]: Without dead ends: 2348 [2021-08-21 18:52:24,648 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.1ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:52:24,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2348 states. [2021-08-21 18:52:24,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2348 to 2107. [2021-08-21 18:52:24,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2107 states, 2106 states have (on average 2.1899335232668564) internal successors, (4612), 2106 states have internal predecessors, (4612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:24,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2107 states to 2107 states and 4612 transitions. [2021-08-21 18:52:24,671 INFO L78 Accepts]: Start accepts. Automaton has 2107 states and 4612 transitions. Word has length 29 [2021-08-21 18:52:24,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:24,671 INFO L470 AbstractCegarLoop]: Abstraction has 2107 states and 4612 transitions. [2021-08-21 18:52:24,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:52:24,672 INFO L276 IsEmpty]: Start isEmpty. Operand 2107 states and 4612 transitions. [2021-08-21 18:52:24,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:24,674 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:24,674 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:52:24,700 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2021-08-21 18:52:24,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:24,900 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:52:24,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:24,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1614735815, now seen corresponding path program 30 times [2021-08-21 18:52:24,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:24,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865737084] [2021-08-21 18:52:24,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:24,900 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:24,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:24,973 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:52:24,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:24,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865737084] [2021-08-21 18:52:24,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865737084] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:24,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140602548] [2021-08-21 18:52:24,973 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:52:24,973 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:24,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:24,974 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:52:24,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-08-21 18:52:26,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:52:26,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:26,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:52:26,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:26,846 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:52:26,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140602548] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:26,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:26,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:52:26,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194580259] [2021-08-21 18:52:26,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:52:26,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:26,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:52:26,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:52:26,847 INFO L87 Difference]: Start difference. First operand 2107 states and 4612 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:52:26,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:26,922 INFO L93 Difference]: Finished difference Result 2347 states and 4937 transitions. [2021-08-21 18:52:26,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:52:26,922 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:52:26,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:26,925 INFO L225 Difference]: With dead ends: 2347 [2021-08-21 18:52:26,925 INFO L226 Difference]: Without dead ends: 2342 [2021-08-21 18:52:26,925 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.1ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:52:26,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2342 states. [2021-08-21 18:52:26,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2342 to 2070. [2021-08-21 18:52:26,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2070 states, 2069 states have (on average 2.1894635089415178) internal successors, (4530), 2069 states have internal predecessors, (4530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:26,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2070 states to 2070 states and 4530 transitions. [2021-08-21 18:52:26,945 INFO L78 Accepts]: Start accepts. Automaton has 2070 states and 4530 transitions. Word has length 29 [2021-08-21 18:52:26,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:26,945 INFO L470 AbstractCegarLoop]: Abstraction has 2070 states and 4530 transitions. [2021-08-21 18:52:26,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:52:26,945 INFO L276 IsEmpty]: Start isEmpty. Operand 2070 states and 4530 transitions. [2021-08-21 18:52:26,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:26,947 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:26,947 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:52:26,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2021-08-21 18:52:27,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:27,168 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:52:27,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:27,168 INFO L82 PathProgramCache]: Analyzing trace with hash 832327549, now seen corresponding path program 31 times [2021-08-21 18:52:27,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:27,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156013437] [2021-08-21 18:52:27,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:27,168 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:27,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:27,240 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:52:27,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:27,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156013437] [2021-08-21 18:52:27,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156013437] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:27,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086648250] [2021-08-21 18:52:27,241 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:52:27,241 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:27,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:27,242 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:52:27,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-08-21 18:52:29,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:29,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:52:29,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:29,152 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:52:29,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086648250] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:29,152 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:29,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:52:29,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594158132] [2021-08-21 18:52:29,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:52:29,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:29,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:52:29,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:52:29,153 INFO L87 Difference]: Start difference. First operand 2070 states and 4530 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:52:29,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:29,225 INFO L93 Difference]: Finished difference Result 2413 states and 5108 transitions. [2021-08-21 18:52:29,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:52:29,225 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:52:29,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:29,228 INFO L225 Difference]: With dead ends: 2413 [2021-08-21 18:52:29,228 INFO L226 Difference]: Without dead ends: 2404 [2021-08-21 18:52:29,228 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.8ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:52:29,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2021-08-21 18:52:29,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 2153. [2021-08-21 18:52:29,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2153 states, 2152 states have (on average 2.1863382899628254) internal successors, (4705), 2152 states have internal predecessors, (4705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:29,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 4705 transitions. [2021-08-21 18:52:29,247 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 4705 transitions. Word has length 29 [2021-08-21 18:52:29,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:29,247 INFO L470 AbstractCegarLoop]: Abstraction has 2153 states and 4705 transitions. [2021-08-21 18:52:29,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:52:29,247 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 4705 transitions. [2021-08-21 18:52:29,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:29,249 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:29,249 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:52:29,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2021-08-21 18:52:29,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-08-21 18:52:29,470 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:52:29,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:29,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1557887029, now seen corresponding path program 32 times [2021-08-21 18:52:29,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:29,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228371568] [2021-08-21 18:52:29,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:29,470 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:29,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:29,554 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:52:29,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:29,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228371568] [2021-08-21 18:52:29,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228371568] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:29,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647971494] [2021-08-21 18:52:29,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:52:29,554 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:29,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:29,555 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:52:29,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-08-21 18:52:31,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:52:31,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:31,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:52:31,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:31,498 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:52:31,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647971494] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:31,498 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:31,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:52:31,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938160619] [2021-08-21 18:52:31,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:52:31,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:31,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:52:31,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:52:31,499 INFO L87 Difference]: Start difference. First operand 2153 states and 4705 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:52:31,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:31,579 INFO L93 Difference]: Finished difference Result 2386 states and 5019 transitions. [2021-08-21 18:52:31,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:52:31,579 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:52:31,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:31,582 INFO L225 Difference]: With dead ends: 2386 [2021-08-21 18:52:31,582 INFO L226 Difference]: Without dead ends: 2381 [2021-08-21 18:52:31,582 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.7ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:52:31,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2381 states. [2021-08-21 18:52:31,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2381 to 2108. [2021-08-21 18:52:31,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2108 states, 2107 states have (on average 2.178452776459421) internal successors, (4590), 2107 states have internal predecessors, (4590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:31,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2108 states to 2108 states and 4590 transitions. [2021-08-21 18:52:31,601 INFO L78 Accepts]: Start accepts. Automaton has 2108 states and 4590 transitions. Word has length 29 [2021-08-21 18:52:31,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:31,601 INFO L470 AbstractCegarLoop]: Abstraction has 2108 states and 4590 transitions. [2021-08-21 18:52:31,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:52:31,601 INFO L276 IsEmpty]: Start isEmpty. Operand 2108 states and 4590 transitions. [2021-08-21 18:52:31,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:31,604 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:31,604 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:52:31,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2021-08-21 18:52:31,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:31,825 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:52:31,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:31,825 INFO L82 PathProgramCache]: Analyzing trace with hash -290016903, now seen corresponding path program 33 times [2021-08-21 18:52:31,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:31,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974571825] [2021-08-21 18:52:31,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:31,826 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:31,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:31,915 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:52:31,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:31,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974571825] [2021-08-21 18:52:31,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974571825] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:31,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046318710] [2021-08-21 18:52:31,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:52:31,916 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:31,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:31,917 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:52:31,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-08-21 18:52:33,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:52:33,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:33,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:52:33,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:33,810 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:52:33,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046318710] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:33,811 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:33,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:52:33,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709431928] [2021-08-21 18:52:33,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:52:33,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:33,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:52:33,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:52:33,811 INFO L87 Difference]: Start difference. First operand 2108 states and 4590 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:52:33,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:33,884 INFO L93 Difference]: Finished difference Result 2358 states and 4980 transitions. [2021-08-21 18:52:33,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:52:33,884 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:52:33,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:33,886 INFO L225 Difference]: With dead ends: 2358 [2021-08-21 18:52:33,887 INFO L226 Difference]: Without dead ends: 2349 [2021-08-21 18:52:33,887 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.2ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:52:33,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2349 states. [2021-08-21 18:52:33,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2349 to 2097. [2021-08-21 18:52:33,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2097 states, 2096 states have (on average 2.18368320610687) internal successors, (4577), 2096 states have internal predecessors, (4577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:33,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2097 states to 2097 states and 4577 transitions. [2021-08-21 18:52:33,904 INFO L78 Accepts]: Start accepts. Automaton has 2097 states and 4577 transitions. Word has length 29 [2021-08-21 18:52:33,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:33,904 INFO L470 AbstractCegarLoop]: Abstraction has 2097 states and 4577 transitions. [2021-08-21 18:52:33,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:52:33,905 INFO L276 IsEmpty]: Start isEmpty. Operand 2097 states and 4577 transitions. [2021-08-21 18:52:33,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:33,907 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:33,907 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:52:33,927 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2021-08-21 18:52:34,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:34,127 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:52:34,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:34,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1095481717, now seen corresponding path program 34 times [2021-08-21 18:52:34,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:34,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484317996] [2021-08-21 18:52:34,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:34,128 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:34,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:34,267 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:34,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:34,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484317996] [2021-08-21 18:52:34,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484317996] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:34,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660706300] [2021-08-21 18:52:34,267 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:52:34,267 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:34,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:34,268 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:52:34,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-08-21 18:52:36,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:52:36,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:36,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:52:36,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:36,256 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:36,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660706300] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:36,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:36,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:52:36,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622791253] [2021-08-21 18:52:36,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:52:36,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:36,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:52:36,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:52:36,257 INFO L87 Difference]: Start difference. First operand 2097 states and 4577 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:52:36,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:36,340 INFO L93 Difference]: Finished difference Result 2300 states and 4879 transitions. [2021-08-21 18:52:36,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:52:36,340 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:52:36,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:36,343 INFO L225 Difference]: With dead ends: 2300 [2021-08-21 18:52:36,343 INFO L226 Difference]: Without dead ends: 2295 [2021-08-21 18:52:36,343 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.1ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:52:36,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2295 states. [2021-08-21 18:52:36,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2295 to 2037. [2021-08-21 18:52:36,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2037 states, 2036 states have (on average 2.1719056974459723) internal successors, (4422), 2036 states have internal predecessors, (4422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:36,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2037 states to 2037 states and 4422 transitions. [2021-08-21 18:52:36,361 INFO L78 Accepts]: Start accepts. Automaton has 2037 states and 4422 transitions. Word has length 29 [2021-08-21 18:52:36,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:36,361 INFO L470 AbstractCegarLoop]: Abstraction has 2037 states and 4422 transitions. [2021-08-21 18:52:36,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:52:36,361 INFO L276 IsEmpty]: Start isEmpty. Operand 2037 states and 4422 transitions. [2021-08-21 18:52:36,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:36,363 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:36,363 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:52:36,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2021-08-21 18:52:36,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable120 [2021-08-21 18:52:36,583 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:52:36,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:36,584 INFO L82 PathProgramCache]: Analyzing trace with hash 213876409, now seen corresponding path program 35 times [2021-08-21 18:52:36,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:36,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475597558] [2021-08-21 18:52:36,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:36,584 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:36,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:36,676 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:52:36,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:36,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475597558] [2021-08-21 18:52:36,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475597558] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:36,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947884886] [2021-08-21 18:52:36,677 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:52:36,677 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:36,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:36,680 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:52:36,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-08-21 18:52:38,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:52:38,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:38,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:52:38,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:38,672 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:52:38,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947884886] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:38,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:38,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:52:38,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930736610] [2021-08-21 18:52:38,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:52:38,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:38,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:52:38,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:52:38,673 INFO L87 Difference]: Start difference. First operand 2037 states and 4422 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:52:38,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:38,748 INFO L93 Difference]: Finished difference Result 2300 states and 4823 transitions. [2021-08-21 18:52:38,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:52:38,749 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:52:38,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:38,751 INFO L225 Difference]: With dead ends: 2300 [2021-08-21 18:52:38,751 INFO L226 Difference]: Without dead ends: 2291 [2021-08-21 18:52:38,751 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.3ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:52:38,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2021-08-21 18:52:38,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 2041. [2021-08-21 18:52:38,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2041 states, 2040 states have (on average 2.1627450980392156) internal successors, (4412), 2040 states have internal predecessors, (4412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:38,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2041 states to 2041 states and 4412 transitions. [2021-08-21 18:52:38,769 INFO L78 Accepts]: Start accepts. Automaton has 2041 states and 4412 transitions. Word has length 29 [2021-08-21 18:52:38,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:38,769 INFO L470 AbstractCegarLoop]: Abstraction has 2041 states and 4412 transitions. [2021-08-21 18:52:38,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:52:38,769 INFO L276 IsEmpty]: Start isEmpty. Operand 2041 states and 4412 transitions. [2021-08-21 18:52:38,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:38,771 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:38,784 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:52:38,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2021-08-21 18:52:39,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:39,001 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:52:39,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:39,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1361589771, now seen corresponding path program 36 times [2021-08-21 18:52:39,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:39,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205632155] [2021-08-21 18:52:39,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:39,001 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:39,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:39,077 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:52:39,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:39,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205632155] [2021-08-21 18:52:39,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205632155] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:39,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566404581] [2021-08-21 18:52:39,077 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:52:39,077 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:39,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:39,078 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:52:39,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-08-21 18:52:40,949 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:52:40,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:40,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:52:40,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:41,123 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:52:41,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566404581] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:41,124 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:41,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:52:41,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607116270] [2021-08-21 18:52:41,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:52:41,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:41,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:52:41,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:52:41,124 INFO L87 Difference]: Start difference. First operand 2041 states and 4412 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:52:41,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:41,205 INFO L93 Difference]: Finished difference Result 2302 states and 4806 transitions. [2021-08-21 18:52:41,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:52:41,205 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:52:41,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:41,208 INFO L225 Difference]: With dead ends: 2302 [2021-08-21 18:52:41,208 INFO L226 Difference]: Without dead ends: 2297 [2021-08-21 18:52:41,208 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.2ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:52:41,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2297 states. [2021-08-21 18:52:41,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2297 to 2084. [2021-08-21 18:52:41,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2084 states, 2083 states have (on average 2.1656265002400383) internal successors, (4511), 2083 states have internal predecessors, (4511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:41,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2084 states to 2084 states and 4511 transitions. [2021-08-21 18:52:41,226 INFO L78 Accepts]: Start accepts. Automaton has 2084 states and 4511 transitions. Word has length 29 [2021-08-21 18:52:41,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:41,226 INFO L470 AbstractCegarLoop]: Abstraction has 2084 states and 4511 transitions. [2021-08-21 18:52:41,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:52:41,226 INFO L276 IsEmpty]: Start isEmpty. Operand 2084 states and 4511 transitions. [2021-08-21 18:52:41,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:41,228 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:41,228 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:52:41,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2021-08-21 18:52:41,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-08-21 18:52:41,447 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:52:41,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:41,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1653537599, now seen corresponding path program 37 times [2021-08-21 18:52:41,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:41,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340955298] [2021-08-21 18:52:41,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:41,447 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:41,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:41,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:52:41,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:41,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340955298] [2021-08-21 18:52:41,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340955298] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:41,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122827579] [2021-08-21 18:52:41,525 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:52:41,525 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:41,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:41,526 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:52:41,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-08-21 18:52:43,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:43,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:52:43,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:43,493 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:52:43,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122827579] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:43,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:43,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:52:43,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825784315] [2021-08-21 18:52:43,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:52:43,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:43,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:52:43,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:52:43,494 INFO L87 Difference]: Start difference. First operand 2084 states and 4511 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:52:43,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:43,572 INFO L93 Difference]: Finished difference Result 2345 states and 4864 transitions. [2021-08-21 18:52:43,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:52:43,572 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:52:43,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:43,574 INFO L225 Difference]: With dead ends: 2345 [2021-08-21 18:52:43,574 INFO L226 Difference]: Without dead ends: 2340 [2021-08-21 18:52:43,574 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.8ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:52:43,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2340 states. [2021-08-21 18:52:43,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2340 to 2101. [2021-08-21 18:52:43,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2101 states, 2100 states have (on average 2.165238095238095) internal successors, (4547), 2100 states have internal predecessors, (4547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:43,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2101 states to 2101 states and 4547 transitions. [2021-08-21 18:52:43,593 INFO L78 Accepts]: Start accepts. Automaton has 2101 states and 4547 transitions. Word has length 29 [2021-08-21 18:52:43,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:43,593 INFO L470 AbstractCegarLoop]: Abstraction has 2101 states and 4547 transitions. [2021-08-21 18:52:43,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:52:43,593 INFO L276 IsEmpty]: Start isEmpty. Operand 2101 states and 4547 transitions. [2021-08-21 18:52:43,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:43,595 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:43,596 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:43,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2021-08-21 18:52:43,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:43,812 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:52:43,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:43,813 INFO L82 PathProgramCache]: Analyzing trace with hash 793525765, now seen corresponding path program 17 times [2021-08-21 18:52:43,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:43,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457366115] [2021-08-21 18:52:43,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:43,813 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:43,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:43,884 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:52:43,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:43,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457366115] [2021-08-21 18:52:43,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457366115] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:43,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9507647] [2021-08-21 18:52:43,885 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:52:43,885 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:43,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:43,886 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:52:43,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-08-21 18:52:45,805 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:52:45,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:45,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:52:45,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:45,942 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:52:45,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9507647] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:45,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:45,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:52:45,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915697824] [2021-08-21 18:52:45,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:52:45,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:45,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:52:45,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:52:45,943 INFO L87 Difference]: Start difference. First operand 2101 states and 4547 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:52:46,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:46,014 INFO L93 Difference]: Finished difference Result 2421 states and 5066 transitions. [2021-08-21 18:52:46,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:52:46,014 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:52:46,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:46,017 INFO L225 Difference]: With dead ends: 2421 [2021-08-21 18:52:46,017 INFO L226 Difference]: Without dead ends: 2412 [2021-08-21 18:52:46,017 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.4ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:52:46,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-08-21 18:52:46,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 2194. [2021-08-21 18:52:46,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2194 states, 2193 states have (on average 2.161422708618331) internal successors, (4740), 2193 states have internal predecessors, (4740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:46,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2194 states to 2194 states and 4740 transitions. [2021-08-21 18:52:46,036 INFO L78 Accepts]: Start accepts. Automaton has 2194 states and 4740 transitions. Word has length 29 [2021-08-21 18:52:46,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:46,036 INFO L470 AbstractCegarLoop]: Abstraction has 2194 states and 4740 transitions. [2021-08-21 18:52:46,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:52:46,036 INFO L276 IsEmpty]: Start isEmpty. Operand 2194 states and 4740 transitions. [2021-08-21 18:52:46,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:46,038 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:46,039 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:46,061 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2021-08-21 18:52:46,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-08-21 18:52:46,261 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:52:46,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:46,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1459747907, now seen corresponding path program 17 times [2021-08-21 18:52:46,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:46,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141931105] [2021-08-21 18:52:46,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:46,261 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:46,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:46,337 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:52:46,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:46,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141931105] [2021-08-21 18:52:46,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141931105] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:46,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069195278] [2021-08-21 18:52:46,337 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:52:46,337 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:46,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:46,338 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:52:46,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-08-21 18:52:48,263 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:52:48,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:48,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:52:48,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:48,397 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:52:48,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069195278] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:48,398 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:48,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:52:48,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677337259] [2021-08-21 18:52:48,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:52:48,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:48,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:52:48,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:52:48,398 INFO L87 Difference]: Start difference. First operand 2194 states and 4740 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:52:48,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:48,474 INFO L93 Difference]: Finished difference Result 2456 states and 5084 transitions. [2021-08-21 18:52:48,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:52:48,475 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:52:48,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:48,477 INFO L225 Difference]: With dead ends: 2456 [2021-08-21 18:52:48,477 INFO L226 Difference]: Without dead ends: 2451 [2021-08-21 18:52:48,477 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.1ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:52:48,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2451 states. [2021-08-21 18:52:48,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2451 to 2211. [2021-08-21 18:52:48,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2211 states, 2210 states have (on average 2.161990950226244) internal successors, (4778), 2210 states have internal predecessors, (4778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:48,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2211 states to 2211 states and 4778 transitions. [2021-08-21 18:52:48,496 INFO L78 Accepts]: Start accepts. Automaton has 2211 states and 4778 transitions. Word has length 29 [2021-08-21 18:52:48,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:48,496 INFO L470 AbstractCegarLoop]: Abstraction has 2211 states and 4778 transitions. [2021-08-21 18:52:48,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:52:48,497 INFO L276 IsEmpty]: Start isEmpty. Operand 2211 states and 4778 transitions. [2021-08-21 18:52:48,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:48,499 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:48,499 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:52:48,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2021-08-21 18:52:48,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-08-21 18:52:48,720 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:52:48,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:48,721 INFO L82 PathProgramCache]: Analyzing trace with hash 987315457, now seen corresponding path program 38 times [2021-08-21 18:52:48,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:48,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082893995] [2021-08-21 18:52:48,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:48,721 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:48,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:48,837 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:52:48,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:48,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082893995] [2021-08-21 18:52:48,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082893995] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:48,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759486612] [2021-08-21 18:52:48,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:52:48,837 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:48,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:48,849 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:52:48,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-08-21 18:52:50,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:52:50,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:50,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:52:50,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:50,936 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:52:50,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759486612] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:50,936 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:50,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:52:50,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302786449] [2021-08-21 18:52:50,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:52:50,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:50,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:52:50,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:52:50,937 INFO L87 Difference]: Start difference. First operand 2211 states and 4778 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:52:51,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:51,014 INFO L93 Difference]: Finished difference Result 2496 states and 5214 transitions. [2021-08-21 18:52:51,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:52:51,014 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:52:51,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:51,017 INFO L225 Difference]: With dead ends: 2496 [2021-08-21 18:52:51,017 INFO L226 Difference]: Without dead ends: 2487 [2021-08-21 18:52:51,017 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.3ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:52:51,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2487 states. [2021-08-21 18:52:51,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2487 to 2259. [2021-08-21 18:52:51,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2259 states, 2258 states have (on average 2.16829052258636) internal successors, (4896), 2258 states have internal predecessors, (4896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:51,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2259 states to 2259 states and 4896 transitions. [2021-08-21 18:52:51,037 INFO L78 Accepts]: Start accepts. Automaton has 2259 states and 4896 transitions. Word has length 29 [2021-08-21 18:52:51,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:51,038 INFO L470 AbstractCegarLoop]: Abstraction has 2259 states and 4896 transitions. [2021-08-21 18:52:51,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:52:51,038 INFO L276 IsEmpty]: Start isEmpty. Operand 2259 states and 4896 transitions. [2021-08-21 18:52:51,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:51,040 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:51,040 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:52:51,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2021-08-21 18:52:51,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-08-21 18:52:51,253 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:52:51,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:51,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1922153219, now seen corresponding path program 39 times [2021-08-21 18:52:51,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:51,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311517080] [2021-08-21 18:52:51,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:51,254 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:51,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:51,336 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:51,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:51,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311517080] [2021-08-21 18:52:51,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311517080] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:51,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235965368] [2021-08-21 18:52:51,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:52:51,337 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:51,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:51,338 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:52:51,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-08-21 18:52:53,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:52:53,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:53,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:52:53,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:53,481 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:53,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235965368] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:53,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:53,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:52:53,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937579834] [2021-08-21 18:52:53,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:52:53,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:53,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:52:53,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:52:53,482 INFO L87 Difference]: Start difference. First operand 2259 states and 4896 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:52:53,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:53,586 INFO L93 Difference]: Finished difference Result 2518 states and 5262 transitions. [2021-08-21 18:52:53,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:52:53,587 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:52:53,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:53,589 INFO L225 Difference]: With dead ends: 2518 [2021-08-21 18:52:53,589 INFO L226 Difference]: Without dead ends: 2513 [2021-08-21 18:52:53,590 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.4ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:52:53,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2513 states. [2021-08-21 18:52:53,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2513 to 2289. [2021-08-21 18:52:53,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2289 states, 2288 states have (on average 2.168269230769231) internal successors, (4961), 2288 states have internal predecessors, (4961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:53,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2289 states to 2289 states and 4961 transitions. [2021-08-21 18:52:53,610 INFO L78 Accepts]: Start accepts. Automaton has 2289 states and 4961 transitions. Word has length 29 [2021-08-21 18:52:53,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:53,610 INFO L470 AbstractCegarLoop]: Abstraction has 2289 states and 4961 transitions. [2021-08-21 18:52:53,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:52:53,610 INFO L276 IsEmpty]: Start isEmpty. Operand 2289 states and 4961 transitions. [2021-08-21 18:52:53,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:53,613 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:53,613 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:52:53,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2021-08-21 18:52:53,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-08-21 18:52:53,835 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:52:53,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:53,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1326679169, now seen corresponding path program 40 times [2021-08-21 18:52:53,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:53,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113606635] [2021-08-21 18:52:53,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:53,836 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:53,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:53,908 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:53,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:53,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113606635] [2021-08-21 18:52:53,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113606635] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:53,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987935938] [2021-08-21 18:52:53,908 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:52:53,908 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:53,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:53,909 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:52:53,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-08-21 18:52:55,939 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:52:55,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:55,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:52:55,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:56,077 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:56,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987935938] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:56,077 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:56,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:52:56,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032808117] [2021-08-21 18:52:56,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:52:56,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:56,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:52:56,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:52:56,078 INFO L87 Difference]: Start difference. First operand 2289 states and 4961 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:52:56,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:56,164 INFO L93 Difference]: Finished difference Result 2523 states and 5289 transitions. [2021-08-21 18:52:56,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:52:56,165 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:52:56,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:56,167 INFO L225 Difference]: With dead ends: 2523 [2021-08-21 18:52:56,167 INFO L226 Difference]: Without dead ends: 2518 [2021-08-21 18:52:56,167 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.4ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:52:56,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2518 states. [2021-08-21 18:52:56,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2518 to 2313. [2021-08-21 18:52:56,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2313 states, 2312 states have (on average 2.171280276816609) internal successors, (5020), 2312 states have internal predecessors, (5020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:56,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2313 states to 2313 states and 5020 transitions. [2021-08-21 18:52:56,188 INFO L78 Accepts]: Start accepts. Automaton has 2313 states and 5020 transitions. Word has length 29 [2021-08-21 18:52:56,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:56,189 INFO L470 AbstractCegarLoop]: Abstraction has 2313 states and 5020 transitions. [2021-08-21 18:52:56,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:52:56,189 INFO L276 IsEmpty]: Start isEmpty. Operand 2313 states and 5020 transitions. [2021-08-21 18:52:56,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:56,191 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:56,191 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:52:56,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2021-08-21 18:52:56,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:56,413 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:52:56,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:56,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1284222337, now seen corresponding path program 41 times [2021-08-21 18:52:56,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:56,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588759656] [2021-08-21 18:52:56,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:56,413 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:56,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:56,488 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:52:56,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:56,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588759656] [2021-08-21 18:52:56,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588759656] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:56,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144342109] [2021-08-21 18:52:56,489 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:52:56,489 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:56,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:56,490 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:52:56,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-08-21 18:52:58,507 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:52:58,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:58,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:52:58,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:58,641 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:52:58,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144342109] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:58,642 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:58,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:52:58,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951866477] [2021-08-21 18:52:58,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:52:58,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:58,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:52:58,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:52:58,642 INFO L87 Difference]: Start difference. First operand 2313 states and 5020 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:52:58,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:58,714 INFO L93 Difference]: Finished difference Result 2712 states and 5692 transitions. [2021-08-21 18:52:58,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:52:58,715 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:52:58,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:58,718 INFO L225 Difference]: With dead ends: 2712 [2021-08-21 18:52:58,718 INFO L226 Difference]: Without dead ends: 2679 [2021-08-21 18:52:58,718 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.0ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:52:58,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2679 states. [2021-08-21 18:52:58,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2679 to 2411. [2021-08-21 18:52:58,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2411 states, 2410 states have (on average 2.1601659751037343) internal successors, (5206), 2410 states have internal predecessors, (5206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:58,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2411 states to 2411 states and 5206 transitions. [2021-08-21 18:52:58,738 INFO L78 Accepts]: Start accepts. Automaton has 2411 states and 5206 transitions. Word has length 29 [2021-08-21 18:52:58,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:58,738 INFO L470 AbstractCegarLoop]: Abstraction has 2411 states and 5206 transitions. [2021-08-21 18:52:58,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:52:58,738 INFO L276 IsEmpty]: Start isEmpty. Operand 2411 states and 5206 transitions. [2021-08-21 18:52:58,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:58,741 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:58,741 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:52:58,763 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2021-08-21 18:52:58,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:58,963 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:52:58,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:58,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1091346519, now seen corresponding path program 42 times [2021-08-21 18:52:58,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:58,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503732126] [2021-08-21 18:52:58,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:58,964 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:58,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:59,036 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:52:59,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:59,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503732126] [2021-08-21 18:52:59,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503732126] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:59,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518018015] [2021-08-21 18:52:59,036 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:52:59,036 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:59,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:59,037 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:52:59,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-08-21 18:53:01,086 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:53:01,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:01,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:53:01,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:01,221 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:53:01,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518018015] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:01,221 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:01,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:53:01,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222400758] [2021-08-21 18:53:01,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:53:01,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:01,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:53:01,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:53:01,222 INFO L87 Difference]: Start difference. First operand 2411 states and 5206 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:53:01,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:01,321 INFO L93 Difference]: Finished difference Result 2720 states and 5651 transitions. [2021-08-21 18:53:01,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:53:01,321 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:53:01,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:01,324 INFO L225 Difference]: With dead ends: 2720 [2021-08-21 18:53:01,324 INFO L226 Difference]: Without dead ends: 2715 [2021-08-21 18:53:01,324 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.5ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:53:01,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2715 states. [2021-08-21 18:53:01,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2715 to 2390. [2021-08-21 18:53:01,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2390 states, 2389 states have (on average 2.156550858099623) internal successors, (5152), 2389 states have internal predecessors, (5152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:01,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2390 states to 2390 states and 5152 transitions. [2021-08-21 18:53:01,345 INFO L78 Accepts]: Start accepts. Automaton has 2390 states and 5152 transitions. Word has length 29 [2021-08-21 18:53:01,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:01,345 INFO L470 AbstractCegarLoop]: Abstraction has 2390 states and 5152 transitions. [2021-08-21 18:53:01,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:53:01,345 INFO L276 IsEmpty]: Start isEmpty. Operand 2390 states and 5152 transitions. [2021-08-21 18:53:01,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:01,347 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:01,347 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:01,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2021-08-21 18:53:01,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:01,569 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:53:01,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:01,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1355716845, now seen corresponding path program 18 times [2021-08-21 18:53:01,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:01,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758891713] [2021-08-21 18:53:01,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:01,570 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:01,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:01,643 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:53:01,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:01,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758891713] [2021-08-21 18:53:01,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758891713] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:01,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880496307] [2021-08-21 18:53:01,643 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:53:01,644 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:01,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:01,644 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:01,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-08-21 18:53:03,715 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:53:03,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:03,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:53:03,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:03,852 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:53:03,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880496307] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:03,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:03,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:53:03,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045593481] [2021-08-21 18:53:03,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:53:03,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:03,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:53:03,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:53:03,853 INFO L87 Difference]: Start difference. First operand 2390 states and 5152 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:53:03,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:03,926 INFO L93 Difference]: Finished difference Result 2713 states and 5673 transitions. [2021-08-21 18:53:03,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:53:03,926 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:53:03,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:03,929 INFO L225 Difference]: With dead ends: 2713 [2021-08-21 18:53:03,929 INFO L226 Difference]: Without dead ends: 2704 [2021-08-21 18:53:03,929 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.1ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:53:03,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2704 states. [2021-08-21 18:53:03,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2704 to 2387. [2021-08-21 18:53:03,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2387 states, 2386 states have (on average 2.1617770326906958) internal successors, (5158), 2386 states have internal predecessors, (5158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:03,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2387 states to 2387 states and 5158 transitions. [2021-08-21 18:53:03,950 INFO L78 Accepts]: Start accepts. Automaton has 2387 states and 5158 transitions. Word has length 29 [2021-08-21 18:53:03,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:03,950 INFO L470 AbstractCegarLoop]: Abstraction has 2387 states and 5158 transitions. [2021-08-21 18:53:03,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:53:03,950 INFO L276 IsEmpty]: Start isEmpty. Operand 2387 states and 5158 transitions. [2021-08-21 18:53:03,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:03,953 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:03,953 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:53:03,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2021-08-21 18:53:04,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:04,174 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:53:04,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:04,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1238831645, now seen corresponding path program 43 times [2021-08-21 18:53:04,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:04,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185698221] [2021-08-21 18:53:04,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:04,175 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:04,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:04,250 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:53:04,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:04,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185698221] [2021-08-21 18:53:04,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185698221] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:04,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660211056] [2021-08-21 18:53:04,250 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:53:04,250 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:04,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:04,251 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:04,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-08-21 18:53:06,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:06,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:53:06,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:06,495 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:53:06,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660211056] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:06,496 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:06,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:53:06,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302712745] [2021-08-21 18:53:06,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:53:06,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:06,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:53:06,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:53:06,496 INFO L87 Difference]: Start difference. First operand 2387 states and 5158 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:53:06,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:06,575 INFO L93 Difference]: Finished difference Result 2654 states and 5529 transitions. [2021-08-21 18:53:06,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:53:06,575 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:53:06,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:06,578 INFO L225 Difference]: With dead ends: 2654 [2021-08-21 18:53:06,578 INFO L226 Difference]: Without dead ends: 2649 [2021-08-21 18:53:06,578 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.1ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:53:06,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2649 states. [2021-08-21 18:53:06,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2649 to 2385. [2021-08-21 18:53:06,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2385 states, 2384 states have (on average 2.159815436241611) internal successors, (5149), 2384 states have internal predecessors, (5149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:06,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2385 states to 2385 states and 5149 transitions. [2021-08-21 18:53:06,599 INFO L78 Accepts]: Start accepts. Automaton has 2385 states and 5149 transitions. Word has length 29 [2021-08-21 18:53:06,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:06,599 INFO L470 AbstractCegarLoop]: Abstraction has 2385 states and 5149 transitions. [2021-08-21 18:53:06,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:53:06,599 INFO L276 IsEmpty]: Start isEmpty. Operand 2385 states and 5149 transitions. [2021-08-21 18:53:06,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:06,601 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:06,601 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:06,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2021-08-21 18:53:06,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:06,819 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:53:06,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:06,820 INFO L82 PathProgramCache]: Analyzing trace with hash -609072287, now seen corresponding path program 19 times [2021-08-21 18:53:06,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:06,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958701976] [2021-08-21 18:53:06,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:06,820 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:06,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:06,898 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:53:06,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:06,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958701976] [2021-08-21 18:53:06,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958701976] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:06,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242947022] [2021-08-21 18:53:06,898 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:53:06,898 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:06,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:06,899 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:06,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-08-21 18:53:08,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:09,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:53:09,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:09,128 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:53:09,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242947022] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:09,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:09,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:53:09,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126898912] [2021-08-21 18:53:09,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:53:09,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:09,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:53:09,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:53:09,129 INFO L87 Difference]: Start difference. First operand 2385 states and 5149 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:53:09,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:09,199 INFO L93 Difference]: Finished difference Result 2676 states and 5606 transitions. [2021-08-21 18:53:09,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:53:09,199 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:53:09,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:09,203 INFO L225 Difference]: With dead ends: 2676 [2021-08-21 18:53:09,203 INFO L226 Difference]: Without dead ends: 2667 [2021-08-21 18:53:09,203 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.2ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:53:09,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2667 states. [2021-08-21 18:53:09,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2667 to 2411. [2021-08-21 18:53:09,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2411 states, 2410 states have (on average 2.1601659751037343) internal successors, (5206), 2410 states have internal predecessors, (5206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:09,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2411 states to 2411 states and 5206 transitions. [2021-08-21 18:53:09,228 INFO L78 Accepts]: Start accepts. Automaton has 2411 states and 5206 transitions. Word has length 29 [2021-08-21 18:53:09,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:09,228 INFO L470 AbstractCegarLoop]: Abstraction has 2411 states and 5206 transitions. [2021-08-21 18:53:09,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:53:09,229 INFO L276 IsEmpty]: Start isEmpty. Operand 2411 states and 5206 transitions. [2021-08-21 18:53:09,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:09,231 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:09,239 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:09,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2021-08-21 18:53:09,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-08-21 18:53:09,449 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:53:09,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:09,449 INFO L82 PathProgramCache]: Analyzing trace with hash -996917143, now seen corresponding path program 20 times [2021-08-21 18:53:09,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:09,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912234585] [2021-08-21 18:53:09,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:09,449 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:09,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:09,525 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:09,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:09,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912234585] [2021-08-21 18:53:09,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912234585] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:09,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358229392] [2021-08-21 18:53:09,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:09,526 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:09,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:09,526 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:09,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-08-21 18:53:11,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:11,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:11,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:53:11,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:11,804 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:11,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358229392] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:11,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:11,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:53:11,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267111918] [2021-08-21 18:53:11,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:53:11,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:11,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:53:11,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:53:11,805 INFO L87 Difference]: Start difference. First operand 2411 states and 5206 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:53:11,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:11,881 INFO L93 Difference]: Finished difference Result 2669 states and 5595 transitions. [2021-08-21 18:53:11,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:53:11,881 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:53:11,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:11,884 INFO L225 Difference]: With dead ends: 2669 [2021-08-21 18:53:11,884 INFO L226 Difference]: Without dead ends: 2664 [2021-08-21 18:53:11,884 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.9ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:53:11,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2664 states. [2021-08-21 18:53:11,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2664 to 2419. [2021-08-21 18:53:11,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2419 states, 2418 states have (on average 2.161290322580645) internal successors, (5226), 2418 states have internal predecessors, (5226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:11,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2419 states to 2419 states and 5226 transitions. [2021-08-21 18:53:11,904 INFO L78 Accepts]: Start accepts. Automaton has 2419 states and 5226 transitions. Word has length 29 [2021-08-21 18:53:11,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:11,904 INFO L470 AbstractCegarLoop]: Abstraction has 2419 states and 5226 transitions. [2021-08-21 18:53:11,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:53:11,904 INFO L276 IsEmpty]: Start isEmpty. Operand 2419 states and 5226 transitions. [2021-08-21 18:53:11,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:11,907 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:11,907 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:53:11,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2021-08-21 18:53:12,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-08-21 18:53:12,128 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:53:12,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:12,129 INFO L82 PathProgramCache]: Analyzing trace with hash -628044623, now seen corresponding path program 44 times [2021-08-21 18:53:12,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:12,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674994751] [2021-08-21 18:53:12,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:12,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:12,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:12,208 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:53:12,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:12,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674994751] [2021-08-21 18:53:12,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674994751] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:12,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063417933] [2021-08-21 18:53:12,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:12,208 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:12,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:12,213 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:12,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-08-21 18:53:14,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:14,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:14,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:53:14,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:14,446 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:53:14,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063417933] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:14,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:14,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:53:14,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313878476] [2021-08-21 18:53:14,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:53:14,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:14,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:53:14,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:53:14,447 INFO L87 Difference]: Start difference. First operand 2419 states and 5226 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:53:14,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:14,544 INFO L93 Difference]: Finished difference Result 2735 states and 5760 transitions. [2021-08-21 18:53:14,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:53:14,544 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:53:14,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:14,547 INFO L225 Difference]: With dead ends: 2735 [2021-08-21 18:53:14,547 INFO L226 Difference]: Without dead ends: 2726 [2021-08-21 18:53:14,547 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.6ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:53:14,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2726 states. [2021-08-21 18:53:14,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2726 to 2493. [2021-08-21 18:53:14,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2493 states, 2492 states have (on average 2.1597110754414124) internal successors, (5382), 2492 states have internal predecessors, (5382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:14,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2493 states to 2493 states and 5382 transitions. [2021-08-21 18:53:14,569 INFO L78 Accepts]: Start accepts. Automaton has 2493 states and 5382 transitions. Word has length 29 [2021-08-21 18:53:14,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:14,569 INFO L470 AbstractCegarLoop]: Abstraction has 2493 states and 5382 transitions. [2021-08-21 18:53:14,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:53:14,569 INFO L276 IsEmpty]: Start isEmpty. Operand 2493 states and 5382 transitions. [2021-08-21 18:53:14,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:14,571 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:14,571 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:53:14,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2021-08-21 18:53:14,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-08-21 18:53:14,784 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:53:14,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:14,784 INFO L82 PathProgramCache]: Analyzing trace with hash 2091456493, now seen corresponding path program 45 times [2021-08-21 18:53:14,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:14,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240391167] [2021-08-21 18:53:14,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:14,785 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:14,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:14,859 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:53:14,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:14,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240391167] [2021-08-21 18:53:14,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240391167] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:14,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354803767] [2021-08-21 18:53:14,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:53:14,860 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:14,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:14,861 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:14,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-08-21 18:53:16,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:53:16,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:16,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:53:16,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:17,008 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:53:17,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354803767] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:17,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:17,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:53:17,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302687060] [2021-08-21 18:53:17,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:53:17,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:17,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:53:17,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:53:17,010 INFO L87 Difference]: Start difference. First operand 2493 states and 5382 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:53:17,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:17,076 INFO L93 Difference]: Finished difference Result 2748 states and 5757 transitions. [2021-08-21 18:53:17,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:53:17,076 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:53:17,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:17,079 INFO L225 Difference]: With dead ends: 2748 [2021-08-21 18:53:17,079 INFO L226 Difference]: Without dead ends: 2743 [2021-08-21 18:53:17,079 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.7ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:53:17,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2743 states. [2021-08-21 18:53:17,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2743 to 2508. [2021-08-21 18:53:17,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2508 states, 2507 states have (on average 2.1587554846429997) internal successors, (5412), 2507 states have internal predecessors, (5412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:17,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2508 states to 2508 states and 5412 transitions. [2021-08-21 18:53:17,104 INFO L78 Accepts]: Start accepts. Automaton has 2508 states and 5412 transitions. Word has length 29 [2021-08-21 18:53:17,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:17,104 INFO L470 AbstractCegarLoop]: Abstraction has 2508 states and 5412 transitions. [2021-08-21 18:53:17,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:53:17,105 INFO L276 IsEmpty]: Start isEmpty. Operand 2508 states and 5412 transitions. [2021-08-21 18:53:17,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:17,107 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:17,107 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:17,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2021-08-21 18:53:17,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-08-21 18:53:17,329 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:53:17,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:17,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1531385073, now seen corresponding path program 18 times [2021-08-21 18:53:17,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:17,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792978487] [2021-08-21 18:53:17,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:17,331 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:17,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:17,402 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:53:17,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:17,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792978487] [2021-08-21 18:53:17,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792978487] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:17,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954503208] [2021-08-21 18:53:17,403 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:53:17,403 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:17,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:17,404 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:17,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2021-08-21 18:53:19,538 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:53:19,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:19,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:53:19,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:19,680 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:53:19,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954503208] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:19,680 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:19,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:53:19,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424080346] [2021-08-21 18:53:19,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:53:19,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:19,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:53:19,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:53:19,681 INFO L87 Difference]: Start difference. First operand 2508 states and 5412 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:53:19,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:19,759 INFO L93 Difference]: Finished difference Result 2798 states and 5810 transitions. [2021-08-21 18:53:19,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:53:19,759 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:53:19,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:19,762 INFO L225 Difference]: With dead ends: 2798 [2021-08-21 18:53:19,762 INFO L226 Difference]: Without dead ends: 2793 [2021-08-21 18:53:19,762 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.0ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:53:19,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2793 states. [2021-08-21 18:53:19,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2793 to 2487. [2021-08-21 18:53:19,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2486 states have (on average 2.152855993563958) internal successors, (5352), 2486 states have internal predecessors, (5352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:19,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 5352 transitions. [2021-08-21 18:53:19,784 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 5352 transitions. Word has length 29 [2021-08-21 18:53:19,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:19,784 INFO L470 AbstractCegarLoop]: Abstraction has 2487 states and 5352 transitions. [2021-08-21 18:53:19,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:53:19,784 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 5352 transitions. [2021-08-21 18:53:19,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:19,787 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:19,787 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:53:19,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2021-08-21 18:53:20,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:20,005 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:53:20,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:20,005 INFO L82 PathProgramCache]: Analyzing trace with hash -316518859, now seen corresponding path program 46 times [2021-08-21 18:53:20,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:20,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12906955] [2021-08-21 18:53:20,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:20,005 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:20,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:20,081 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:53:20,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:20,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12906955] [2021-08-21 18:53:20,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12906955] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:20,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506576887] [2021-08-21 18:53:20,082 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:53:20,082 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:20,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:20,082 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:20,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2021-08-21 18:53:22,330 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:53:22,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:22,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:53:22,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:22,484 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:53:22,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506576887] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:22,484 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:22,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:53:22,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76130217] [2021-08-21 18:53:22,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:53:22,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:22,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:53:22,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:53:22,485 INFO L87 Difference]: Start difference. First operand 2487 states and 5352 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:53:22,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:22,568 INFO L93 Difference]: Finished difference Result 2786 states and 5814 transitions. [2021-08-21 18:53:22,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:53:22,568 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:53:22,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:22,571 INFO L225 Difference]: With dead ends: 2786 [2021-08-21 18:53:22,571 INFO L226 Difference]: Without dead ends: 2777 [2021-08-21 18:53:22,571 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.8ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:53:22,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2777 states. [2021-08-21 18:53:22,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2777 to 2490. [2021-08-21 18:53:22,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2490 states, 2489 states have (on average 2.1558858979509843) internal successors, (5366), 2489 states have internal predecessors, (5366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:22,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2490 states to 2490 states and 5366 transitions. [2021-08-21 18:53:22,592 INFO L78 Accepts]: Start accepts. Automaton has 2490 states and 5366 transitions. Word has length 29 [2021-08-21 18:53:22,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:22,593 INFO L470 AbstractCegarLoop]: Abstraction has 2490 states and 5366 transitions. [2021-08-21 18:53:22,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:53:22,593 INFO L276 IsEmpty]: Start isEmpty. Operand 2490 states and 5366 transitions. [2021-08-21 18:53:22,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:22,595 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:22,595 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:53:22,617 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2021-08-21 18:53:22,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:22,796 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:53:22,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:22,796 INFO L82 PathProgramCache]: Analyzing trace with hash -2017949959, now seen corresponding path program 47 times [2021-08-21 18:53:22,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:22,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035902288] [2021-08-21 18:53:22,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:22,797 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:22,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:22,872 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:22,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:22,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035902288] [2021-08-21 18:53:22,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035902288] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:22,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609839933] [2021-08-21 18:53:22,872 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:53:22,872 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:22,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:22,873 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:22,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2021-08-21 18:53:25,076 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:53:25,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:25,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:53:25,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:25,210 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:25,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609839933] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:25,210 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:25,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:53:25,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893358494] [2021-08-21 18:53:25,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:53:25,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:25,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:53:25,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:53:25,211 INFO L87 Difference]: Start difference. First operand 2490 states and 5366 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:53:25,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:25,292 INFO L93 Difference]: Finished difference Result 2755 states and 5759 transitions. [2021-08-21 18:53:25,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:53:25,293 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:53:25,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:25,296 INFO L225 Difference]: With dead ends: 2755 [2021-08-21 18:53:25,296 INFO L226 Difference]: Without dead ends: 2750 [2021-08-21 18:53:25,296 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.6ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:53:25,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2750 states. [2021-08-21 18:53:25,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2750 to 2481. [2021-08-21 18:53:25,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2481 states, 2480 states have (on average 2.155241935483871) internal successors, (5345), 2480 states have internal predecessors, (5345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:25,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2481 states to 2481 states and 5345 transitions. [2021-08-21 18:53:25,321 INFO L78 Accepts]: Start accepts. Automaton has 2481 states and 5345 transitions. Word has length 29 [2021-08-21 18:53:25,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:25,321 INFO L470 AbstractCegarLoop]: Abstraction has 2481 states and 5345 transitions. [2021-08-21 18:53:25,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:53:25,321 INFO L276 IsEmpty]: Start isEmpty. Operand 2481 states and 5345 transitions. [2021-08-21 18:53:25,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:25,324 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:25,324 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:53:25,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2021-08-21 18:53:25,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-08-21 18:53:25,541 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:53:25,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:25,541 INFO L82 PathProgramCache]: Analyzing trace with hash -88393739, now seen corresponding path program 48 times [2021-08-21 18:53:25,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:25,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485216858] [2021-08-21 18:53:25,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:25,541 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:25,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:25,617 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:25,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:25,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485216858] [2021-08-21 18:53:25,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485216858] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:25,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270773128] [2021-08-21 18:53:25,617 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:53:25,618 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:25,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:25,618 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:25,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2021-08-21 18:53:27,880 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:53:27,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:27,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:53:27,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:28,013 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:28,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270773128] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:28,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:28,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:53:28,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362116379] [2021-08-21 18:53:28,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:53:28,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:28,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:53:28,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:53:28,014 INFO L87 Difference]: Start difference. First operand 2481 states and 5345 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:53:28,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:28,096 INFO L93 Difference]: Finished difference Result 2710 states and 5687 transitions. [2021-08-21 18:53:28,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:53:28,096 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:53:28,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:28,099 INFO L225 Difference]: With dead ends: 2710 [2021-08-21 18:53:28,099 INFO L226 Difference]: Without dead ends: 2705 [2021-08-21 18:53:28,099 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.2ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:53:28,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2705 states. [2021-08-21 18:53:28,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2705 to 2474. [2021-08-21 18:53:28,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2474 states, 2473 states have (on average 2.153659522846745) internal successors, (5326), 2473 states have internal predecessors, (5326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:28,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2474 states to 2474 states and 5326 transitions. [2021-08-21 18:53:28,120 INFO L78 Accepts]: Start accepts. Automaton has 2474 states and 5326 transitions. Word has length 29 [2021-08-21 18:53:28,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:28,120 INFO L470 AbstractCegarLoop]: Abstraction has 2474 states and 5326 transitions. [2021-08-21 18:53:28,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:53:28,120 INFO L276 IsEmpty]: Start isEmpty. Operand 2474 states and 5326 transitions. [2021-08-21 18:53:28,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:28,122 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:28,122 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:28,144 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2021-08-21 18:53:28,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:28,341 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:53:28,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:28,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1098445429, now seen corresponding path program 19 times [2021-08-21 18:53:28,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:28,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028588375] [2021-08-21 18:53:28,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:28,341 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:28,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:28,421 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:53:28,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:28,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028588375] [2021-08-21 18:53:28,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028588375] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:28,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200370422] [2021-08-21 18:53:28,422 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:53:28,422 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:28,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:28,422 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:28,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2021-08-21 18:53:30,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:30,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:53:30,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:30,912 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:53:30,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200370422] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:30,912 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:30,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:53:30,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374712503] [2021-08-21 18:53:30,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:53:30,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:30,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:53:30,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:53:30,913 INFO L87 Difference]: Start difference. First operand 2474 states and 5326 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:53:30,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:30,991 INFO L93 Difference]: Finished difference Result 2730 states and 5682 transitions. [2021-08-21 18:53:30,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:53:30,992 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:53:30,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:30,995 INFO L225 Difference]: With dead ends: 2730 [2021-08-21 18:53:30,995 INFO L226 Difference]: Without dead ends: 2725 [2021-08-21 18:53:30,995 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.2ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:53:30,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2725 states. [2021-08-21 18:53:31,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2725 to 2472. [2021-08-21 18:53:31,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 2471 states have (on average 2.150951031970862) internal successors, (5315), 2471 states have internal predecessors, (5315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:31,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 5315 transitions. [2021-08-21 18:53:31,016 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 5315 transitions. Word has length 29 [2021-08-21 18:53:31,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:31,016 INFO L470 AbstractCegarLoop]: Abstraction has 2472 states and 5315 transitions. [2021-08-21 18:53:31,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:53:31,016 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 5315 transitions. [2021-08-21 18:53:31,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:31,018 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:31,018 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:53:31,040 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2021-08-21 18:53:31,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:31,236 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:53:31,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:31,237 INFO L82 PathProgramCache]: Analyzing trace with hash -749458503, now seen corresponding path program 49 times [2021-08-21 18:53:31,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:31,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597257994] [2021-08-21 18:53:31,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:31,237 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:31,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:31,312 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:53:31,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:31,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597257994] [2021-08-21 18:53:31,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597257994] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:31,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478713446] [2021-08-21 18:53:31,312 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:53:31,313 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:31,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:31,313 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:31,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2021-08-21 18:53:33,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:33,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:53:33,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:33,708 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:53:33,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478713446] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:33,708 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:33,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:53:33,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679965527] [2021-08-21 18:53:33,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:53:33,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:33,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:53:33,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:53:33,709 INFO L87 Difference]: Start difference. First operand 2472 states and 5315 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:53:33,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:33,788 INFO L93 Difference]: Finished difference Result 2741 states and 5735 transitions. [2021-08-21 18:53:33,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:53:33,788 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:53:33,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:33,791 INFO L225 Difference]: With dead ends: 2741 [2021-08-21 18:53:33,791 INFO L226 Difference]: Without dead ends: 2732 [2021-08-21 18:53:33,791 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.2ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:53:33,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2732 states. [2021-08-21 18:53:33,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2732 to 2490. [2021-08-21 18:53:33,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2490 states, 2489 states have (on average 2.1542788268380875) internal successors, (5362), 2489 states have internal predecessors, (5362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:33,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2490 states to 2490 states and 5362 transitions. [2021-08-21 18:53:33,813 INFO L78 Accepts]: Start accepts. Automaton has 2490 states and 5362 transitions. Word has length 29 [2021-08-21 18:53:33,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:33,814 INFO L470 AbstractCegarLoop]: Abstraction has 2490 states and 5362 transitions. [2021-08-21 18:53:33,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:53:33,814 INFO L276 IsEmpty]: Start isEmpty. Operand 2490 states and 5362 transitions. [2021-08-21 18:53:33,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:33,816 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:33,816 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:33,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2021-08-21 18:53:34,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:34,037 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:53:34,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:34,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1099229689, now seen corresponding path program 20 times [2021-08-21 18:53:34,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:34,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813453780] [2021-08-21 18:53:34,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:34,038 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:34,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:34,111 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:34,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:34,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813453780] [2021-08-21 18:53:34,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813453780] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:34,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717172139] [2021-08-21 18:53:34,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:34,112 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:34,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:34,112 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:34,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2021-08-21 18:53:36,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:36,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:36,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:53:36,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:36,565 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:36,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717172139] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:36,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:36,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:53:36,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463150438] [2021-08-21 18:53:36,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:53:36,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:36,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:53:36,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:53:36,566 INFO L87 Difference]: Start difference. First operand 2490 states and 5362 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:53:36,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:36,652 INFO L93 Difference]: Finished difference Result 2719 states and 5693 transitions. [2021-08-21 18:53:36,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:53:36,652 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:53:36,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:36,655 INFO L225 Difference]: With dead ends: 2719 [2021-08-21 18:53:36,655 INFO L226 Difference]: Without dead ends: 2714 [2021-08-21 18:53:36,656 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.5ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:53:36,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2714 states. [2021-08-21 18:53:36,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2714 to 2494. [2021-08-21 18:53:36,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2494 states, 2493 states have (on average 2.1556357801845167) internal successors, (5374), 2493 states have internal predecessors, (5374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:36,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2494 states to 2494 states and 5374 transitions. [2021-08-21 18:53:36,678 INFO L78 Accepts]: Start accepts. Automaton has 2494 states and 5374 transitions. Word has length 29 [2021-08-21 18:53:36,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:36,678 INFO L470 AbstractCegarLoop]: Abstraction has 2494 states and 5374 transitions. [2021-08-21 18:53:36,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:53:36,678 INFO L276 IsEmpty]: Start isEmpty. Operand 2494 states and 5374 transitions. [2021-08-21 18:53:36,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:36,681 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:36,681 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:53:36,713 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2021-08-21 18:53:36,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:36,894 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:53:36,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:36,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1844077693, now seen corresponding path program 50 times [2021-08-21 18:53:36,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:36,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234935569] [2021-08-21 18:53:36,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:36,895 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:36,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:36,975 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:36,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:36,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234935569] [2021-08-21 18:53:36,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234935569] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:36,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747275104] [2021-08-21 18:53:36,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:36,975 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:36,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:36,976 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:36,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2021-08-21 18:53:39,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:39,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:39,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:53:39,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:39,355 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:39,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747275104] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:39,356 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:39,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:53:39,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698765038] [2021-08-21 18:53:39,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:53:39,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:39,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:53:39,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:53:39,356 INFO L87 Difference]: Start difference. First operand 2494 states and 5374 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:53:39,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:39,440 INFO L93 Difference]: Finished difference Result 2743 states and 5739 transitions. [2021-08-21 18:53:39,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:53:39,441 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:53:39,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:39,444 INFO L225 Difference]: With dead ends: 2743 [2021-08-21 18:53:39,444 INFO L226 Difference]: Without dead ends: 2738 [2021-08-21 18:53:39,444 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.1ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:53:39,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2738 states. [2021-08-21 18:53:39,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2738 to 2480. [2021-08-21 18:53:39,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2480 states, 2479 states have (on average 2.156111335215813) internal successors, (5345), 2479 states have internal predecessors, (5345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:39,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2480 states to 2480 states and 5345 transitions. [2021-08-21 18:53:39,466 INFO L78 Accepts]: Start accepts. Automaton has 2480 states and 5345 transitions. Word has length 29 [2021-08-21 18:53:39,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:39,466 INFO L470 AbstractCegarLoop]: Abstraction has 2480 states and 5345 transitions. [2021-08-21 18:53:39,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:53:39,466 INFO L276 IsEmpty]: Start isEmpty. Operand 2480 states and 5345 transitions. [2021-08-21 18:53:39,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:39,468 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:39,468 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:53:39,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2021-08-21 18:53:39,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-08-21 18:53:39,692 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:53:39,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:39,692 INFO L82 PathProgramCache]: Analyzing trace with hash 349270257, now seen corresponding path program 51 times [2021-08-21 18:53:39,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:39,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293863350] [2021-08-21 18:53:39,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:39,693 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:39,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:39,773 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:39,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:39,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293863350] [2021-08-21 18:53:39,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293863350] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:39,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419718046] [2021-08-21 18:53:39,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:53:39,774 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:39,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:39,775 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:39,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2021-08-21 18:53:42,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:53:42,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:42,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:53:42,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:42,265 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:42,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419718046] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:42,265 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:42,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:53:42,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020968920] [2021-08-21 18:53:42,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:53:42,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:42,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:53:42,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:53:42,266 INFO L87 Difference]: Start difference. First operand 2480 states and 5345 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:53:42,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:42,353 INFO L93 Difference]: Finished difference Result 2695 states and 5664 transitions. [2021-08-21 18:53:42,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:53:42,353 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:53:42,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:42,356 INFO L225 Difference]: With dead ends: 2695 [2021-08-21 18:53:42,356 INFO L226 Difference]: Without dead ends: 2690 [2021-08-21 18:53:42,356 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.2ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:53:42,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2690 states. [2021-08-21 18:53:42,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2690 to 2484. [2021-08-21 18:53:42,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2484 states, 2483 states have (on average 2.157470801449859) internal successors, (5357), 2483 states have internal predecessors, (5357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:42,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2484 states to 2484 states and 5357 transitions. [2021-08-21 18:53:42,377 INFO L78 Accepts]: Start accepts. Automaton has 2484 states and 5357 transitions. Word has length 29 [2021-08-21 18:53:42,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:42,378 INFO L470 AbstractCegarLoop]: Abstraction has 2484 states and 5357 transitions. [2021-08-21 18:53:42,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:53:42,378 INFO L276 IsEmpty]: Start isEmpty. Operand 2484 states and 5357 transitions. [2021-08-21 18:53:42,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:42,381 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:42,381 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:53:42,406 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2021-08-21 18:53:42,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-08-21 18:53:42,605 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:53:42,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:42,605 INFO L82 PathProgramCache]: Analyzing trace with hash 35970933, now seen corresponding path program 52 times [2021-08-21 18:53:42,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:42,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111596250] [2021-08-21 18:53:42,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:42,605 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:42,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:42,684 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:42,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:42,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111596250] [2021-08-21 18:53:42,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111596250] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:42,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723145085] [2021-08-21 18:53:42,685 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:53:42,685 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:42,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:42,685 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:42,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2021-08-21 18:53:45,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:53:45,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:45,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:53:45,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:45,263 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:45,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723145085] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:45,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:45,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:53:45,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407486208] [2021-08-21 18:53:45,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:53:45,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:45,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:53:45,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:53:45,264 INFO L87 Difference]: Start difference. First operand 2484 states and 5357 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:53:45,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:45,350 INFO L93 Difference]: Finished difference Result 2683 states and 5654 transitions. [2021-08-21 18:53:45,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:53:45,350 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:53:45,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:45,353 INFO L225 Difference]: With dead ends: 2683 [2021-08-21 18:53:45,353 INFO L226 Difference]: Without dead ends: 2678 [2021-08-21 18:53:45,353 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.4ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:53:45,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2678 states. [2021-08-21 18:53:45,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2678 to 2481. [2021-08-21 18:53:45,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2481 states, 2480 states have (on average 2.1556451612903227) internal successors, (5346), 2480 states have internal predecessors, (5346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:45,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2481 states to 2481 states and 5346 transitions. [2021-08-21 18:53:45,374 INFO L78 Accepts]: Start accepts. Automaton has 2481 states and 5346 transitions. Word has length 29 [2021-08-21 18:53:45,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:45,374 INFO L470 AbstractCegarLoop]: Abstraction has 2481 states and 5346 transitions. [2021-08-21 18:53:45,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:53:45,374 INFO L276 IsEmpty]: Start isEmpty. Operand 2481 states and 5346 transitions. [2021-08-21 18:53:45,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:45,377 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:45,377 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:53:45,400 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2021-08-21 18:53:45,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-08-21 18:53:45,593 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:53:45,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:45,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1910604413, now seen corresponding path program 53 times [2021-08-21 18:53:45,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:45,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253890730] [2021-08-21 18:53:45,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:45,594 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:45,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:45,671 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:45,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:45,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253890730] [2021-08-21 18:53:45,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253890730] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:45,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979124481] [2021-08-21 18:53:45,672 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:53:45,672 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:45,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:45,672 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:45,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2021-08-21 18:53:48,023 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:53:48,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:48,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:53:48,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:48,158 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:48,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979124481] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:48,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:48,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:53:48,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816272725] [2021-08-21 18:53:48,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:53:48,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:48,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:53:48,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:53:48,159 INFO L87 Difference]: Start difference. First operand 2481 states and 5346 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:53:48,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:48,242 INFO L93 Difference]: Finished difference Result 2711 states and 5680 transitions. [2021-08-21 18:53:48,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:53:48,242 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:53:48,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:48,245 INFO L225 Difference]: With dead ends: 2711 [2021-08-21 18:53:48,245 INFO L226 Difference]: Without dead ends: 2706 [2021-08-21 18:53:48,245 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.7ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:53:48,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2706 states. [2021-08-21 18:53:48,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2706 to 2462. [2021-08-21 18:53:48,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2462 states, 2461 states have (on average 2.1511580658268996) internal successors, (5294), 2461 states have internal predecessors, (5294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:48,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2462 states to 2462 states and 5294 transitions. [2021-08-21 18:53:48,266 INFO L78 Accepts]: Start accepts. Automaton has 2462 states and 5294 transitions. Word has length 29 [2021-08-21 18:53:48,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:48,267 INFO L470 AbstractCegarLoop]: Abstraction has 2462 states and 5294 transitions. [2021-08-21 18:53:48,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:53:48,267 INFO L276 IsEmpty]: Start isEmpty. Operand 2462 states and 5294 transitions. [2021-08-21 18:53:48,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:48,269 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:48,269 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:53:48,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2021-08-21 18:53:48,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-08-21 18:53:48,483 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:53:48,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:48,484 INFO L82 PathProgramCache]: Analyzing trace with hash 136457149, now seen corresponding path program 54 times [2021-08-21 18:53:48,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:48,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305786819] [2021-08-21 18:53:48,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:48,484 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:48,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:48,558 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:53:48,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:48,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305786819] [2021-08-21 18:53:48,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305786819] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:48,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082892062] [2021-08-21 18:53:48,558 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:53:48,558 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:48,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:48,559 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:48,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2021-08-21 18:53:50,894 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:53:50,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:50,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:53:50,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:51,025 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:53:51,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082892062] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:51,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:51,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:53:51,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117920658] [2021-08-21 18:53:51,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:53:51,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:51,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:53:51,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:53:51,026 INFO L87 Difference]: Start difference. First operand 2462 states and 5294 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:53:51,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:51,095 INFO L93 Difference]: Finished difference Result 2733 states and 5740 transitions. [2021-08-21 18:53:51,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:53:51,095 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:53:51,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:51,099 INFO L225 Difference]: With dead ends: 2733 [2021-08-21 18:53:51,099 INFO L226 Difference]: Without dead ends: 2724 [2021-08-21 18:53:51,099 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.4ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:53:51,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2724 states. [2021-08-21 18:53:51,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2724 to 2502. [2021-08-21 18:53:51,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2502 states, 2501 states have (on average 2.1535385845661734) internal successors, (5386), 2501 states have internal predecessors, (5386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:51,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2502 states to 2502 states and 5386 transitions. [2021-08-21 18:53:51,125 INFO L78 Accepts]: Start accepts. Automaton has 2502 states and 5386 transitions. Word has length 29 [2021-08-21 18:53:51,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:51,125 INFO L470 AbstractCegarLoop]: Abstraction has 2502 states and 5386 transitions. [2021-08-21 18:53:51,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:53:51,125 INFO L276 IsEmpty]: Start isEmpty. Operand 2502 states and 5386 transitions. [2021-08-21 18:53:51,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:51,128 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:51,128 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:53:51,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2021-08-21 18:53:51,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:51,352 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:53:51,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:51,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1439009031, now seen corresponding path program 55 times [2021-08-21 18:53:51,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:51,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596360986] [2021-08-21 18:53:51,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:51,353 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:51,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:51,442 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:53:51,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:51,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596360986] [2021-08-21 18:53:51,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596360986] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:51,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112316057] [2021-08-21 18:53:51,443 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:53:51,443 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:51,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:51,444 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:51,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2021-08-21 18:53:53,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:53,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:53:53,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:54,010 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:53:54,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112316057] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:54,011 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:54,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:53:54,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347291376] [2021-08-21 18:53:54,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:53:54,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:54,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:53:54,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:53:54,011 INFO L87 Difference]: Start difference. First operand 2502 states and 5386 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:53:54,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:54,078 INFO L93 Difference]: Finished difference Result 2737 states and 5726 transitions. [2021-08-21 18:53:54,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:53:54,078 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:53:54,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:54,081 INFO L225 Difference]: With dead ends: 2737 [2021-08-21 18:53:54,081 INFO L226 Difference]: Without dead ends: 2732 [2021-08-21 18:53:54,081 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.2ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:53:54,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2732 states. [2021-08-21 18:53:54,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2732 to 2502. [2021-08-21 18:53:54,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2502 states, 2501 states have (on average 2.150339864054378) internal successors, (5378), 2501 states have internal predecessors, (5378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:54,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2502 states to 2502 states and 5378 transitions. [2021-08-21 18:53:54,106 INFO L78 Accepts]: Start accepts. Automaton has 2502 states and 5378 transitions. Word has length 29 [2021-08-21 18:53:54,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:54,106 INFO L470 AbstractCegarLoop]: Abstraction has 2502 states and 5378 transitions. [2021-08-21 18:53:54,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:53:54,106 INFO L276 IsEmpty]: Start isEmpty. Operand 2502 states and 5378 transitions. [2021-08-21 18:53:54,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:54,109 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:54,109 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:53:54,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2021-08-21 18:53:54,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-08-21 18:53:54,325 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:53:54,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:54,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1544282993, now seen corresponding path program 56 times [2021-08-21 18:53:54,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:54,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002790561] [2021-08-21 18:53:54,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:54,325 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:54,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:54,409 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:53:54,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:54,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002790561] [2021-08-21 18:53:54,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002790561] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:54,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421446075] [2021-08-21 18:53:54,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:54,410 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:54,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:54,410 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:54,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2021-08-21 18:53:56,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:56,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:56,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:53:56,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:56,982 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:53:56,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421446075] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:56,982 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:56,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:53:56,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054397608] [2021-08-21 18:53:56,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:53:56,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:56,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:53:56,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:53:56,983 INFO L87 Difference]: Start difference. First operand 2502 states and 5378 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:53:57,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:57,056 INFO L93 Difference]: Finished difference Result 2768 states and 5777 transitions. [2021-08-21 18:53:57,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:53:57,057 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:53:57,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:57,060 INFO L225 Difference]: With dead ends: 2768 [2021-08-21 18:53:57,060 INFO L226 Difference]: Without dead ends: 2763 [2021-08-21 18:53:57,060 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.1ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:53:57,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2763 states. [2021-08-21 18:53:57,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2763 to 2515. [2021-08-21 18:53:57,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2515 states, 2514 states have (on average 2.152744630071599) internal successors, (5412), 2514 states have internal predecessors, (5412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:57,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2515 states to 2515 states and 5412 transitions. [2021-08-21 18:53:57,083 INFO L78 Accepts]: Start accepts. Automaton has 2515 states and 5412 transitions. Word has length 29 [2021-08-21 18:53:57,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:57,083 INFO L470 AbstractCegarLoop]: Abstraction has 2515 states and 5412 transitions. [2021-08-21 18:53:57,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:53:57,083 INFO L276 IsEmpty]: Start isEmpty. Operand 2515 states and 5412 transitions. [2021-08-21 18:53:57,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:57,085 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:57,086 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:53:57,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2021-08-21 18:53:57,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:57,299 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:53:57,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:57,300 INFO L82 PathProgramCache]: Analyzing trace with hash -303620939, now seen corresponding path program 57 times [2021-08-21 18:53:57,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:57,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641573693] [2021-08-21 18:53:57,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:57,300 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:57,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:57,377 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:53:57,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:57,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641573693] [2021-08-21 18:53:57,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641573693] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:57,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37347154] [2021-08-21 18:53:57,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:53:57,377 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:57,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:57,378 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:53:57,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2021-08-21 18:53:59,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:53:59,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:59,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:53:59,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:59,945 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:53:59,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37347154] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:59,945 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:59,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:53:59,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003913909] [2021-08-21 18:53:59,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:53:59,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:59,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:53:59,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:53:59,946 INFO L87 Difference]: Start difference. First operand 2515 states and 5412 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:54:00,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:00,016 INFO L93 Difference]: Finished difference Result 2777 states and 5828 transitions. [2021-08-21 18:54:00,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:54:00,017 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:54:00,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:00,020 INFO L225 Difference]: With dead ends: 2777 [2021-08-21 18:54:00,020 INFO L226 Difference]: Without dead ends: 2768 [2021-08-21 18:54:00,020 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.2ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:54:00,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2768 states. [2021-08-21 18:54:00,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2768 to 2504. [2021-08-21 18:54:00,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2504 states, 2503 states have (on average 2.1530163803435878) internal successors, (5389), 2503 states have internal predecessors, (5389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:00,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2504 states to 2504 states and 5389 transitions. [2021-08-21 18:54:00,040 INFO L78 Accepts]: Start accepts. Automaton has 2504 states and 5389 transitions. Word has length 29 [2021-08-21 18:54:00,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:00,040 INFO L470 AbstractCegarLoop]: Abstraction has 2504 states and 5389 transitions. [2021-08-21 18:54:00,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:54:00,041 INFO L276 IsEmpty]: Start isEmpty. Operand 2504 states and 5389 transitions. [2021-08-21 18:54:00,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:54:00,043 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:00,043 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:54:00,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2021-08-21 18:54:00,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:00,269 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:54:00,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:00,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1111343349, now seen corresponding path program 58 times [2021-08-21 18:54:00,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:00,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622480358] [2021-08-21 18:54:00,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:00,269 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:00,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:00,353 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:54:00,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:00,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622480358] [2021-08-21 18:54:00,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622480358] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:00,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090198860] [2021-08-21 18:54:00,353 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:54:00,353 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:00,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:00,354 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:54:00,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2021-08-21 18:54:02,846 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:54:02,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:02,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:54:02,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:03,033 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:54:03,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090198860] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:03,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:03,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:54:03,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911879290] [2021-08-21 18:54:03,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:54:03,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:03,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:54:03,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:54:03,034 INFO L87 Difference]: Start difference. First operand 2504 states and 5389 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:54:03,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:03,108 INFO L93 Difference]: Finished difference Result 2744 states and 5765 transitions. [2021-08-21 18:54:03,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:54:03,108 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:54:03,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:03,111 INFO L225 Difference]: With dead ends: 2744 [2021-08-21 18:54:03,111 INFO L226 Difference]: Without dead ends: 2739 [2021-08-21 18:54:03,111 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.3ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:54:03,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2739 states. [2021-08-21 18:54:03,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2739 to 2511. [2021-08-21 18:54:03,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2511 states, 2510 states have (on average 2.154183266932271) internal successors, (5407), 2510 states have internal predecessors, (5407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:03,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2511 states to 2511 states and 5407 transitions. [2021-08-21 18:54:03,132 INFO L78 Accepts]: Start accepts. Automaton has 2511 states and 5407 transitions. Word has length 29 [2021-08-21 18:54:03,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:03,132 INFO L470 AbstractCegarLoop]: Abstraction has 2511 states and 5407 transitions. [2021-08-21 18:54:03,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:54:03,132 INFO L276 IsEmpty]: Start isEmpty. Operand 2511 states and 5407 transitions. [2021-08-21 18:54:03,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:54:03,135 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:03,135 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:54:03,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2021-08-21 18:54:03,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:03,357 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:54:03,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:03,357 INFO L82 PathProgramCache]: Analyzing trace with hash -736560583, now seen corresponding path program 59 times [2021-08-21 18:54:03,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:03,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825856261] [2021-08-21 18:54:03,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:03,357 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:03,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:03,433 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:54:03,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:03,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825856261] [2021-08-21 18:54:03,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825856261] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:03,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464094260] [2021-08-21 18:54:03,433 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:54:03,433 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:03,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:03,434 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:54:03,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2021-08-21 18:54:05,847 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:54:05,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:05,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:54:05,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:05,974 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:54:05,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464094260] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:05,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:05,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:54:05,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180677668] [2021-08-21 18:54:05,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:54:05,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:05,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:54:05,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:54:05,975 INFO L87 Difference]: Start difference. First operand 2511 states and 5407 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:54:06,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:06,040 INFO L93 Difference]: Finished difference Result 2746 states and 5782 transitions. [2021-08-21 18:54:06,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:54:06,041 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:54:06,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:06,044 INFO L225 Difference]: With dead ends: 2746 [2021-08-21 18:54:06,044 INFO L226 Difference]: Without dead ends: 2737 [2021-08-21 18:54:06,044 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.3ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:54:06,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2737 states. [2021-08-21 18:54:06,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2737 to 2506. [2021-08-21 18:54:06,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2506 states, 2505 states have (on average 2.15249500998004) internal successors, (5392), 2505 states have internal predecessors, (5392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:06,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2506 states to 2506 states and 5392 transitions. [2021-08-21 18:54:06,065 INFO L78 Accepts]: Start accepts. Automaton has 2506 states and 5392 transitions. Word has length 29 [2021-08-21 18:54:06,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:06,065 INFO L470 AbstractCegarLoop]: Abstraction has 2506 states and 5392 transitions. [2021-08-21 18:54:06,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:54:06,065 INFO L276 IsEmpty]: Start isEmpty. Operand 2506 states and 5392 transitions. [2021-08-21 18:54:06,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:54:06,067 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:06,068 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:54:06,091 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2021-08-21 18:54:06,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:06,281 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:54:06,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:06,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1856975613, now seen corresponding path program 60 times [2021-08-21 18:54:06,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:06,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43872086] [2021-08-21 18:54:06,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:06,281 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:06,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:06,356 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:06,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:06,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43872086] [2021-08-21 18:54:06,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43872086] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:06,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014512329] [2021-08-21 18:54:06,357 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:54:06,357 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:06,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:06,358 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:54:06,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2021-08-21 18:54:08,874 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 18:54:08,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:08,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:54:08,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:09,004 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:09,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014512329] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:09,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:09,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:54:09,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232015551] [2021-08-21 18:54:09,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:54:09,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:09,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:54:09,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:54:09,006 INFO L87 Difference]: Start difference. First operand 2506 states and 5392 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:54:09,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:09,077 INFO L93 Difference]: Finished difference Result 2717 states and 5716 transitions. [2021-08-21 18:54:09,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:54:09,077 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:54:09,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:09,080 INFO L225 Difference]: With dead ends: 2717 [2021-08-21 18:54:09,080 INFO L226 Difference]: Without dead ends: 2712 [2021-08-21 18:54:09,080 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.8ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:54:09,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2712 states. [2021-08-21 18:54:09,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2712 to 2478. [2021-08-21 18:54:09,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.1461445296729917) internal successors, (5316), 2477 states have internal predecessors, (5316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:09,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 5316 transitions. [2021-08-21 18:54:09,101 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 5316 transitions. Word has length 29 [2021-08-21 18:54:09,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:09,101 INFO L470 AbstractCegarLoop]: Abstraction has 2478 states and 5316 transitions. [2021-08-21 18:54:09,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:54:09,101 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 5316 transitions. [2021-08-21 18:54:09,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:54:09,104 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:09,104 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:09,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2021-08-21 18:54:09,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable154 [2021-08-21 18:54:09,325 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:54:09,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:09,325 INFO L82 PathProgramCache]: Analyzing trace with hash 552263813, now seen corresponding path program 21 times [2021-08-21 18:54:09,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:09,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980435993] [2021-08-21 18:54:09,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:09,325 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:09,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:09,404 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:09,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:09,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980435993] [2021-08-21 18:54:09,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980435993] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:09,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346228523] [2021-08-21 18:54:09,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:54:09,405 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:09,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:09,406 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:54:09,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2021-08-21 18:54:11,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:54:11,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:11,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:54:11,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:12,098 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:12,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346228523] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:12,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:12,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:54:12,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522862619] [2021-08-21 18:54:12,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:54:12,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:12,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:54:12,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:54:12,099 INFO L87 Difference]: Start difference. First operand 2478 states and 5316 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:54:12,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:12,176 INFO L93 Difference]: Finished difference Result 2773 states and 5760 transitions. [2021-08-21 18:54:12,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:54:12,176 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:54:12,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:12,198 INFO L225 Difference]: With dead ends: 2773 [2021-08-21 18:54:12,199 INFO L226 Difference]: Without dead ends: 2768 [2021-08-21 18:54:12,199 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.9ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:54:12,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2768 states. [2021-08-21 18:54:12,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2768 to 2489. [2021-08-21 18:54:12,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2489 states, 2488 states have (on average 2.1463022508038585) internal successors, (5340), 2488 states have internal predecessors, (5340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:12,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2489 states to 2489 states and 5340 transitions. [2021-08-21 18:54:12,273 INFO L78 Accepts]: Start accepts. Automaton has 2489 states and 5340 transitions. Word has length 29 [2021-08-21 18:54:12,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:12,274 INFO L470 AbstractCegarLoop]: Abstraction has 2489 states and 5340 transitions. [2021-08-21 18:54:12,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:54:12,274 INFO L276 IsEmpty]: Start isEmpty. Operand 2489 states and 5340 transitions. [2021-08-21 18:54:12,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:54:12,276 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:12,276 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:54:12,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2021-08-21 18:54:12,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-08-21 18:54:12,499 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:54:12,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:12,500 INFO L82 PathProgramCache]: Analyzing trace with hash 694854409, now seen corresponding path program 61 times [2021-08-21 18:54:12,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:12,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425944215] [2021-08-21 18:54:12,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:12,500 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:12,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:12,587 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:12,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:12,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425944215] [2021-08-21 18:54:12,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425944215] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:12,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376086275] [2021-08-21 18:54:12,588 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:54:12,588 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:12,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:12,588 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:54:12,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2021-08-21 18:54:15,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:15,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:54:15,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:15,279 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:15,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376086275] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:15,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:15,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:54:15,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150409758] [2021-08-21 18:54:15,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:54:15,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:15,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:54:15,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:54:15,280 INFO L87 Difference]: Start difference. First operand 2489 states and 5340 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:54:15,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:15,390 INFO L93 Difference]: Finished difference Result 2757 states and 5727 transitions. [2021-08-21 18:54:15,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:54:15,391 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:54:15,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:15,395 INFO L225 Difference]: With dead ends: 2757 [2021-08-21 18:54:15,396 INFO L226 Difference]: Without dead ends: 2752 [2021-08-21 18:54:15,396 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.3ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:54:15,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2752 states. [2021-08-21 18:54:15,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2752 to 2493. [2021-08-21 18:54:15,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2493 states, 2492 states have (on average 2.146067415730337) internal successors, (5348), 2492 states have internal predecessors, (5348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:15,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2493 states to 2493 states and 5348 transitions. [2021-08-21 18:54:15,421 INFO L78 Accepts]: Start accepts. Automaton has 2493 states and 5348 transitions. Word has length 29 [2021-08-21 18:54:15,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:15,421 INFO L470 AbstractCegarLoop]: Abstraction has 2493 states and 5348 transitions. [2021-08-21 18:54:15,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:54:15,421 INFO L276 IsEmpty]: Start isEmpty. Operand 2493 states and 5348 transitions. [2021-08-21 18:54:15,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:54:15,424 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:15,424 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:54:15,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2021-08-21 18:54:15,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:15,646 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:54:15,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:15,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1839839053, now seen corresponding path program 62 times [2021-08-21 18:54:15,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:15,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221458961] [2021-08-21 18:54:15,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:15,647 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:15,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:15,722 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:54:15,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:15,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221458961] [2021-08-21 18:54:15,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221458961] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:15,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127597107] [2021-08-21 18:54:15,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:54:15,723 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:15,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:15,723 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:54:15,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2021-08-21 18:54:18,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:54:18,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:18,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:54:18,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:18,279 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:54:18,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127597107] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:18,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:18,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:54:18,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599164654] [2021-08-21 18:54:18,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:54:18,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:18,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:54:18,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:54:18,280 INFO L87 Difference]: Start difference. First operand 2493 states and 5348 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:54:18,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:18,352 INFO L93 Difference]: Finished difference Result 2973 states and 6205 transitions. [2021-08-21 18:54:18,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:54:18,353 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:54:18,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:18,357 INFO L225 Difference]: With dead ends: 2973 [2021-08-21 18:54:18,357 INFO L226 Difference]: Without dead ends: 2964 [2021-08-21 18:54:18,357 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.9ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:54:18,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2964 states. [2021-08-21 18:54:18,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2964 to 2639. [2021-08-21 18:54:18,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2639 states, 2638 states have (on average 2.143290371493556) internal successors, (5654), 2638 states have internal predecessors, (5654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:18,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2639 states to 2639 states and 5654 transitions. [2021-08-21 18:54:18,420 INFO L78 Accepts]: Start accepts. Automaton has 2639 states and 5654 transitions. Word has length 29 [2021-08-21 18:54:18,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:18,420 INFO L470 AbstractCegarLoop]: Abstraction has 2639 states and 5654 transitions. [2021-08-21 18:54:18,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:54:18,421 INFO L276 IsEmpty]: Start isEmpty. Operand 2639 states and 5654 transitions. [2021-08-21 18:54:18,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:54:18,423 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:18,423 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:54:18,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2021-08-21 18:54:18,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-08-21 18:54:18,646 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:54:18,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:18,646 INFO L82 PathProgramCache]: Analyzing trace with hash 264372873, now seen corresponding path program 63 times [2021-08-21 18:54:18,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:18,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432649267] [2021-08-21 18:54:18,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:18,647 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:18,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:18,722 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:18,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:18,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432649267] [2021-08-21 18:54:18,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432649267] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:18,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404371292] [2021-08-21 18:54:18,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:54:18,723 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:18,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:18,723 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:54:18,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2021-08-21 18:54:21,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:54:21,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:21,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:54:21,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:21,557 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:21,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404371292] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:21,557 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:21,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:54:21,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752969944] [2021-08-21 18:54:21,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:54:21,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:21,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:54:21,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:54:21,558 INFO L87 Difference]: Start difference. First operand 2639 states and 5654 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:54:21,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:21,637 INFO L93 Difference]: Finished difference Result 2981 states and 6211 transitions. [2021-08-21 18:54:21,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:54:21,637 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:54:21,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:21,641 INFO L225 Difference]: With dead ends: 2981 [2021-08-21 18:54:21,641 INFO L226 Difference]: Without dead ends: 2976 [2021-08-21 18:54:21,641 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.9ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:54:21,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2976 states. [2021-08-21 18:54:21,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2976 to 2674. [2021-08-21 18:54:21,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2674 states, 2673 states have (on average 2.1421623643845864) internal successors, (5726), 2673 states have internal predecessors, (5726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:21,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2674 states to 2674 states and 5726 transitions. [2021-08-21 18:54:21,666 INFO L78 Accepts]: Start accepts. Automaton has 2674 states and 5726 transitions. Word has length 29 [2021-08-21 18:54:21,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:21,666 INFO L470 AbstractCegarLoop]: Abstraction has 2674 states and 5726 transitions. [2021-08-21 18:54:21,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:54:21,667 INFO L276 IsEmpty]: Start isEmpty. Operand 2674 states and 5726 transitions. [2021-08-21 18:54:21,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:54:21,669 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:21,669 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:21,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2021-08-21 18:54:21,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-08-21 18:54:21,887 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:54:21,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:21,887 INFO L82 PathProgramCache]: Analyzing trace with hash -666457711, now seen corresponding path program 22 times [2021-08-21 18:54:21,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:21,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127303141] [2021-08-21 18:54:21,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:21,888 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:21,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:21,983 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:21,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:21,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127303141] [2021-08-21 18:54:21,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127303141] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:21,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154992707] [2021-08-21 18:54:21,984 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:54:21,984 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:21,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:21,984 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:54:21,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2021-08-21 18:54:24,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:54:24,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:24,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:54:24,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:24,722 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:24,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154992707] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:24,722 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:24,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:54:24,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910416015] [2021-08-21 18:54:24,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:54:24,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:24,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:54:24,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:54:24,723 INFO L87 Difference]: Start difference. First operand 2674 states and 5726 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:54:24,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:24,802 INFO L93 Difference]: Finished difference Result 2946 states and 6121 transitions. [2021-08-21 18:54:24,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:54:24,802 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:54:24,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:24,807 INFO L225 Difference]: With dead ends: 2946 [2021-08-21 18:54:24,807 INFO L226 Difference]: Without dead ends: 2941 [2021-08-21 18:54:24,807 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.8ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:54:24,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2941 states. [2021-08-21 18:54:24,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2941 to 2707. [2021-08-21 18:54:24,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2707 states, 2706 states have (on average 2.1437546193643753) internal successors, (5801), 2706 states have internal predecessors, (5801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:24,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2707 states to 2707 states and 5801 transitions. [2021-08-21 18:54:24,842 INFO L78 Accepts]: Start accepts. Automaton has 2707 states and 5801 transitions. Word has length 29 [2021-08-21 18:54:24,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:24,842 INFO L470 AbstractCegarLoop]: Abstraction has 2707 states and 5801 transitions. [2021-08-21 18:54:24,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:54:24,842 INFO L276 IsEmpty]: Start isEmpty. Operand 2707 states and 5801 transitions. [2021-08-21 18:54:24,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:54:24,845 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:24,845 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:54:24,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2021-08-21 18:54:25,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-08-21 18:54:25,067 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:54:25,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:25,068 INFO L82 PathProgramCache]: Analyzing trace with hash -523867115, now seen corresponding path program 64 times [2021-08-21 18:54:25,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:25,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452423110] [2021-08-21 18:54:25,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:25,068 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:25,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:25,144 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:25,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:25,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452423110] [2021-08-21 18:54:25,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452423110] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:25,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300755674] [2021-08-21 18:54:25,145 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:54:25,145 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:25,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:25,145 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:54:25,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2021-08-21 18:54:27,826 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:54:27,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:27,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:54:27,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:27,962 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:27,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300755674] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:27,962 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:27,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:54:27,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798216227] [2021-08-21 18:54:27,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:54:27,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:27,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:54:27,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:54:27,963 INFO L87 Difference]: Start difference. First operand 2707 states and 5801 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:54:28,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:28,046 INFO L93 Difference]: Finished difference Result 2954 states and 6142 transitions. [2021-08-21 18:54:28,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:54:28,047 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:54:28,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:28,066 INFO L225 Difference]: With dead ends: 2954 [2021-08-21 18:54:28,066 INFO L226 Difference]: Without dead ends: 2949 [2021-08-21 18:54:28,066 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.6ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:54:28,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2949 states. [2021-08-21 18:54:28,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2949 to 2719. [2021-08-21 18:54:28,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2719 states, 2718 states have (on average 2.1456953642384105) internal successors, (5832), 2718 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:28,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2719 states to 2719 states and 5832 transitions. [2021-08-21 18:54:28,121 INFO L78 Accepts]: Start accepts. Automaton has 2719 states and 5832 transitions. Word has length 29 [2021-08-21 18:54:28,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:28,122 INFO L470 AbstractCegarLoop]: Abstraction has 2719 states and 5832 transitions. [2021-08-21 18:54:28,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:54:28,122 INFO L276 IsEmpty]: Start isEmpty. Operand 2719 states and 5832 transitions. [2021-08-21 18:54:28,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:54:28,124 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:28,124 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:54:28,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2021-08-21 18:54:28,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:28,337 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:54:28,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:28,338 INFO L82 PathProgramCache]: Analyzing trace with hash 621117529, now seen corresponding path program 65 times [2021-08-21 18:54:28,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:28,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139923087] [2021-08-21 18:54:28,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:28,338 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:28,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:28,418 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:54:28,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:28,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139923087] [2021-08-21 18:54:28,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139923087] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:28,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607759516] [2021-08-21 18:54:28,418 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:54:28,418 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:28,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:28,419 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:54:28,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2021-08-21 18:54:31,080 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:54:31,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:31,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:54:31,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:31,215 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:54:31,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607759516] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:31,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:31,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:54:31,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186061125] [2021-08-21 18:54:31,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:54:31,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:31,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:54:31,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:54:31,216 INFO L87 Difference]: Start difference. First operand 2719 states and 5832 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:54:31,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:31,290 INFO L93 Difference]: Finished difference Result 3075 states and 6447 transitions. [2021-08-21 18:54:31,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:54:31,291 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:54:31,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:31,315 INFO L225 Difference]: With dead ends: 3075 [2021-08-21 18:54:31,316 INFO L226 Difference]: Without dead ends: 3066 [2021-08-21 18:54:31,316 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.3ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:54:31,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3066 states. [2021-08-21 18:54:31,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3066 to 2789. [2021-08-21 18:54:31,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2789 states, 2788 states have (on average 2.149210903873745) internal successors, (5992), 2788 states have internal predecessors, (5992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:31,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2789 states to 2789 states and 5992 transitions. [2021-08-21 18:54:31,369 INFO L78 Accepts]: Start accepts. Automaton has 2789 states and 5992 transitions. Word has length 29 [2021-08-21 18:54:31,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:31,370 INFO L470 AbstractCegarLoop]: Abstraction has 2789 states and 5992 transitions. [2021-08-21 18:54:31,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:54:31,370 INFO L276 IsEmpty]: Start isEmpty. Operand 2789 states and 5992 transitions. [2021-08-21 18:54:31,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:54:31,372 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:31,372 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:54:31,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Forceful destruction successful, exit code 0 [2021-08-21 18:54:31,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:31,609 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:54:31,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:31,609 INFO L82 PathProgramCache]: Analyzing trace with hash -954348651, now seen corresponding path program 66 times [2021-08-21 18:54:31,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:31,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213418801] [2021-08-21 18:54:31,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:31,609 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:31,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:31,694 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:31,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:31,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213418801] [2021-08-21 18:54:31,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213418801] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:31,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117658668] [2021-08-21 18:54:31,695 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:54:31,695 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:31,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:31,696 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:54:31,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2021-08-21 18:54:34,373 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:54:34,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:34,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:54:34,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:34,512 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:34,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117658668] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:34,512 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:34,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:54:34,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631932454] [2021-08-21 18:54:34,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:54:34,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:34,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:54:34,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:54:34,513 INFO L87 Difference]: Start difference. First operand 2789 states and 5992 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:54:34,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:34,591 INFO L93 Difference]: Finished difference Result 3062 states and 6416 transitions. [2021-08-21 18:54:34,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:54:34,591 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:54:34,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:34,608 INFO L225 Difference]: With dead ends: 3062 [2021-08-21 18:54:34,608 INFO L226 Difference]: Without dead ends: 3057 [2021-08-21 18:54:34,608 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.2ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:54:34,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3057 states. [2021-08-21 18:54:34,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3057 to 2800. [2021-08-21 18:54:34,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2800 states, 2799 states have (on average 2.148267238299393) internal successors, (6013), 2799 states have internal predecessors, (6013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:34,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2800 states to 2800 states and 6013 transitions. [2021-08-21 18:54:34,664 INFO L78 Accepts]: Start accepts. Automaton has 2800 states and 6013 transitions. Word has length 29 [2021-08-21 18:54:34,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:34,664 INFO L470 AbstractCegarLoop]: Abstraction has 2800 states and 6013 transitions. [2021-08-21 18:54:34,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:54:34,664 INFO L276 IsEmpty]: Start isEmpty. Operand 2800 states and 6013 transitions. [2021-08-21 18:54:34,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:54:34,667 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:34,667 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:54:34,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2021-08-21 18:54:34,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:34,897 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:54:34,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:34,897 INFO L82 PathProgramCache]: Analyzing trace with hash -665262775, now seen corresponding path program 67 times [2021-08-21 18:54:34,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:34,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335756805] [2021-08-21 18:54:34,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:34,897 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:34,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:34,981 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:34,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:34,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335756805] [2021-08-21 18:54:34,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335756805] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:34,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145588245] [2021-08-21 18:54:34,981 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:54:34,981 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:34,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:34,982 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:54:34,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2021-08-21 18:54:37,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:37,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:54:37,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:37,730 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:37,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145588245] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:37,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:37,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:54:37,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970777173] [2021-08-21 18:54:37,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:54:37,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:37,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:54:37,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:54:37,731 INFO L87 Difference]: Start difference. First operand 2800 states and 6013 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:54:37,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:37,801 INFO L93 Difference]: Finished difference Result 3124 states and 6542 transitions. [2021-08-21 18:54:37,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:54:37,801 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:54:37,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:37,805 INFO L225 Difference]: With dead ends: 3124 [2021-08-21 18:54:37,805 INFO L226 Difference]: Without dead ends: 3119 [2021-08-21 18:54:37,805 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.6ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:54:37,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3119 states. [2021-08-21 18:54:37,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3119 to 2841. [2021-08-21 18:54:37,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2841 states, 2840 states have (on average 2.148943661971831) internal successors, (6103), 2840 states have internal predecessors, (6103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:37,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2841 states to 2841 states and 6103 transitions. [2021-08-21 18:54:37,830 INFO L78 Accepts]: Start accepts. Automaton has 2841 states and 6103 transitions. Word has length 29 [2021-08-21 18:54:37,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:37,830 INFO L470 AbstractCegarLoop]: Abstraction has 2841 states and 6103 transitions. [2021-08-21 18:54:37,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:54:37,831 INFO L276 IsEmpty]: Start isEmpty. Operand 2841 states and 6103 transitions. [2021-08-21 18:54:37,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:54:37,833 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:37,833 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:37,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2021-08-21 18:54:38,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:38,056 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:54:38,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:38,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1781800589, now seen corresponding path program 23 times [2021-08-21 18:54:38,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:38,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596135827] [2021-08-21 18:54:38,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:38,057 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:38,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:38,130 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:38,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:38,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596135827] [2021-08-21 18:54:38,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596135827] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:38,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544244045] [2021-08-21 18:54:38,130 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:54:38,131 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:38,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:38,131 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:54:38,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2021-08-21 18:54:40,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:54:40,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:40,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:54:40,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:40,905 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:40,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544244045] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:40,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:40,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:54:40,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807085505] [2021-08-21 18:54:40,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:54:40,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:40,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:54:40,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:54:40,906 INFO L87 Difference]: Start difference. First operand 2841 states and 6103 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:54:40,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:40,977 INFO L93 Difference]: Finished difference Result 3178 states and 6656 transitions. [2021-08-21 18:54:40,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:54:40,978 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:54:40,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:40,981 INFO L225 Difference]: With dead ends: 3178 [2021-08-21 18:54:40,981 INFO L226 Difference]: Without dead ends: 3169 [2021-08-21 18:54:40,981 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.9ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:54:40,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3169 states. [2021-08-21 18:54:41,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3169 to 2874. [2021-08-21 18:54:41,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2874 states, 2873 states have (on average 2.1447963800904977) internal successors, (6162), 2873 states have internal predecessors, (6162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:41,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2874 states to 2874 states and 6162 transitions. [2021-08-21 18:54:41,005 INFO L78 Accepts]: Start accepts. Automaton has 2874 states and 6162 transitions. Word has length 29 [2021-08-21 18:54:41,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:41,005 INFO L470 AbstractCegarLoop]: Abstraction has 2874 states and 6162 transitions. [2021-08-21 18:54:41,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:54:41,005 INFO L276 IsEmpty]: Start isEmpty. Operand 2874 states and 6162 transitions. [2021-08-21 18:54:41,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:54:41,008 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:41,008 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:54:41,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2021-08-21 18:54:41,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:41,229 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:54:41,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:41,229 INFO L82 PathProgramCache]: Analyzing trace with hash 2088583113, now seen corresponding path program 68 times [2021-08-21 18:54:41,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:41,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134671838] [2021-08-21 18:54:41,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:41,229 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:41,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:41,323 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:54:41,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:41,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134671838] [2021-08-21 18:54:41,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134671838] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:41,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282521897] [2021-08-21 18:54:41,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:54:41,323 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:41,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:41,324 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:54:41,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2021-08-21 18:54:43,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:54:43,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:43,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:54:43,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:44,073 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:54:44,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282521897] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:44,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:44,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:54:44,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368300989] [2021-08-21 18:54:44,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:54:44,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:44,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:54:44,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:54:44,074 INFO L87 Difference]: Start difference. First operand 2874 states and 6162 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:54:44,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:44,139 INFO L93 Difference]: Finished difference Result 3184 states and 6630 transitions. [2021-08-21 18:54:44,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:54:44,140 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:54:44,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:44,143 INFO L225 Difference]: With dead ends: 3184 [2021-08-21 18:54:44,143 INFO L226 Difference]: Without dead ends: 3179 [2021-08-21 18:54:44,143 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.7ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:54:44,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3179 states. [2021-08-21 18:54:44,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3179 to 2931. [2021-08-21 18:54:44,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2931 states, 2930 states have (on average 2.147440273037543) internal successors, (6292), 2930 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) [2021-08-21 18:54:44,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2931 states to 2931 states and 6292 transitions. [2021-08-21 18:54:44,167 INFO L78 Accepts]: Start accepts. Automaton has 2931 states and 6292 transitions. Word has length 29 [2021-08-21 18:54:44,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:44,167 INFO L470 AbstractCegarLoop]: Abstraction has 2931 states and 6292 transitions. [2021-08-21 18:54:44,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:54:44,167 INFO L276 IsEmpty]: Start isEmpty. Operand 2931 states and 6292 transitions. [2021-08-21 18:54:44,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:54:44,170 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:44,170 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:44,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Forceful destruction successful, exit code 0 [2021-08-21 18:54:44,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:44,394 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:54:44,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:44,394 INFO L82 PathProgramCache]: Analyzing trace with hash 240679181, now seen corresponding path program 24 times [2021-08-21 18:54:44,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:44,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565387816] [2021-08-21 18:54:44,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:44,394 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:44,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:44,470 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:54:44,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:44,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565387816] [2021-08-21 18:54:44,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565387816] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:44,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491576539] [2021-08-21 18:54:44,470 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:54:44,470 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:44,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:44,471 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:54:44,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2021-08-21 18:54:47,211 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:54:47,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:47,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:54:47,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:47,391 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:54:47,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491576539] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:47,391 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:47,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:54:47,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708059965] [2021-08-21 18:54:47,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:54:47,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:47,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:54:47,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:54:47,392 INFO L87 Difference]: Start difference. First operand 2931 states and 6292 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:54:47,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:47,457 INFO L93 Difference]: Finished difference Result 3237 states and 6778 transitions. [2021-08-21 18:54:47,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:54:47,458 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:54:47,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:47,461 INFO L225 Difference]: With dead ends: 3237 [2021-08-21 18:54:47,461 INFO L226 Difference]: Without dead ends: 3228 [2021-08-21 18:54:47,461 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.9ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:54:47,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3228 states. [2021-08-21 18:54:47,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3228 to 2985. [2021-08-21 18:54:47,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2985 states, 2984 states have (on average 2.1410857908847185) internal successors, (6389), 2984 states have internal predecessors, (6389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:47,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2985 states to 2985 states and 6389 transitions. [2021-08-21 18:54:47,487 INFO L78 Accepts]: Start accepts. Automaton has 2985 states and 6389 transitions. Word has length 29 [2021-08-21 18:54:47,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:47,487 INFO L470 AbstractCegarLoop]: Abstraction has 2985 states and 6389 transitions. [2021-08-21 18:54:47,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:54:47,487 INFO L276 IsEmpty]: Start isEmpty. Operand 2985 states and 6389 transitions. [2021-08-21 18:54:47,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:54:47,490 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:47,490 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:54:47,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Forceful destruction successful, exit code 0 [2021-08-21 18:54:47,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-08-21 18:54:47,713 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:54:47,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:47,713 INFO L82 PathProgramCache]: Analyzing trace with hash -2012594491, now seen corresponding path program 69 times [2021-08-21 18:54:47,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:47,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222880290] [2021-08-21 18:54:47,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:47,713 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:47,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:47,792 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:54:47,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:47,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222880290] [2021-08-21 18:54:47,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222880290] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:47,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411704631] [2021-08-21 18:54:47,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:54:47,792 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:47,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:47,793 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:54:47,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2021-08-21 18:54:50,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:54:50,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:50,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:54:50,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:50,763 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:54:50,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411704631] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:50,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:50,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:54:50,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856396780] [2021-08-21 18:54:50,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:54:50,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:50,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:54:50,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:54:50,763 INFO L87 Difference]: Start difference. First operand 2985 states and 6389 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:54:50,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:50,840 INFO L93 Difference]: Finished difference Result 3269 states and 6794 transitions. [2021-08-21 18:54:50,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:54:50,840 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:54:50,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:50,844 INFO L225 Difference]: With dead ends: 3269 [2021-08-21 18:54:50,844 INFO L226 Difference]: Without dead ends: 3264 [2021-08-21 18:54:50,844 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.5ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:54:50,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3264 states. [2021-08-21 18:54:50,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3264 to 3012. [2021-08-21 18:54:50,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3012 states, 3011 states have (on average 2.1444702756559284) internal successors, (6457), 3011 states have internal predecessors, (6457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:50,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3012 states to 3012 states and 6457 transitions. [2021-08-21 18:54:50,870 INFO L78 Accepts]: Start accepts. Automaton has 3012 states and 6457 transitions. Word has length 29 [2021-08-21 18:54:50,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:50,870 INFO L470 AbstractCegarLoop]: Abstraction has 3012 states and 6457 transitions. [2021-08-21 18:54:50,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:54:50,870 INFO L276 IsEmpty]: Start isEmpty. Operand 3012 states and 6457 transitions. [2021-08-21 18:54:50,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:54:50,873 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:50,873 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:54:50,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Forceful destruction successful, exit code 0 [2021-08-21 18:54:51,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-08-21 18:54:51,089 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:54:51,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:51,089 INFO L82 PathProgramCache]: Analyzing trace with hash 434468873, now seen corresponding path program 70 times [2021-08-21 18:54:51,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:51,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471862136] [2021-08-21 18:54:51,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:51,089 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:51,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:51,172 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:54:51,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:51,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471862136] [2021-08-21 18:54:51,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471862136] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:51,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94127646] [2021-08-21 18:54:51,185 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:54:51,185 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:51,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:51,186 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:54:51,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2021-08-21 18:54:54,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:54:54,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:54,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:54:54,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:54,177 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:54:54,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94127646] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:54,178 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:54,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:54:54,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634617015] [2021-08-21 18:54:54,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:54:54,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:54,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:54:54,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:54:54,178 INFO L87 Difference]: Start difference. First operand 3012 states and 6457 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:54:54,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:54,291 INFO L93 Difference]: Finished difference Result 3293 states and 6886 transitions. [2021-08-21 18:54:54,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:54:54,292 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:54:54,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:54,296 INFO L225 Difference]: With dead ends: 3293 [2021-08-21 18:54:54,296 INFO L226 Difference]: Without dead ends: 3284 [2021-08-21 18:54:54,296 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.6ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:54:54,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3284 states. [2021-08-21 18:54:54,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3284 to 3031. [2021-08-21 18:54:54,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3031 states, 3030 states have (on average 2.145214521452145) internal successors, (6500), 3030 states have internal predecessors, (6500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:54,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3031 states to 3031 states and 6500 transitions. [2021-08-21 18:54:54,357 INFO L78 Accepts]: Start accepts. Automaton has 3031 states and 6500 transitions. Word has length 29 [2021-08-21 18:54:54,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:54,357 INFO L470 AbstractCegarLoop]: Abstraction has 3031 states and 6500 transitions. [2021-08-21 18:54:54,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:54:54,357 INFO L276 IsEmpty]: Start isEmpty. Operand 3031 states and 6500 transitions. [2021-08-21 18:54:54,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:54:54,360 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:54,360 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:54:54,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Forceful destruction successful, exit code 0 [2021-08-21 18:54:54,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-08-21 18:54:54,560 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:54:54,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:54,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1819967493, now seen corresponding path program 71 times [2021-08-21 18:54:54,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:54,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592482423] [2021-08-21 18:54:54,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:54,561 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:54,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:54,638 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:54,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:54,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592482423] [2021-08-21 18:54:54,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592482423] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:54,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644154411] [2021-08-21 18:54:54,639 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:54:54,639 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:54,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:54,640 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:54:54,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2021-08-21 18:54:57,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:54:57,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:57,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:54:57,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:57,500 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:57,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644154411] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:57,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:57,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:54:57,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938242191] [2021-08-21 18:54:57,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:54:57,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:57,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:54:57,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:54:57,501 INFO L87 Difference]: Start difference. First operand 3031 states and 6500 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:54:57,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:57,571 INFO L93 Difference]: Finished difference Result 3296 states and 6889 transitions. [2021-08-21 18:54:57,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:54:57,571 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:54:57,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:57,575 INFO L225 Difference]: With dead ends: 3296 [2021-08-21 18:54:57,575 INFO L226 Difference]: Without dead ends: 3291 [2021-08-21 18:54:57,575 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.6ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:54:57,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3291 states. [2021-08-21 18:54:57,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3291 to 3047. [2021-08-21 18:54:57,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3047 states, 3046 states have (on average 2.144123440577807) internal successors, (6531), 3046 states have internal predecessors, (6531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:57,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3047 states to 3047 states and 6531 transitions. [2021-08-21 18:54:57,602 INFO L78 Accepts]: Start accepts. Automaton has 3047 states and 6531 transitions. Word has length 29 [2021-08-21 18:54:57,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:57,603 INFO L470 AbstractCegarLoop]: Abstraction has 3047 states and 6531 transitions. [2021-08-21 18:54:57,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:54:57,603 INFO L276 IsEmpty]: Start isEmpty. Operand 3047 states and 6531 transitions. [2021-08-21 18:54:57,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:54:57,606 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:57,606 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:54:57,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Forceful destruction successful, exit code 0 [2021-08-21 18:54:57,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:57,829 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:54:57,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:57,830 INFO L82 PathProgramCache]: Analyzing trace with hash 773832585, now seen corresponding path program 72 times [2021-08-21 18:54:57,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:57,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596655252] [2021-08-21 18:54:57,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:57,830 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:57,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:57,908 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:57,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:57,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596655252] [2021-08-21 18:54:57,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596655252] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:57,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268710783] [2021-08-21 18:54:57,908 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:54:57,908 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:57,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:57,909 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:54:57,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2021-08-21 18:55:00,744 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:55:00,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:00,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:55:00,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:00,932 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:00,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268710783] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:00,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:00,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:55:00,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051432163] [2021-08-21 18:55:00,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:55:00,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:00,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:55:00,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:55:00,934 INFO L87 Difference]: Start difference. First operand 3047 states and 6531 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:55:01,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:01,027 INFO L93 Difference]: Finished difference Result 3284 states and 6873 transitions. [2021-08-21 18:55:01,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:55:01,027 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:55:01,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:01,032 INFO L225 Difference]: With dead ends: 3284 [2021-08-21 18:55:01,032 INFO L226 Difference]: Without dead ends: 3279 [2021-08-21 18:55:01,033 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.2ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:55:01,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3279 states. [2021-08-21 18:55:01,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3279 to 3056. [2021-08-21 18:55:01,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3056 states, 3055 states have (on average 2.1427168576104747) internal successors, (6546), 3055 states have internal predecessors, (6546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:01,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3056 states to 3056 states and 6546 transitions. [2021-08-21 18:55:01,061 INFO L78 Accepts]: Start accepts. Automaton has 3056 states and 6546 transitions. Word has length 29 [2021-08-21 18:55:01,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:01,061 INFO L470 AbstractCegarLoop]: Abstraction has 3056 states and 6546 transitions. [2021-08-21 18:55:01,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:55:01,061 INFO L276 IsEmpty]: Start isEmpty. Operand 3056 states and 6546 transitions. [2021-08-21 18:55:01,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:55:01,064 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:01,064 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:01,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:01,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:01,288 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:55:01,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:01,288 INFO L82 PathProgramCache]: Analyzing trace with hash 731375753, now seen corresponding path program 17 times [2021-08-21 18:55:01,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:01,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907829052] [2021-08-21 18:55:01,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:01,289 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:01,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:01,370 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:55:01,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:01,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907829052] [2021-08-21 18:55:01,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907829052] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:01,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470403308] [2021-08-21 18:55:01,371 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:55:01,371 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:01,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:01,372 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:55:01,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2021-08-21 18:55:04,338 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:55:04,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:04,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:55:04,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:04,492 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:55:04,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470403308] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:04,492 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:04,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:55:04,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335280072] [2021-08-21 18:55:04,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:55:04,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:04,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:55:04,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:55:04,493 INFO L87 Difference]: Start difference. First operand 3056 states and 6546 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:55:04,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:04,564 INFO L93 Difference]: Finished difference Result 3412 states and 7146 transitions. [2021-08-21 18:55:04,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:55:04,565 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:55:04,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:04,568 INFO L225 Difference]: With dead ends: 3412 [2021-08-21 18:55:04,568 INFO L226 Difference]: Without dead ends: 3379 [2021-08-21 18:55:04,568 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.9ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:55:04,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3379 states. [2021-08-21 18:55:04,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3379 to 3077. [2021-08-21 18:55:04,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3077 states, 3076 states have (on average 2.1394668400520156) internal successors, (6581), 3076 states have internal predecessors, (6581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:04,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3077 states to 3077 states and 6581 transitions. [2021-08-21 18:55:04,599 INFO L78 Accepts]: Start accepts. Automaton has 3077 states and 6581 transitions. Word has length 29 [2021-08-21 18:55:04,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:04,599 INFO L470 AbstractCegarLoop]: Abstraction has 3077 states and 6581 transitions. [2021-08-21 18:55:04,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:55:04,599 INFO L276 IsEmpty]: Start isEmpty. Operand 3077 states and 6581 transitions. [2021-08-21 18:55:04,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:55:04,602 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:04,602 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:55:04,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:04,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:04,817 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:55:04,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:04,817 INFO L82 PathProgramCache]: Analyzing trace with hash 46751685, now seen corresponding path program 73 times [2021-08-21 18:55:04,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:04,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935773805] [2021-08-21 18:55:04,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:04,817 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:04,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:04,899 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:04,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:04,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935773805] [2021-08-21 18:55:04,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935773805] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:04,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590052017] [2021-08-21 18:55:04,900 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:55:04,900 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:04,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:04,901 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:55:04,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2021-08-21 18:55:07,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:07,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:55:07,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:07,968 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:07,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590052017] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:07,968 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:07,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:55:07,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972366522] [2021-08-21 18:55:07,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:55:07,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:07,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:55:07,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:55:07,969 INFO L87 Difference]: Start difference. First operand 3077 states and 6581 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:55:08,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:08,082 INFO L93 Difference]: Finished difference Result 3365 states and 7009 transitions. [2021-08-21 18:55:08,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:55:08,082 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:55:08,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:08,086 INFO L225 Difference]: With dead ends: 3365 [2021-08-21 18:55:08,086 INFO L226 Difference]: Without dead ends: 3360 [2021-08-21 18:55:08,086 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.4ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:55:08,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3360 states. [2021-08-21 18:55:08,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3360 to 3084. [2021-08-21 18:55:08,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3084 states, 3083 states have (on average 2.1410963347388905) internal successors, (6601), 3083 states have internal predecessors, (6601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:08,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3084 states to 3084 states and 6601 transitions. [2021-08-21 18:55:08,114 INFO L78 Accepts]: Start accepts. Automaton has 3084 states and 6601 transitions. Word has length 29 [2021-08-21 18:55:08,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:08,114 INFO L470 AbstractCegarLoop]: Abstraction has 3084 states and 6601 transitions. [2021-08-21 18:55:08,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:55:08,114 INFO L276 IsEmpty]: Start isEmpty. Operand 3084 states and 6601 transitions. [2021-08-21 18:55:08,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:55:08,117 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:08,117 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:55:08,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:08,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2021-08-21 18:55:08,333 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:55:08,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:08,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1976307905, now seen corresponding path program 74 times [2021-08-21 18:55:08,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:08,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875219567] [2021-08-21 18:55:08,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:08,333 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:08,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:08,419 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:08,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:08,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875219567] [2021-08-21 18:55:08,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875219567] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:08,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280549384] [2021-08-21 18:55:08,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:55:08,419 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:08,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:08,420 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:55:08,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2021-08-21 18:55:11,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:55:11,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:11,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:55:11,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:11,539 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:11,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280549384] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:11,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:11,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:55:11,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764420037] [2021-08-21 18:55:11,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:55:11,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:11,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:55:11,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:55:11,540 INFO L87 Difference]: Start difference. First operand 3084 states and 6601 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:55:11,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:11,617 INFO L93 Difference]: Finished difference Result 3346 states and 6989 transitions. [2021-08-21 18:55:11,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:55:11,617 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:55:11,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:11,621 INFO L225 Difference]: With dead ends: 3346 [2021-08-21 18:55:11,621 INFO L226 Difference]: Without dead ends: 3341 [2021-08-21 18:55:11,621 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.6ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:55:11,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3341 states. [2021-08-21 18:55:11,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3341 to 3099. [2021-08-21 18:55:11,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3099 states, 3098 states have (on average 2.143318269851517) internal successors, (6640), 3098 states have internal predecessors, (6640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:11,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3099 states to 3099 states and 6640 transitions. [2021-08-21 18:55:11,648 INFO L78 Accepts]: Start accepts. Automaton has 3099 states and 6640 transitions. Word has length 29 [2021-08-21 18:55:11,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:11,648 INFO L470 AbstractCegarLoop]: Abstraction has 3099 states and 6640 transitions. [2021-08-21 18:55:11,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:55:11,648 INFO L276 IsEmpty]: Start isEmpty. Operand 3099 states and 6640 transitions. [2021-08-21 18:55:11,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:55:11,651 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:11,651 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:55:11,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:11,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:11,865 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:55:11,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:11,866 INFO L82 PathProgramCache]: Analyzing trace with hash 2011803453, now seen corresponding path program 75 times [2021-08-21 18:55:11,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:11,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317804413] [2021-08-21 18:55:11,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:11,866 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:11,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:11,966 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:55:11,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:11,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317804413] [2021-08-21 18:55:11,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317804413] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:11,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946215072] [2021-08-21 18:55:11,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:55:11,967 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:11,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:11,968 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:55:11,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2021-08-21 18:55:14,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:55:14,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:14,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:55:14,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:15,078 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:55:15,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946215072] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:15,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:15,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:55:15,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424848400] [2021-08-21 18:55:15,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:55:15,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:15,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:55:15,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:55:15,079 INFO L87 Difference]: Start difference. First operand 3099 states and 6640 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:55:15,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:15,156 INFO L93 Difference]: Finished difference Result 3365 states and 7030 transitions. [2021-08-21 18:55:15,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:55:15,157 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:55:15,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:15,160 INFO L225 Difference]: With dead ends: 3365 [2021-08-21 18:55:15,160 INFO L226 Difference]: Without dead ends: 3360 [2021-08-21 18:55:15,160 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.4ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:55:15,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3360 states. [2021-08-21 18:55:15,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3360 to 3133. [2021-08-21 18:55:15,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3133 states, 3132 states have (on average 2.1462324393358876) internal successors, (6722), 3132 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) [2021-08-21 18:55:15,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3133 states to 3133 states and 6722 transitions. [2021-08-21 18:55:15,189 INFO L78 Accepts]: Start accepts. Automaton has 3133 states and 6722 transitions. Word has length 29 [2021-08-21 18:55:15,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:15,189 INFO L470 AbstractCegarLoop]: Abstraction has 3133 states and 6722 transitions. [2021-08-21 18:55:15,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:55:15,189 INFO L276 IsEmpty]: Start isEmpty. Operand 3133 states and 6722 transitions. [2021-08-21 18:55:15,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:55:15,193 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:15,193 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:55:15,217 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Ended with exit code 0 [2021-08-21 18:55:15,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:15,409 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:55:15,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:15,409 INFO L82 PathProgramCache]: Analyzing trace with hash 163899521, now seen corresponding path program 76 times [2021-08-21 18:55:15,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:15,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484911125] [2021-08-21 18:55:15,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:15,409 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:15,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:15,549 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:55:15,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:15,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484911125] [2021-08-21 18:55:15,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484911125] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:15,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357844509] [2021-08-21 18:55:15,550 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:55:15,550 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:15,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:15,550 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:55:15,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2021-08-21 18:55:18,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:55:18,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:18,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:55:18,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:18,804 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:55:18,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357844509] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:18,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:18,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:55:18,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453223919] [2021-08-21 18:55:18,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:55:18,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:18,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:55:18,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:55:18,805 INFO L87 Difference]: Start difference. First operand 3133 states and 6722 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:55:18,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:18,876 INFO L93 Difference]: Finished difference Result 3404 states and 7148 transitions. [2021-08-21 18:55:18,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:55:18,876 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:55:18,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:18,880 INFO L225 Difference]: With dead ends: 3404 [2021-08-21 18:55:18,880 INFO L226 Difference]: Without dead ends: 3395 [2021-08-21 18:55:18,880 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 68.6ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:55:18,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3395 states. [2021-08-21 18:55:18,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3395 to 3166. [2021-08-21 18:55:18,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3166 states, 3165 states have (on average 2.1450236966824643) internal successors, (6789), 3165 states have internal predecessors, (6789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:18,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3166 states to 3166 states and 6789 transitions. [2021-08-21 18:55:18,910 INFO L78 Accepts]: Start accepts. Automaton has 3166 states and 6789 transitions. Word has length 29 [2021-08-21 18:55:18,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:18,910 INFO L470 AbstractCegarLoop]: Abstraction has 3166 states and 6789 transitions. [2021-08-21 18:55:18,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:55:18,911 INFO L276 IsEmpty]: Start isEmpty. Operand 3166 states and 6789 transitions. [2021-08-21 18:55:18,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:55:18,914 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:18,914 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:55:18,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:19,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:19,127 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:55:19,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:19,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1537531579, now seen corresponding path program 77 times [2021-08-21 18:55:19,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:19,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344667809] [2021-08-21 18:55:19,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:19,127 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:19,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:19,230 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:19,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:19,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344667809] [2021-08-21 18:55:19,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344667809] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:19,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035907526] [2021-08-21 18:55:19,231 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:55:19,231 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:19,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:19,231 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:55:19,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2021-08-21 18:55:22,221 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:55:22,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:22,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:55:22,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:22,356 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:22,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035907526] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:22,356 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:22,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:55:22,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125920261] [2021-08-21 18:55:22,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:55:22,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:22,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:55:22,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:55:22,357 INFO L87 Difference]: Start difference. First operand 3166 states and 6789 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:55:22,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:22,436 INFO L93 Difference]: Finished difference Result 3460 states and 7243 transitions. [2021-08-21 18:55:22,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:55:22,436 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:55:22,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:22,439 INFO L225 Difference]: With dead ends: 3460 [2021-08-21 18:55:22,439 INFO L226 Difference]: Without dead ends: 3455 [2021-08-21 18:55:22,439 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.3ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:55:22,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3455 states. [2021-08-21 18:55:22,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3455 to 3183. [2021-08-21 18:55:22,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3183 states, 3182 states have (on average 2.145191703331238) internal successors, (6826), 3182 states have internal predecessors, (6826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:22,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3183 states to 3183 states and 6826 transitions. [2021-08-21 18:55:22,470 INFO L78 Accepts]: Start accepts. Automaton has 3183 states and 6826 transitions. Word has length 29 [2021-08-21 18:55:22,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:22,470 INFO L470 AbstractCegarLoop]: Abstraction has 3183 states and 6826 transitions. [2021-08-21 18:55:22,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:55:22,470 INFO L276 IsEmpty]: Start isEmpty. Operand 3183 states and 6826 transitions. [2021-08-21 18:55:22,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:55:22,473 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:22,473 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:55:22,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:22,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:22,688 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:55:22,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:22,688 INFO L82 PathProgramCache]: Analyzing trace with hash 392024641, now seen corresponding path program 78 times [2021-08-21 18:55:22,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:22,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319379521] [2021-08-21 18:55:22,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:22,688 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:22,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:22,762 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:22,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:22,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319379521] [2021-08-21 18:55:22,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319379521] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:22,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342724706] [2021-08-21 18:55:22,763 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:55:22,763 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:22,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:22,764 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:55:22,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2021-08-21 18:55:25,832 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:55:25,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:25,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:55:25,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:25,980 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:25,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342724706] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:25,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:25,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:55:25,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784227610] [2021-08-21 18:55:25,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:55:25,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:25,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:55:25,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:55:25,981 INFO L87 Difference]: Start difference. First operand 3183 states and 6826 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:55:26,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:26,065 INFO L93 Difference]: Finished difference Result 3405 states and 7157 transitions. [2021-08-21 18:55:26,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:55:26,065 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:55:26,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:26,069 INFO L225 Difference]: With dead ends: 3405 [2021-08-21 18:55:26,070 INFO L226 Difference]: Without dead ends: 3400 [2021-08-21 18:55:26,070 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.9ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:55:26,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3400 states. [2021-08-21 18:55:26,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3400 to 3195. [2021-08-21 18:55:26,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3195 states, 3194 states have (on average 2.1449592986850345) internal successors, (6851), 3194 states have internal predecessors, (6851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:26,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3195 states to 3195 states and 6851 transitions. [2021-08-21 18:55:26,104 INFO L78 Accepts]: Start accepts. Automaton has 3195 states and 6851 transitions. Word has length 29 [2021-08-21 18:55:26,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:26,104 INFO L470 AbstractCegarLoop]: Abstraction has 3195 states and 6851 transitions. [2021-08-21 18:55:26,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:55:26,105 INFO L276 IsEmpty]: Start isEmpty. Operand 3195 states and 6851 transitions. [2021-08-21 18:55:26,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:55:26,108 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:26,108 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:26,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:26,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-08-21 18:55:26,321 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:55:26,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:26,321 INFO L82 PathProgramCache]: Analyzing trace with hash -890850939, now seen corresponding path program 17 times [2021-08-21 18:55:26,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:26,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786534426] [2021-08-21 18:55:26,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:26,321 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:26,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:26,414 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:55:26,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:26,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786534426] [2021-08-21 18:55:26,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786534426] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:26,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727821708] [2021-08-21 18:55:26,414 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:55:26,414 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:26,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:26,415 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:55:26,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2021-08-21 18:55:29,585 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:55:29,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:29,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:55:29,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:29,722 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:55:29,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727821708] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:29,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:29,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:55:29,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115415728] [2021-08-21 18:55:29,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:55:29,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:29,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:55:29,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:55:29,723 INFO L87 Difference]: Start difference. First operand 3195 states and 6851 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:55:29,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:29,786 INFO L93 Difference]: Finished difference Result 3807 states and 7968 transitions. [2021-08-21 18:55:29,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:55:29,787 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:55:29,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:29,791 INFO L225 Difference]: With dead ends: 3807 [2021-08-21 18:55:29,791 INFO L226 Difference]: Without dead ends: 3774 [2021-08-21 18:55:29,791 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.5ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:55:29,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3774 states. [2021-08-21 18:55:29,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3774 to 3478. [2021-08-21 18:55:29,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3478 states, 3477 states have (on average 2.1276962899050904) internal successors, (7398), 3477 states have internal predecessors, (7398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:29,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3478 states to 3478 states and 7398 transitions. [2021-08-21 18:55:29,822 INFO L78 Accepts]: Start accepts. Automaton has 3478 states and 7398 transitions. Word has length 29 [2021-08-21 18:55:29,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:29,822 INFO L470 AbstractCegarLoop]: Abstraction has 3478 states and 7398 transitions. [2021-08-21 18:55:29,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:55:29,822 INFO L276 IsEmpty]: Start isEmpty. Operand 3478 states and 7398 transitions. [2021-08-21 18:55:29,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:55:29,826 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:29,826 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:29,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:30,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:30,051 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:55:30,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:30,051 INFO L82 PathProgramCache]: Analyzing trace with hash 446662849, now seen corresponding path program 21 times [2021-08-21 18:55:30,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:30,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435945087] [2021-08-21 18:55:30,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:30,051 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:30,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:30,136 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:30,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:30,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435945087] [2021-08-21 18:55:30,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435945087] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:30,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297355449] [2021-08-21 18:55:30,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:55:30,136 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:30,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:30,137 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:55:30,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2021-08-21 18:55:33,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:55:33,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:33,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:55:33,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:33,357 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:33,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297355449] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:33,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:33,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:55:33,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028093094] [2021-08-21 18:55:33,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:55:33,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:33,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:55:33,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:55:33,358 INFO L87 Difference]: Start difference. First operand 3478 states and 7398 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:55:33,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:33,444 INFO L93 Difference]: Finished difference Result 3782 states and 7839 transitions. [2021-08-21 18:55:33,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:55:33,445 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:55:33,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:33,449 INFO L225 Difference]: With dead ends: 3782 [2021-08-21 18:55:33,449 INFO L226 Difference]: Without dead ends: 3777 [2021-08-21 18:55:33,450 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.7ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:55:33,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3777 states. [2021-08-21 18:55:33,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3777 to 3482. [2021-08-21 18:55:33,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3482 states, 3481 states have (on average 2.128124102269463) internal successors, (7408), 3481 states have internal predecessors, (7408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:33,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3482 states to 3482 states and 7408 transitions. [2021-08-21 18:55:33,483 INFO L78 Accepts]: Start accepts. Automaton has 3482 states and 7408 transitions. Word has length 29 [2021-08-21 18:55:33,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:33,483 INFO L470 AbstractCegarLoop]: Abstraction has 3482 states and 7408 transitions. [2021-08-21 18:55:33,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:55:33,484 INFO L276 IsEmpty]: Start isEmpty. Operand 3482 states and 7408 transitions. [2021-08-21 18:55:33,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:55:33,488 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:33,488 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:55:33,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:33,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-08-21 18:55:33,713 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:55:33,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:33,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1591647493, now seen corresponding path program 79 times [2021-08-21 18:55:33,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:33,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165581185] [2021-08-21 18:55:33,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:33,713 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:33,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:33,810 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:55:33,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:33,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165581185] [2021-08-21 18:55:33,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165581185] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:33,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004173571] [2021-08-21 18:55:33,810 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:55:33,810 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:33,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:33,811 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:55:33,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2021-08-21 18:55:37,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:37,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:55:37,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:37,166 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:55:37,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004173571] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:37,166 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:37,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:55:37,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261501311] [2021-08-21 18:55:37,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:55:37,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:37,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:55:37,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:55:37,167 INFO L87 Difference]: Start difference. First operand 3482 states and 7408 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:55:37,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:37,248 INFO L93 Difference]: Finished difference Result 3992 states and 8317 transitions. [2021-08-21 18:55:37,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:55:37,249 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:55:37,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:37,253 INFO L225 Difference]: With dead ends: 3992 [2021-08-21 18:55:37,253 INFO L226 Difference]: Without dead ends: 3983 [2021-08-21 18:55:37,253 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.9ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:55:37,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3983 states. [2021-08-21 18:55:37,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3983 to 3582. [2021-08-21 18:55:37,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3582 states, 3581 states have (on average 2.136833286791399) internal successors, (7652), 3581 states have internal predecessors, (7652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:37,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3582 states to 3582 states and 7652 transitions. [2021-08-21 18:55:37,287 INFO L78 Accepts]: Start accepts. Automaton has 3582 states and 7652 transitions. Word has length 29 [2021-08-21 18:55:37,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:37,287 INFO L470 AbstractCegarLoop]: Abstraction has 3582 states and 7652 transitions. [2021-08-21 18:55:37,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:55:37,287 INFO L276 IsEmpty]: Start isEmpty. Operand 3582 states and 7652 transitions. [2021-08-21 18:55:37,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:55:37,290 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:37,290 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:55:37,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:37,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:37,515 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:55:37,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:37,515 INFO L82 PathProgramCache]: Analyzing trace with hash 16181313, now seen corresponding path program 80 times [2021-08-21 18:55:37,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:37,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36796463] [2021-08-21 18:55:37,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:37,515 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:37,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:37,600 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:37,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:37,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36796463] [2021-08-21 18:55:37,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36796463] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:37,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549184386] [2021-08-21 18:55:37,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:55:37,600 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:37,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:37,601 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:55:37,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2021-08-21 18:55:40,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:55:40,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:40,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:55:40,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:40,841 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:40,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549184386] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:40,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:40,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:55:40,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123051065] [2021-08-21 18:55:40,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:55:40,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:40,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:55:40,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:55:40,842 INFO L87 Difference]: Start difference. First operand 3582 states and 7652 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:55:40,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:40,933 INFO L93 Difference]: Finished difference Result 3979 states and 8294 transitions. [2021-08-21 18:55:40,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:55:40,934 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:55:40,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:40,938 INFO L225 Difference]: With dead ends: 3979 [2021-08-21 18:55:40,938 INFO L226 Difference]: Without dead ends: 3974 [2021-08-21 18:55:40,939 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.4ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:55:40,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3974 states. [2021-08-21 18:55:40,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3974 to 3608. [2021-08-21 18:55:40,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3608 states, 3607 states have (on average 2.136955919046299) internal successors, (7708), 3607 states have internal predecessors, (7708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:40,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3608 states to 3608 states and 7708 transitions. [2021-08-21 18:55:40,972 INFO L78 Accepts]: Start accepts. Automaton has 3608 states and 7708 transitions. Word has length 29 [2021-08-21 18:55:40,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:40,972 INFO L470 AbstractCegarLoop]: Abstraction has 3608 states and 7708 transitions. [2021-08-21 18:55:40,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:55:40,972 INFO L276 IsEmpty]: Start isEmpty. Operand 3608 states and 7708 transitions. [2021-08-21 18:55:40,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:55:40,976 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:40,976 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:55:41,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:41,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:41,201 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:55:41,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:41,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1295493959, now seen corresponding path program 81 times [2021-08-21 18:55:41,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:41,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661507928] [2021-08-21 18:55:41,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:41,201 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:41,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:41,295 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:41,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:41,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661507928] [2021-08-21 18:55:41,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661507928] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:41,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993052188] [2021-08-21 18:55:41,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:55:41,296 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:41,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:41,296 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:55:41,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2021-08-21 18:55:44,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:55:44,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:44,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:55:44,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:44,695 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:44,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993052188] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:44,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:44,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:55:44,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087111408] [2021-08-21 18:55:44,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:55:44,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:44,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:55:44,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:55:44,697 INFO L87 Difference]: Start difference. First operand 3608 states and 7708 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:55:44,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:44,781 INFO L93 Difference]: Finished difference Result 4015 states and 8395 transitions. [2021-08-21 18:55:44,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:55:44,782 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:55:44,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:44,786 INFO L225 Difference]: With dead ends: 4015 [2021-08-21 18:55:44,786 INFO L226 Difference]: Without dead ends: 4010 [2021-08-21 18:55:44,786 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.7ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:55:44,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4010 states. [2021-08-21 18:55:44,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4010 to 3669. [2021-08-21 18:55:44,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3669 states, 3668 states have (on average 2.1374045801526718) internal successors, (7840), 3668 states have internal predecessors, (7840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:44,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3669 states to 3669 states and 7840 transitions. [2021-08-21 18:55:44,868 INFO L78 Accepts]: Start accepts. Automaton has 3669 states and 7840 transitions. Word has length 29 [2021-08-21 18:55:44,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:44,868 INFO L470 AbstractCegarLoop]: Abstraction has 3669 states and 7840 transitions. [2021-08-21 18:55:44,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:55:44,868 INFO L276 IsEmpty]: Start isEmpty. Operand 3669 states and 7840 transitions. [2021-08-21 18:55:44,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:55:44,872 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:44,872 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:55:44,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:45,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-08-21 18:55:45,089 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:55:45,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:45,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1151569405, now seen corresponding path program 82 times [2021-08-21 18:55:45,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:45,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869600464] [2021-08-21 18:55:45,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:45,090 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:45,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:45,191 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:45,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:45,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869600464] [2021-08-21 18:55:45,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869600464] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:45,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648767858] [2021-08-21 18:55:45,191 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:55:45,191 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:45,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:45,192 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:55:45,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2021-08-21 18:55:48,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:55:48,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:48,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:55:48,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:48,458 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:48,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648767858] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:48,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:48,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:55:48,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83406836] [2021-08-21 18:55:48,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:55:48,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:48,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:55:48,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:55:48,459 INFO L87 Difference]: Start difference. First operand 3669 states and 7840 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:55:48,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:48,557 INFO L93 Difference]: Finished difference Result 4066 states and 8505 transitions. [2021-08-21 18:55:48,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:55:48,557 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:55:48,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:48,562 INFO L225 Difference]: With dead ends: 4066 [2021-08-21 18:55:48,562 INFO L226 Difference]: Without dead ends: 4057 [2021-08-21 18:55:48,562 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.4ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:55:48,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4057 states. [2021-08-21 18:55:48,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4057 to 3702. [2021-08-21 18:55:48,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3702 states, 3701 states have (on average 2.1345582275060795) internal successors, (7900), 3701 states have internal predecessors, (7900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:48,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3702 states to 3702 states and 7900 transitions. [2021-08-21 18:55:48,596 INFO L78 Accepts]: Start accepts. Automaton has 3702 states and 7900 transitions. Word has length 29 [2021-08-21 18:55:48,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:48,596 INFO L470 AbstractCegarLoop]: Abstraction has 3702 states and 7900 transitions. [2021-08-21 18:55:48,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:55:48,596 INFO L276 IsEmpty]: Start isEmpty. Operand 3702 states and 7900 transitions. [2021-08-21 18:55:48,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:55:48,600 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:48,600 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:55:48,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:48,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:48,824 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:55:48,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:48,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1728433603, now seen corresponding path program 83 times [2021-08-21 18:55:48,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:48,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836934312] [2021-08-21 18:55:48,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:48,825 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:48,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:48,916 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:48,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:48,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836934312] [2021-08-21 18:55:48,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836934312] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:48,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375650757] [2021-08-21 18:55:48,916 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:55:48,916 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:48,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:48,917 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:55:48,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2021-08-21 18:55:52,034 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:55:52,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:52,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:55:52,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:52,186 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:52,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375650757] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:52,187 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:52,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:55:52,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664084594] [2021-08-21 18:55:52,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:55:52,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:52,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:55:52,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:55:52,187 INFO L87 Difference]: Start difference. First operand 3702 states and 7900 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:55:52,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:52,279 INFO L93 Difference]: Finished difference Result 4063 states and 8518 transitions. [2021-08-21 18:55:52,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:55:52,279 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:55:52,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:52,284 INFO L225 Difference]: With dead ends: 4063 [2021-08-21 18:55:52,285 INFO L226 Difference]: Without dead ends: 4058 [2021-08-21 18:55:52,285 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.4ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:55:52,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4058 states. [2021-08-21 18:55:52,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4058 to 3751. [2021-08-21 18:55:52,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3751 states, 3750 states have (on average 2.1386666666666665) internal successors, (8020), 3750 states have internal predecessors, (8020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:52,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3751 states to 3751 states and 8020 transitions. [2021-08-21 18:55:52,324 INFO L78 Accepts]: Start accepts. Automaton has 3751 states and 8020 transitions. Word has length 29 [2021-08-21 18:55:52,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:52,324 INFO L470 AbstractCegarLoop]: Abstraction has 3751 states and 8020 transitions. [2021-08-21 18:55:52,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:55:52,325 INFO L276 IsEmpty]: Start isEmpty. Operand 3751 states and 8020 transitions. [2021-08-21 18:55:52,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:55:52,328 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:52,328 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:55:52,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:52,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:52,545 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:55:52,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:52,545 INFO L82 PathProgramCache]: Analyzing trace with hash 718629761, now seen corresponding path program 84 times [2021-08-21 18:55:52,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:52,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716388874] [2021-08-21 18:55:52,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:52,545 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:52,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:52,626 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:52,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:52,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716388874] [2021-08-21 18:55:52,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716388874] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:52,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572242864] [2021-08-21 18:55:52,627 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:55:52,627 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:52,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:52,627 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:55:52,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2021-08-21 18:55:55,831 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:55:55,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:55,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:55:55,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:55,968 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:55,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572242864] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:55,968 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:55,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:55:55,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056308045] [2021-08-21 18:55:55,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:55:55,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:55,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:55:55,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:55:55,969 INFO L87 Difference]: Start difference. First operand 3751 states and 8020 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:55:56,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:56,050 INFO L93 Difference]: Finished difference Result 4106 states and 8608 transitions. [2021-08-21 18:55:56,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:55:56,051 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:55:56,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:56,055 INFO L225 Difference]: With dead ends: 4106 [2021-08-21 18:55:56,055 INFO L226 Difference]: Without dead ends: 4097 [2021-08-21 18:55:56,055 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.3ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:55:56,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4097 states. [2021-08-21 18:55:56,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4097 to 3778. [2021-08-21 18:55:56,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3778 states, 3777 states have (on average 2.1376754037595975) internal successors, (8074), 3777 states have internal predecessors, (8074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:56,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3778 states to 3778 states and 8074 transitions. [2021-08-21 18:55:56,097 INFO L78 Accepts]: Start accepts. Automaton has 3778 states and 8074 transitions. Word has length 29 [2021-08-21 18:55:56,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:56,098 INFO L470 AbstractCegarLoop]: Abstraction has 3778 states and 8074 transitions. [2021-08-21 18:55:56,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:55:56,098 INFO L276 IsEmpty]: Start isEmpty. Operand 3778 states and 8074 transitions. [2021-08-21 18:55:56,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:55:56,102 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:56,102 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:55:56,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:56,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:56,321 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:55:56,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:56,321 INFO L82 PathProgramCache]: Analyzing trace with hash -982801339, now seen corresponding path program 85 times [2021-08-21 18:55:56,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:56,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221841040] [2021-08-21 18:55:56,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:56,321 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:56,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:56,407 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:55:56,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:56,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221841040] [2021-08-21 18:55:56,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221841040] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:56,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119264149] [2021-08-21 18:55:56,408 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:55:56,408 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:56,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:56,409 INFO L229 MonitoredProcess]: Starting monitored process 172 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:55:56,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2021-08-21 18:55:59,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:59,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:55:59,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:59,700 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:55:59,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119264149] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:59,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:59,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:55:59,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664569842] [2021-08-21 18:55:59,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:55:59,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:59,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:55:59,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:55:59,701 INFO L87 Difference]: Start difference. First operand 3778 states and 8074 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:55:59,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:59,785 INFO L93 Difference]: Finished difference Result 4064 states and 8556 transitions. [2021-08-21 18:55:59,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:55:59,785 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:55:59,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:59,790 INFO L225 Difference]: With dead ends: 4064 [2021-08-21 18:55:59,790 INFO L226 Difference]: Without dead ends: 4059 [2021-08-21 18:55:59,790 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.4ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:55:59,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4059 states. [2021-08-21 18:55:59,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4059 to 3811. [2021-08-21 18:55:59,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3811 states, 3810 states have (on average 2.136482939632546) internal successors, (8140), 3810 states have internal predecessors, (8140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:59,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3811 states to 3811 states and 8140 transitions. [2021-08-21 18:55:59,824 INFO L78 Accepts]: Start accepts. Automaton has 3811 states and 8140 transitions. Word has length 29 [2021-08-21 18:55:59,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:59,824 INFO L470 AbstractCegarLoop]: Abstraction has 3811 states and 8140 transitions. [2021-08-21 18:55:59,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:55:59,824 INFO L276 IsEmpty]: Start isEmpty. Operand 3811 states and 8140 transitions. [2021-08-21 18:55:59,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:55:59,828 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:59,828 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:59,852 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Ended with exit code 0 [2021-08-21 18:56:00,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable186 [2021-08-21 18:56:00,052 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:56:00,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:00,053 INFO L82 PathProgramCache]: Analyzing trace with hash 528518333, now seen corresponding path program 22 times [2021-08-21 18:56:00,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:00,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754095341] [2021-08-21 18:56:00,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:00,053 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:00,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:00,149 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:56:00,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:00,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754095341] [2021-08-21 18:56:00,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754095341] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:00,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050125305] [2021-08-21 18:56:00,149 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:56:00,150 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:00,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:00,150 INFO L229 MonitoredProcess]: Starting monitored process 173 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:56:00,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2021-08-21 18:56:03,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:56:03,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:03,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:56:03,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:03,706 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:56:03,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050125305] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:03,706 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:03,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:56:03,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613084540] [2021-08-21 18:56:03,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:56:03,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:03,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:56:03,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:56:03,707 INFO L87 Difference]: Start difference. First operand 3811 states and 8140 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:56:03,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:03,804 INFO L93 Difference]: Finished difference Result 4095 states and 8551 transitions. [2021-08-21 18:56:03,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:56:03,805 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:56:03,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:03,809 INFO L225 Difference]: With dead ends: 4095 [2021-08-21 18:56:03,809 INFO L226 Difference]: Without dead ends: 4090 [2021-08-21 18:56:03,809 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.6ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:56:03,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4090 states. [2021-08-21 18:56:03,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4090 to 3826. [2021-08-21 18:56:03,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3826 states, 3825 states have (on average 2.1393464052287583) internal successors, (8183), 3825 states have internal predecessors, (8183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:03,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3826 states to 3826 states and 8183 transitions. [2021-08-21 18:56:03,846 INFO L78 Accepts]: Start accepts. Automaton has 3826 states and 8183 transitions. Word has length 29 [2021-08-21 18:56:03,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:03,846 INFO L470 AbstractCegarLoop]: Abstraction has 3826 states and 8183 transitions. [2021-08-21 18:56:03,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:56:03,846 INFO L276 IsEmpty]: Start isEmpty. Operand 3826 states and 8183 transitions. [2021-08-21 18:56:03,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:56:03,850 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:03,850 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:56:03,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Forceful destruction successful, exit code 0 [2021-08-21 18:56:04,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:04,061 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:56:04,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:04,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1673502977, now seen corresponding path program 86 times [2021-08-21 18:56:04,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:04,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925584941] [2021-08-21 18:56:04,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:04,061 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:04,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:04,139 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:56:04,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:04,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925584941] [2021-08-21 18:56:04,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925584941] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:04,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96986789] [2021-08-21 18:56:04,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:56:04,140 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:04,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:04,140 INFO L229 MonitoredProcess]: Starting monitored process 174 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:56:04,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2021-08-21 18:56:07,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:56:07,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:07,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:56:07,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:07,377 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:56:07,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96986789] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:07,377 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:07,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:56:07,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223554441] [2021-08-21 18:56:07,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:56:07,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:07,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:56:07,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:56:07,378 INFO L87 Difference]: Start difference. First operand 3826 states and 8183 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:56:07,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:07,459 INFO L93 Difference]: Finished difference Result 4230 states and 8879 transitions. [2021-08-21 18:56:07,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:56:07,460 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:56:07,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:07,464 INFO L225 Difference]: With dead ends: 4230 [2021-08-21 18:56:07,464 INFO L226 Difference]: Without dead ends: 4221 [2021-08-21 18:56:07,464 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.3ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:56:07,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4221 states. [2021-08-21 18:56:07,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4221 to 3878. [2021-08-21 18:56:07,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.1446995099303585) internal successors, (8315), 3877 states have internal predecessors, (8315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:07,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 8315 transitions. [2021-08-21 18:56:07,499 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 8315 transitions. Word has length 29 [2021-08-21 18:56:07,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:07,499 INFO L470 AbstractCegarLoop]: Abstraction has 3878 states and 8315 transitions. [2021-08-21 18:56:07,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:56:07,500 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 8315 transitions. [2021-08-21 18:56:07,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:56:07,504 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:07,504 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:56:07,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Forceful destruction successful, exit code 0 [2021-08-21 18:56:07,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:07,717 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:56:07,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:07,717 INFO L82 PathProgramCache]: Analyzing trace with hash 98036797, now seen corresponding path program 87 times [2021-08-21 18:56:07,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:07,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854984384] [2021-08-21 18:56:07,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:07,717 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:07,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:07,796 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:56:07,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:07,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854984384] [2021-08-21 18:56:07,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854984384] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:07,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437386133] [2021-08-21 18:56:07,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:56:07,796 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:07,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:07,797 INFO L229 MonitoredProcess]: Starting monitored process 175 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:56:07,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2021-08-21 18:56:10,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:56:10,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:10,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:56:10,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:11,102 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:56:11,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437386133] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:11,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:11,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:56:11,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667810414] [2021-08-21 18:56:11,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:56:11,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:11,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:56:11,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:56:11,104 INFO L87 Difference]: Start difference. First operand 3878 states and 8315 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:56:11,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:11,181 INFO L93 Difference]: Finished difference Result 4209 states and 8836 transitions. [2021-08-21 18:56:11,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:56:11,181 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:56:11,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:11,186 INFO L225 Difference]: With dead ends: 4209 [2021-08-21 18:56:11,186 INFO L226 Difference]: Without dead ends: 4204 [2021-08-21 18:56:11,186 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.4ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:56:11,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4204 states. [2021-08-21 18:56:11,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4204 to 3889. [2021-08-21 18:56:11,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3889 states, 3888 states have (on average 2.144547325102881) internal successors, (8338), 3888 states have internal predecessors, (8338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:11,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3889 states to 3889 states and 8338 transitions. [2021-08-21 18:56:11,220 INFO L78 Accepts]: Start accepts. Automaton has 3889 states and 8338 transitions. Word has length 29 [2021-08-21 18:56:11,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:11,220 INFO L470 AbstractCegarLoop]: Abstraction has 3889 states and 8338 transitions. [2021-08-21 18:56:11,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:56:11,220 INFO L276 IsEmpty]: Start isEmpty. Operand 3889 states and 8338 transitions. [2021-08-21 18:56:11,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:56:11,224 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:11,224 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:11,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Forceful destruction successful, exit code 0 [2021-08-21 18:56:11,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-08-21 18:56:11,445 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:56:11,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:11,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1115492793, now seen corresponding path program 23 times [2021-08-21 18:56:11,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:11,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253909488] [2021-08-21 18:56:11,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:11,445 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:11,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:11,566 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:56:11,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:11,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253909488] [2021-08-21 18:56:11,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253909488] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:11,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534702221] [2021-08-21 18:56:11,567 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:56:11,567 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:11,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:11,567 INFO L229 MonitoredProcess]: Starting monitored process 176 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:56:11,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2021-08-21 18:56:14,799 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:56:14,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:14,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:56:14,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:14,935 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:56:14,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534702221] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:14,935 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:14,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:56:14,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817530773] [2021-08-21 18:56:14,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:56:14,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:14,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:56:14,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:56:14,936 INFO L87 Difference]: Start difference. First operand 3889 states and 8338 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:56:15,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:15,020 INFO L93 Difference]: Finished difference Result 4230 states and 8893 transitions. [2021-08-21 18:56:15,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:56:15,020 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:56:15,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:15,025 INFO L225 Difference]: With dead ends: 4230 [2021-08-21 18:56:15,025 INFO L226 Difference]: Without dead ends: 4225 [2021-08-21 18:56:15,025 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 76.5ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:56:15,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4225 states. [2021-08-21 18:56:15,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4225 to 3916. [2021-08-21 18:56:15,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3916 states, 3915 states have (on average 2.1486590038314177) internal successors, (8412), 3915 states have internal predecessors, (8412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:15,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3916 states to 3916 states and 8412 transitions. [2021-08-21 18:56:15,059 INFO L78 Accepts]: Start accepts. Automaton has 3916 states and 8412 transitions. Word has length 29 [2021-08-21 18:56:15,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:15,059 INFO L470 AbstractCegarLoop]: Abstraction has 3916 states and 8412 transitions. [2021-08-21 18:56:15,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:56:15,059 INFO L276 IsEmpty]: Start isEmpty. Operand 3916 states and 8412 transitions. [2021-08-21 18:56:15,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:56:15,063 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:15,063 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:56:15,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Forceful destruction successful, exit code 0 [2021-08-21 18:56:15,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-08-21 18:56:15,285 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:56:15,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:15,285 INFO L82 PathProgramCache]: Analyzing trace with hash -732411139, now seen corresponding path program 88 times [2021-08-21 18:56:15,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:15,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553910177] [2021-08-21 18:56:15,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:15,285 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:15,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:15,363 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:56:15,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:15,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553910177] [2021-08-21 18:56:15,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553910177] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:15,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340467761] [2021-08-21 18:56:15,364 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:56:15,364 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:15,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:15,365 INFO L229 MonitoredProcess]: Starting monitored process 177 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:56:15,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2021-08-21 18:56:18,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:56:18,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:18,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:56:18,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:18,797 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:56:18,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340467761] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:18,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:18,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:56:18,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942953505] [2021-08-21 18:56:18,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:56:18,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:18,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:56:18,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:56:18,799 INFO L87 Difference]: Start difference. First operand 3916 states and 8412 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:56:18,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:18,875 INFO L93 Difference]: Finished difference Result 4261 states and 8967 transitions. [2021-08-21 18:56:18,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:56:18,875 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:56:18,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:18,879 INFO L225 Difference]: With dead ends: 4261 [2021-08-21 18:56:18,879 INFO L226 Difference]: Without dead ends: 4252 [2021-08-21 18:56:18,880 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.4ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:56:18,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4252 states. [2021-08-21 18:56:18,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4252 to 3930. [2021-08-21 18:56:18,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3930 states, 3929 states have (on average 2.14889284805294) internal successors, (8443), 3929 states have internal predecessors, (8443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:18,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3930 states to 3930 states and 8443 transitions. [2021-08-21 18:56:18,915 INFO L78 Accepts]: Start accepts. Automaton has 3930 states and 8443 transitions. Word has length 29 [2021-08-21 18:56:18,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:18,916 INFO L470 AbstractCegarLoop]: Abstraction has 3930 states and 8443 transitions. [2021-08-21 18:56:18,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:56:18,916 INFO L276 IsEmpty]: Start isEmpty. Operand 3930 states and 8443 transitions. [2021-08-21 18:56:18,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:56:18,920 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:18,920 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:56:18,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Forceful destruction successful, exit code 0 [2021-08-21 18:56:19,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:19,133 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:56:19,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:19,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1861125057, now seen corresponding path program 89 times [2021-08-21 18:56:19,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:19,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553742085] [2021-08-21 18:56:19,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:19,133 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:19,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:19,213 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:56:19,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:19,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553742085] [2021-08-21 18:56:19,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553742085] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:19,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129955453] [2021-08-21 18:56:19,214 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:56:19,214 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:19,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:19,214 INFO L229 MonitoredProcess]: Starting monitored process 178 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:56:19,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2021-08-21 18:56:22,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:56:22,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:22,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:56:22,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:22,511 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:56:22,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129955453] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:22,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:22,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:56:22,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86152122] [2021-08-21 18:56:22,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:56:22,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:22,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:56:22,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:56:22,512 INFO L87 Difference]: Start difference. First operand 3930 states and 8443 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:56:22,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:22,598 INFO L93 Difference]: Finished difference Result 4223 states and 8934 transitions. [2021-08-21 18:56:22,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:56:22,599 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:56:22,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:22,603 INFO L225 Difference]: With dead ends: 4223 [2021-08-21 18:56:22,603 INFO L226 Difference]: Without dead ends: 4218 [2021-08-21 18:56:22,604 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.2ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:56:22,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4218 states. [2021-08-21 18:56:22,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4218 to 3960. [2021-08-21 18:56:22,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3960 states, 3959 states have (on average 2.149280121242738) internal successors, (8509), 3959 states have internal predecessors, (8509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:22,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3960 states to 3960 states and 8509 transitions. [2021-08-21 18:56:22,645 INFO L78 Accepts]: Start accepts. Automaton has 3960 states and 8509 transitions. Word has length 29 [2021-08-21 18:56:22,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:22,645 INFO L470 AbstractCegarLoop]: Abstraction has 3960 states and 8509 transitions. [2021-08-21 18:56:22,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:56:22,645 INFO L276 IsEmpty]: Start isEmpty. Operand 3960 states and 8509 transitions. [2021-08-21 18:56:22,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:56:22,650 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:22,650 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:56:22,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Forceful destruction successful, exit code 0 [2021-08-21 18:56:22,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:22,877 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:56:22,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:22,877 INFO L82 PathProgramCache]: Analyzing trace with hash -504286019, now seen corresponding path program 90 times [2021-08-21 18:56:22,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:22,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043554533] [2021-08-21 18:56:22,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:22,877 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:22,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:22,966 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:56:22,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:22,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043554533] [2021-08-21 18:56:22,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043554533] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:22,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699884504] [2021-08-21 18:56:22,967 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:56:22,967 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:22,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:22,967 INFO L229 MonitoredProcess]: Starting monitored process 179 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:56:22,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2021-08-21 18:56:26,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:56:26,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:26,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:56:26,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:26,420 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:56:26,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699884504] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:26,420 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:26,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:56:26,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557450737] [2021-08-21 18:56:26,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:56:26,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:26,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:56:26,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:56:26,421 INFO L87 Difference]: Start difference. First operand 3960 states and 8509 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:56:26,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:26,502 INFO L93 Difference]: Finished difference Result 4214 states and 8918 transitions. [2021-08-21 18:56:26,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:56:26,503 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:56:26,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:26,507 INFO L225 Difference]: With dead ends: 4214 [2021-08-21 18:56:26,507 INFO L226 Difference]: Without dead ends: 4209 [2021-08-21 18:56:26,507 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.6ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:56:26,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4209 states. [2021-08-21 18:56:26,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4209 to 3975. [2021-08-21 18:56:26,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3975 states, 3974 states have (on average 2.1499748364368396) internal successors, (8544), 3974 states have internal predecessors, (8544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:26,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3975 states to 3975 states and 8544 transitions. [2021-08-21 18:56:26,542 INFO L78 Accepts]: Start accepts. Automaton has 3975 states and 8544 transitions. Word has length 29 [2021-08-21 18:56:26,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:26,543 INFO L470 AbstractCegarLoop]: Abstraction has 3975 states and 8544 transitions. [2021-08-21 18:56:26,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:56:26,543 INFO L276 IsEmpty]: Start isEmpty. Operand 3975 states and 8544 transitions. [2021-08-21 18:56:26,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:56:26,547 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:26,547 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:56:26,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Forceful destruction successful, exit code 0 [2021-08-21 18:56:26,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:26,773 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:56:26,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:26,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1213638475, now seen corresponding path program 91 times [2021-08-21 18:56:26,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:26,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53776150] [2021-08-21 18:56:26,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:26,773 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:26,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:26,852 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:56:26,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:26,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53776150] [2021-08-21 18:56:26,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53776150] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:26,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428778498] [2021-08-21 18:56:26,853 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:56:26,853 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:26,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:26,854 INFO L229 MonitoredProcess]: Starting monitored process 180 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:56:26,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2021-08-21 18:56:30,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:30,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:56:30,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:30,374 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:56:30,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428778498] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:30,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:30,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:56:30,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271241146] [2021-08-21 18:56:30,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:56:30,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:30,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:56:30,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:56:30,375 INFO L87 Difference]: Start difference. First operand 3975 states and 8544 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:56:30,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:30,455 INFO L93 Difference]: Finished difference Result 4307 states and 9070 transitions. [2021-08-21 18:56:30,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:56:30,455 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:56:30,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:30,461 INFO L225 Difference]: With dead ends: 4307 [2021-08-21 18:56:30,461 INFO L226 Difference]: Without dead ends: 4302 [2021-08-21 18:56:30,461 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.6ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:56:30,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4302 states. [2021-08-21 18:56:30,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4302 to 3991. [2021-08-21 18:56:30,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3991 states, 3990 states have (on average 2.151127819548872) internal successors, (8583), 3990 states have internal predecessors, (8583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:30,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3991 states to 3991 states and 8583 transitions. [2021-08-21 18:56:30,512 INFO L78 Accepts]: Start accepts. Automaton has 3991 states and 8583 transitions. Word has length 29 [2021-08-21 18:56:30,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:30,512 INFO L470 AbstractCegarLoop]: Abstraction has 3991 states and 8583 transitions. [2021-08-21 18:56:30,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:56:30,512 INFO L276 IsEmpty]: Start isEmpty. Operand 3991 states and 8583 transitions. [2021-08-21 18:56:30,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:56:30,516 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:30,516 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:56:30,542 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Ended with exit code 0 [2021-08-21 18:56:30,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-08-21 18:56:30,733 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:56:30,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:30,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1233424889, now seen corresponding path program 92 times [2021-08-21 18:56:30,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:30,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309579437] [2021-08-21 18:56:30,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:30,733 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:30,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:30,821 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:56:30,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:30,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309579437] [2021-08-21 18:56:30,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309579437] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:30,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394650951] [2021-08-21 18:56:30,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:56:30,822 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:30,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:30,822 INFO L229 MonitoredProcess]: Starting monitored process 181 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:56:30,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2021-08-21 18:56:34,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:56:34,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:34,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:56:34,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:34,217 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:56:34,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394650951] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:34,217 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:34,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:56:34,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817165929] [2021-08-21 18:56:34,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:56:34,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:34,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:56:34,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:56:34,218 INFO L87 Difference]: Start difference. First operand 3991 states and 8583 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:56:34,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:34,313 INFO L93 Difference]: Finished difference Result 4340 states and 9149 transitions. [2021-08-21 18:56:34,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:56:34,313 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:56:34,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:34,321 INFO L225 Difference]: With dead ends: 4340 [2021-08-21 18:56:34,321 INFO L226 Difference]: Without dead ends: 4331 [2021-08-21 18:56:34,321 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.5ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:56:34,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4331 states. [2021-08-21 18:56:34,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4331 to 4005. [2021-08-21 18:56:34,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4005 states, 4004 states have (on average 2.1503496503496504) internal successors, (8610), 4004 states have internal predecessors, (8610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:34,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4005 states to 4005 states and 8610 transitions. [2021-08-21 18:56:34,377 INFO L78 Accepts]: Start accepts. Automaton has 4005 states and 8610 transitions. Word has length 29 [2021-08-21 18:56:34,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:34,377 INFO L470 AbstractCegarLoop]: Abstraction has 4005 states and 8610 transitions. [2021-08-21 18:56:34,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:56:34,377 INFO L276 IsEmpty]: Start isEmpty. Operand 4005 states and 8610 transitions. [2021-08-21 18:56:34,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:56:34,381 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:34,381 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:56:34,408 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Ended with exit code 0 [2021-08-21 18:56:34,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:34,605 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:56:34,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:34,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1493927873, now seen corresponding path program 93 times [2021-08-21 18:56:34,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:34,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471749678] [2021-08-21 18:56:34,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:34,605 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:34,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:34,684 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:56:34,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:34,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471749678] [2021-08-21 18:56:34,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471749678] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:34,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521455795] [2021-08-21 18:56:34,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:56:34,684 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:34,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:34,685 INFO L229 MonitoredProcess]: Starting monitored process 182 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:56:34,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2021-08-21 18:56:37,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:56:37,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:37,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:56:37,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:38,022 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:56:38,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521455795] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:38,022 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:38,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:56:38,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529716753] [2021-08-21 18:56:38,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:56:38,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:38,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:56:38,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:56:38,023 INFO L87 Difference]: Start difference. First operand 4005 states and 8610 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:56:38,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:38,109 INFO L93 Difference]: Finished difference Result 4317 states and 9118 transitions. [2021-08-21 18:56:38,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:56:38,109 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:56:38,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:38,114 INFO L225 Difference]: With dead ends: 4317 [2021-08-21 18:56:38,114 INFO L226 Difference]: Without dead ends: 4312 [2021-08-21 18:56:38,114 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.3ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:56:38,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4312 states. [2021-08-21 18:56:38,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4312 to 4032. [2021-08-21 18:56:38,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4032 states, 4031 states have (on average 2.152319523691392) internal successors, (8676), 4031 states have internal predecessors, (8676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:38,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4032 states to 4032 states and 8676 transitions. [2021-08-21 18:56:38,153 INFO L78 Accepts]: Start accepts. Automaton has 4032 states and 8676 transitions. Word has length 29 [2021-08-21 18:56:38,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:38,153 INFO L470 AbstractCegarLoop]: Abstraction has 4032 states and 8676 transitions. [2021-08-21 18:56:38,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:56:38,153 INFO L276 IsEmpty]: Start isEmpty. Operand 4032 states and 8676 transitions. [2021-08-21 18:56:38,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:56:38,157 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:38,157 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:56:38,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Forceful destruction successful, exit code 0 [2021-08-21 18:56:38,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable196 [2021-08-21 18:56:38,381 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:56:38,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:38,381 INFO L82 PathProgramCache]: Analyzing trace with hash -353976059, now seen corresponding path program 94 times [2021-08-21 18:56:38,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:38,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307234166] [2021-08-21 18:56:38,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:38,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:38,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:38,461 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:56:38,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:38,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307234166] [2021-08-21 18:56:38,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307234166] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:38,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624751489] [2021-08-21 18:56:38,461 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:56:38,461 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:38,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:38,462 INFO L229 MonitoredProcess]: Starting monitored process 183 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:56:38,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2021-08-21 18:56:41,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:56:41,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:41,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:56:41,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:42,071 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:56:42,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624751489] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:42,071 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:42,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:56:42,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005319570] [2021-08-21 18:56:42,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:56:42,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:42,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:56:42,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:56:42,072 INFO L87 Difference]: Start difference. First operand 4032 states and 8676 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:56:42,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:42,153 INFO L93 Difference]: Finished difference Result 4351 states and 9190 transitions. [2021-08-21 18:56:42,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:56:42,154 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:56:42,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:42,158 INFO L225 Difference]: With dead ends: 4351 [2021-08-21 18:56:42,158 INFO L226 Difference]: Without dead ends: 4342 [2021-08-21 18:56:42,158 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.6ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:56:42,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4342 states. [2021-08-21 18:56:42,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4342 to 4046. [2021-08-21 18:56:42,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4046 states, 4045 states have (on average 2.1515451174289244) internal successors, (8703), 4045 states have internal predecessors, (8703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:42,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4046 states to 4046 states and 8703 transitions. [2021-08-21 18:56:42,193 INFO L78 Accepts]: Start accepts. Automaton has 4046 states and 8703 transitions. Word has length 29 [2021-08-21 18:56:42,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:42,194 INFO L470 AbstractCegarLoop]: Abstraction has 4046 states and 8703 transitions. [2021-08-21 18:56:42,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:56:42,194 INFO L276 IsEmpty]: Start isEmpty. Operand 4046 states and 8703 transitions. [2021-08-21 18:56:42,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:56:42,198 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:42,198 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:56:42,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Forceful destruction successful, exit code 0 [2021-08-21 18:56:42,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:42,411 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:56:42,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:42,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1494712133, now seen corresponding path program 95 times [2021-08-21 18:56:42,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:42,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852837405] [2021-08-21 18:56:42,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:42,411 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:42,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:42,492 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:56:42,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:42,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852837405] [2021-08-21 18:56:42,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852837405] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:42,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94335751] [2021-08-21 18:56:42,493 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:56:42,493 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:42,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:42,494 INFO L229 MonitoredProcess]: Starting monitored process 184 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:56:42,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2021-08-21 18:56:45,918 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:56:45,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:45,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:56:45,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:46,054 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:56:46,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94335751] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:46,054 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:46,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:56:46,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326466577] [2021-08-21 18:56:46,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:56:46,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:46,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:56:46,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:56:46,055 INFO L87 Difference]: Start difference. First operand 4046 states and 8703 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:56:46,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:46,144 INFO L93 Difference]: Finished difference Result 4318 states and 9153 transitions. [2021-08-21 18:56:46,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:56:46,145 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:56:46,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:46,149 INFO L225 Difference]: With dead ends: 4318 [2021-08-21 18:56:46,149 INFO L226 Difference]: Without dead ends: 4313 [2021-08-21 18:56:46,150 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.3ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:56:46,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4313 states. [2021-08-21 18:56:46,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4313 to 4072. [2021-08-21 18:56:46,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4072 states, 4071 states have (on average 2.1535249324490295) internal successors, (8767), 4071 states have internal predecessors, (8767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:46,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4072 states to 4072 states and 8767 transitions. [2021-08-21 18:56:46,186 INFO L78 Accepts]: Start accepts. Automaton has 4072 states and 8767 transitions. Word has length 29 [2021-08-21 18:56:46,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:46,186 INFO L470 AbstractCegarLoop]: Abstraction has 4072 states and 8767 transitions. [2021-08-21 18:56:46,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:56:46,186 INFO L276 IsEmpty]: Start isEmpty. Operand 4072 states and 8767 transitions. [2021-08-21 18:56:46,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:56:46,190 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:46,190 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:56:46,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Forceful destruction successful, exit code 0 [2021-08-21 18:56:46,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:46,411 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:56:46,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:46,412 INFO L82 PathProgramCache]: Analyzing trace with hash -2055407159, now seen corresponding path program 96 times [2021-08-21 18:56:46,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:46,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405256271] [2021-08-21 18:56:46,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:46,412 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:46,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:46,491 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:56:46,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:46,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405256271] [2021-08-21 18:56:46,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405256271] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:46,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389601807] [2021-08-21 18:56:46,492 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:56:46,492 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:46,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:46,492 INFO L229 MonitoredProcess]: Starting monitored process 185 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:56:46,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2021-08-21 18:56:49,921 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:56:49,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:49,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:56:49,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:50,058 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:56:50,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389601807] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:50,058 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:50,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:56:50,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858795684] [2021-08-21 18:56:50,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:56:50,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:50,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:56:50,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:56:50,059 INFO L87 Difference]: Start difference. First operand 4072 states and 8767 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:56:50,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:50,154 INFO L93 Difference]: Finished difference Result 4341 states and 9202 transitions. [2021-08-21 18:56:50,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:56:50,155 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:56:50,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:50,162 INFO L225 Difference]: With dead ends: 4341 [2021-08-21 18:56:50,162 INFO L226 Difference]: Without dead ends: 4336 [2021-08-21 18:56:50,162 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.5ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:56:50,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4336 states. [2021-08-21 18:56:50,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4336 to 4087. [2021-08-21 18:56:50,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4087 states, 4086 states have (on average 2.1532060695056288) internal successors, (8798), 4086 states have internal predecessors, (8798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:50,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4087 states to 4087 states and 8798 transitions. [2021-08-21 18:56:50,214 INFO L78 Accepts]: Start accepts. Automaton has 4087 states and 8798 transitions. Word has length 29 [2021-08-21 18:56:50,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:50,214 INFO L470 AbstractCegarLoop]: Abstraction has 4087 states and 8798 transitions. [2021-08-21 18:56:50,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:56:50,214 INFO L276 IsEmpty]: Start isEmpty. Operand 4087 states and 8798 transitions. [2021-08-21 18:56:50,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:56:50,220 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:50,220 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:56:50,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Forceful destruction successful, exit code 0 [2021-08-21 18:56:50,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-08-21 18:56:50,424 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:56:50,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:50,424 INFO L82 PathProgramCache]: Analyzing trace with hash 957700797, now seen corresponding path program 97 times [2021-08-21 18:56:50,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:50,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027916191] [2021-08-21 18:56:50,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:50,425 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:50,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:50,537 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:56:50,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:50,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027916191] [2021-08-21 18:56:50,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027916191] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:50,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929119862] [2021-08-21 18:56:50,538 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:56:50,538 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:50,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:50,539 INFO L229 MonitoredProcess]: Starting monitored process 186 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:56:50,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2021-08-21 18:56:53,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:53,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:56:53,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:54,029 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:56:54,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929119862] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:54,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:54,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:56:54,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113862522] [2021-08-21 18:56:54,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:56:54,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:54,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:56:54,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:56:54,030 INFO L87 Difference]: Start difference. First operand 4087 states and 8798 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:56:54,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:54,110 INFO L93 Difference]: Finished difference Result 4370 states and 9261 transitions. [2021-08-21 18:56:54,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:56:54,110 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:56:54,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:54,115 INFO L225 Difference]: With dead ends: 4370 [2021-08-21 18:56:54,115 INFO L226 Difference]: Without dead ends: 4365 [2021-08-21 18:56:54,115 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.2ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:56:54,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4365 states. [2021-08-21 18:56:54,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4365 to 4110. [2021-08-21 18:56:54,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4110 states, 4109 states have (on average 2.1562423947432467) internal successors, (8860), 4109 states have internal predecessors, (8860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:54,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4110 states to 4110 states and 8860 transitions. [2021-08-21 18:56:54,153 INFO L78 Accepts]: Start accepts. Automaton has 4110 states and 8860 transitions. Word has length 29 [2021-08-21 18:56:54,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:54,153 INFO L470 AbstractCegarLoop]: Abstraction has 4110 states and 8860 transitions. [2021-08-21 18:56:54,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:56:54,154 INFO L276 IsEmpty]: Start isEmpty. Operand 4110 states and 8860 transitions. [2021-08-21 18:56:54,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:56:54,158 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:54,158 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:56:54,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Forceful destruction successful, exit code 0 [2021-08-21 18:56:54,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-08-21 18:56:54,377 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:56:54,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:54,377 INFO L82 PathProgramCache]: Analyzing trace with hash -890203135, now seen corresponding path program 98 times [2021-08-21 18:56:54,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:54,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742897443] [2021-08-21 18:56:54,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:54,377 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:54,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:54,459 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:56:54,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:54,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742897443] [2021-08-21 18:56:54,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742897443] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:54,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463625200] [2021-08-21 18:56:54,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:56:54,459 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:54,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:54,460 INFO L229 MonitoredProcess]: Starting monitored process 187 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:56:54,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2021-08-21 18:56:57,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:56:57,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:57,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:56:57,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:58,052 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:56:58,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463625200] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:58,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:58,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:56:58,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102273861] [2021-08-21 18:56:58,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:56:58,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:58,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:56:58,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:56:58,053 INFO L87 Difference]: Start difference. First operand 4110 states and 8860 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:56:58,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:58,130 INFO L93 Difference]: Finished difference Result 4399 states and 9324 transitions. [2021-08-21 18:56:58,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:56:58,130 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:56:58,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:58,135 INFO L225 Difference]: With dead ends: 4399 [2021-08-21 18:56:58,135 INFO L226 Difference]: Without dead ends: 4390 [2021-08-21 18:56:58,135 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.9ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:56:58,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4390 states. [2021-08-21 18:56:58,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4390 to 4122. [2021-08-21 18:56:58,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4122 states, 4121 states have (on average 2.156030089784033) internal successors, (8885), 4121 states have internal predecessors, (8885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:58,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4122 states to 4122 states and 8885 transitions. [2021-08-21 18:56:58,170 INFO L78 Accepts]: Start accepts. Automaton has 4122 states and 8885 transitions. Word has length 29 [2021-08-21 18:56:58,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:58,171 INFO L470 AbstractCegarLoop]: Abstraction has 4122 states and 8885 transitions. [2021-08-21 18:56:58,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:56:58,171 INFO L276 IsEmpty]: Start isEmpty. Operand 4122 states and 8885 transitions. [2021-08-21 18:56:58,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:56:58,175 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:58,175 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:56:58,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Forceful destruction successful, exit code 0 [2021-08-21 18:56:58,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:58,396 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:56:58,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:58,396 INFO L82 PathProgramCache]: Analyzing trace with hash 958485057, now seen corresponding path program 99 times [2021-08-21 18:56:58,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:58,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721216856] [2021-08-21 18:56:58,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:58,396 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:58,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:58,486 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:56:58,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:58,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721216856] [2021-08-21 18:56:58,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721216856] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:58,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054772950] [2021-08-21 18:56:58,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:56:58,487 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:58,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:58,487 INFO L229 MonitoredProcess]: Starting monitored process 188 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:56:58,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2021-08-21 18:57:02,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:57:02,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:02,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:57:02,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:02,233 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:57:02,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054772950] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:02,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:02,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:57:02,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498115808] [2021-08-21 18:57:02,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:57:02,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:02,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:57:02,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:57:02,234 INFO L87 Difference]: Start difference. First operand 4122 states and 8885 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:57:02,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:02,319 INFO L93 Difference]: Finished difference Result 4361 states and 9265 transitions. [2021-08-21 18:57:02,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:57:02,319 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:57:02,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:02,323 INFO L225 Difference]: With dead ends: 4361 [2021-08-21 18:57:02,323 INFO L226 Difference]: Without dead ends: 4356 [2021-08-21 18:57:02,324 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.8ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:57:02,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4356 states. [2021-08-21 18:57:02,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4356 to 4135. [2021-08-21 18:57:02,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4135 states, 4134 states have (on average 2.157232704402516) internal successors, (8918), 4134 states have internal predecessors, (8918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:02,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4135 states to 4135 states and 8918 transitions. [2021-08-21 18:57:02,361 INFO L78 Accepts]: Start accepts. Automaton has 4135 states and 8918 transitions. Word has length 29 [2021-08-21 18:57:02,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:02,361 INFO L470 AbstractCegarLoop]: Abstraction has 4135 states and 8918 transitions. [2021-08-21 18:57:02,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:57:02,361 INFO L276 IsEmpty]: Start isEmpty. Operand 4135 states and 8918 transitions. [2021-08-21 18:57:02,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:57:02,366 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:02,366 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:57:02,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Forceful destruction successful, exit code 0 [2021-08-21 18:57:02,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-08-21 18:57:02,591 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:57:02,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:02,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1703333061, now seen corresponding path program 100 times [2021-08-21 18:57:02,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:02,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176147960] [2021-08-21 18:57:02,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:02,592 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:02,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:02,705 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:57:02,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:02,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176147960] [2021-08-21 18:57:02,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176147960] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:02,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133510846] [2021-08-21 18:57:02,705 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:57:02,705 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:02,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:02,706 INFO L229 MonitoredProcess]: Starting monitored process 189 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:57:02,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2021-08-21 18:57:06,132 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:57:06,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:06,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:57:06,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:06,275 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:57:06,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133510846] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:06,275 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:06,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:57:06,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275099092] [2021-08-21 18:57:06,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:57:06,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:06,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:57:06,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:57:06,276 INFO L87 Difference]: Start difference. First operand 4135 states and 8918 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:57:06,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:06,365 INFO L93 Difference]: Finished difference Result 4378 states and 9307 transitions. [2021-08-21 18:57:06,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:57:06,365 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:57:06,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:06,371 INFO L225 Difference]: With dead ends: 4378 [2021-08-21 18:57:06,372 INFO L226 Difference]: Without dead ends: 4373 [2021-08-21 18:57:06,372 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.1ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:57:06,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4373 states. [2021-08-21 18:57:06,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4373 to 4148. [2021-08-21 18:57:06,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4148 states, 4147 states have (on average 2.1574632264287437) internal successors, (8947), 4147 states have internal predecessors, (8947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:06,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4148 states to 4148 states and 8947 transitions. [2021-08-21 18:57:06,414 INFO L78 Accepts]: Start accepts. Automaton has 4148 states and 8947 transitions. Word has length 29 [2021-08-21 18:57:06,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:06,415 INFO L470 AbstractCegarLoop]: Abstraction has 4148 states and 8947 transitions. [2021-08-21 18:57:06,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:57:06,415 INFO L276 IsEmpty]: Start isEmpty. Operand 4148 states and 8947 transitions. [2021-08-21 18:57:06,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:57:06,419 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:06,419 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:57:06,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Forceful destruction successful, exit code 0 [2021-08-21 18:57:06,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:06,641 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:57:06,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:06,641 INFO L82 PathProgramCache]: Analyzing trace with hash 208525625, now seen corresponding path program 101 times [2021-08-21 18:57:06,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:06,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19865597] [2021-08-21 18:57:06,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:06,641 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:06,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:06,724 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:57:06,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:06,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19865597] [2021-08-21 18:57:06,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19865597] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:06,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975845587] [2021-08-21 18:57:06,725 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:57:06,725 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:06,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:06,726 INFO L229 MonitoredProcess]: Starting monitored process 190 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:57:06,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2021-08-21 18:57:10,322 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:57:10,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:10,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:57:10,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:10,452 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:57:10,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975845587] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:10,453 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:10,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:57:10,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736120854] [2021-08-21 18:57:10,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:57:10,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:10,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:57:10,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:57:10,453 INFO L87 Difference]: Start difference. First operand 4148 states and 8947 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:57:10,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:10,537 INFO L93 Difference]: Finished difference Result 4372 states and 9308 transitions. [2021-08-21 18:57:10,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:57:10,537 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:57:10,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:10,542 INFO L225 Difference]: With dead ends: 4372 [2021-08-21 18:57:10,542 INFO L226 Difference]: Without dead ends: 4367 [2021-08-21 18:57:10,542 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.7ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:57:10,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4367 states. [2021-08-21 18:57:10,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4367 to 4161. [2021-08-21 18:57:10,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4161 states, 4160 states have (on average 2.1576923076923076) internal successors, (8976), 4160 states have internal predecessors, (8976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:10,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4161 states to 4161 states and 8976 transitions. [2021-08-21 18:57:10,579 INFO L78 Accepts]: Start accepts. Automaton has 4161 states and 8976 transitions. Word has length 29 [2021-08-21 18:57:10,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:10,579 INFO L470 AbstractCegarLoop]: Abstraction has 4161 states and 8976 transitions. [2021-08-21 18:57:10,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:57:10,579 INFO L276 IsEmpty]: Start isEmpty. Operand 4161 states and 8976 transitions. [2021-08-21 18:57:10,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:57:10,583 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:10,584 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:57:10,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Forceful destruction successful, exit code 0 [2021-08-21 18:57:10,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2021-08-21 18:57:10,797 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:57:10,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:10,797 INFO L82 PathProgramCache]: Analyzing trace with hash 703953589, now seen corresponding path program 102 times [2021-08-21 18:57:10,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:10,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951456845] [2021-08-21 18:57:10,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:10,797 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:10,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:10,885 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:57:10,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:10,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951456845] [2021-08-21 18:57:10,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951456845] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:10,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107855540] [2021-08-21 18:57:10,886 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:57:10,886 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:10,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:10,886 INFO L229 MonitoredProcess]: Starting monitored process 191 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:57:10,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2021-08-21 18:57:14,484 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:57:14,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:14,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:57:14,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:14,636 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:57:14,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107855540] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:14,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:14,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:57:14,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965549451] [2021-08-21 18:57:14,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:57:14,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:14,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:57:14,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:57:14,637 INFO L87 Difference]: Start difference. First operand 4161 states and 8976 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:57:14,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:14,722 INFO L93 Difference]: Finished difference Result 4507 states and 9524 transitions. [2021-08-21 18:57:14,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:57:14,723 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:57:14,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:14,727 INFO L225 Difference]: With dead ends: 4507 [2021-08-21 18:57:14,727 INFO L226 Difference]: Without dead ends: 4502 [2021-08-21 18:57:14,728 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.0ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:57:14,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4502 states. [2021-08-21 18:57:14,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4502 to 4177. [2021-08-21 18:57:14,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4177 states, 4176 states have (on average 2.159243295019157) internal successors, (9017), 4176 states have internal predecessors, (9017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:14,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4177 states to 4177 states and 9017 transitions. [2021-08-21 18:57:14,792 INFO L78 Accepts]: Start accepts. Automaton has 4177 states and 9017 transitions. Word has length 29 [2021-08-21 18:57:14,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:14,792 INFO L470 AbstractCegarLoop]: Abstraction has 4177 states and 9017 transitions. [2021-08-21 18:57:14,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:57:14,792 INFO L276 IsEmpty]: Start isEmpty. Operand 4177 states and 9017 transitions. [2021-08-21 18:57:14,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:57:14,796 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:14,796 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:57:14,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Forceful destruction successful, exit code 0 [2021-08-21 18:57:15,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:15,023 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:57:15,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:15,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1143950343, now seen corresponding path program 103 times [2021-08-21 18:57:15,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:15,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393321874] [2021-08-21 18:57:15,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:15,024 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:15,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:15,102 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:57:15,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:15,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393321874] [2021-08-21 18:57:15,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393321874] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:15,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726437046] [2021-08-21 18:57:15,102 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:57:15,102 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:15,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:15,103 INFO L229 MonitoredProcess]: Starting monitored process 192 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:57:15,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2021-08-21 18:57:18,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:18,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:57:18,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:18,832 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:57:18,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726437046] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:18,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:18,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:57:18,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50004276] [2021-08-21 18:57:18,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:57:18,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:18,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:57:18,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:57:18,833 INFO L87 Difference]: Start difference. First operand 4177 states and 9017 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:57:18,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:18,912 INFO L93 Difference]: Finished difference Result 4541 states and 9601 transitions. [2021-08-21 18:57:18,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:57:18,912 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:57:18,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:18,917 INFO L225 Difference]: With dead ends: 4541 [2021-08-21 18:57:18,917 INFO L226 Difference]: Without dead ends: 4532 [2021-08-21 18:57:18,917 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.5ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:57:18,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4532 states. [2021-08-21 18:57:18,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4532 to 4191. [2021-08-21 18:57:18,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4191 states, 4190 states have (on average 2.1589498806682577) internal successors, (9046), 4190 states have internal predecessors, (9046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:18,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4191 states to 4191 states and 9046 transitions. [2021-08-21 18:57:18,954 INFO L78 Accepts]: Start accepts. Automaton has 4191 states and 9046 transitions. Word has length 29 [2021-08-21 18:57:18,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:18,954 INFO L470 AbstractCegarLoop]: Abstraction has 4191 states and 9046 transitions. [2021-08-21 18:57:18,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:57:18,954 INFO L276 IsEmpty]: Start isEmpty. Operand 4191 states and 9046 transitions. [2021-08-21 18:57:18,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:57:18,958 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:18,959 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:57:18,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Forceful destruction successful, exit code 0 [2021-08-21 18:57:19,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:19,184 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:57:19,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:19,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1449585853, now seen corresponding path program 104 times [2021-08-21 18:57:19,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:19,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649645354] [2021-08-21 18:57:19,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:19,184 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:19,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:19,263 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:57:19,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:19,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649645354] [2021-08-21 18:57:19,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649645354] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:19,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64915515] [2021-08-21 18:57:19,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:57:19,264 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:19,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:19,264 INFO L229 MonitoredProcess]: Starting monitored process 193 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:57:19,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2021-08-21 18:57:22,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:57:22,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:22,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:57:22,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:22,965 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:57:22,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64915515] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:22,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:22,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:57:22,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840577067] [2021-08-21 18:57:22,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:57:22,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:22,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:57:22,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:57:22,966 INFO L87 Difference]: Start difference. First operand 4191 states and 9046 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:57:23,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:23,053 INFO L93 Difference]: Finished difference Result 4491 states and 9535 transitions. [2021-08-21 18:57:23,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:57:23,053 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:57:23,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:23,058 INFO L225 Difference]: With dead ends: 4491 [2021-08-21 18:57:23,059 INFO L226 Difference]: Without dead ends: 4486 [2021-08-21 18:57:23,059 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.6ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:57:23,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4486 states. [2021-08-21 18:57:23,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4486 to 4210. [2021-08-21 18:57:23,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4210 states, 4209 states have (on average 2.1579947731052505) internal successors, (9083), 4209 states have internal predecessors, (9083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:23,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4210 states to 4210 states and 9083 transitions. [2021-08-21 18:57:23,104 INFO L78 Accepts]: Start accepts. Automaton has 4210 states and 9083 transitions. Word has length 29 [2021-08-21 18:57:23,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:23,105 INFO L470 AbstractCegarLoop]: Abstraction has 4210 states and 9083 transitions. [2021-08-21 18:57:23,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:57:23,105 INFO L276 IsEmpty]: Start isEmpty. Operand 4210 states and 9083 transitions. [2021-08-21 18:57:23,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:57:23,110 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:23,110 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:57:23,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Forceful destruction successful, exit code 0 [2021-08-21 18:57:23,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:23,336 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:57:23,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:23,336 INFO L82 PathProgramCache]: Analyzing trace with hash -915825223, now seen corresponding path program 105 times [2021-08-21 18:57:23,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:23,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557798171] [2021-08-21 18:57:23,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:23,337 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:23,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:23,465 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:57:23,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:23,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557798171] [2021-08-21 18:57:23,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557798171] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:23,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534495185] [2021-08-21 18:57:23,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:57:23,466 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:23,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:23,467 INFO L229 MonitoredProcess]: Starting monitored process 194 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:57:23,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2021-08-21 18:57:27,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:57:27,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:27,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:57:27,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:27,249 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:57:27,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534495185] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:27,250 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:27,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:57:27,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357320877] [2021-08-21 18:57:27,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:57:27,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:27,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:57:27,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:57:27,250 INFO L87 Difference]: Start difference. First operand 4210 states and 9083 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:57:27,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:27,336 INFO L93 Difference]: Finished difference Result 4475 states and 9509 transitions. [2021-08-21 18:57:27,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:57:27,336 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:57:27,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:27,342 INFO L225 Difference]: With dead ends: 4475 [2021-08-21 18:57:27,342 INFO L226 Difference]: Without dead ends: 4470 [2021-08-21 18:57:27,342 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 76.9ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:57:27,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4470 states. [2021-08-21 18:57:27,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4470 to 4225. [2021-08-21 18:57:27,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4225 states, 4224 states have (on average 2.1581439393939394) internal successors, (9116), 4224 states have internal predecessors, (9116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:27,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4225 states to 4225 states and 9116 transitions. [2021-08-21 18:57:27,386 INFO L78 Accepts]: Start accepts. Automaton has 4225 states and 9116 transitions. Word has length 29 [2021-08-21 18:57:27,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:27,387 INFO L470 AbstractCegarLoop]: Abstraction has 4225 states and 9116 transitions. [2021-08-21 18:57:27,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:57:27,387 INFO L276 IsEmpty]: Start isEmpty. Operand 4225 states and 9116 transitions. [2021-08-21 18:57:27,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:57:27,392 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:27,392 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:57:27,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Ended with exit code 0 [2021-08-21 18:57:27,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2021-08-21 18:57:27,605 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:57:27,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:27,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1343091769, now seen corresponding path program 24 times [2021-08-21 18:57:27,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:27,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859208161] [2021-08-21 18:57:27,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:27,605 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:27,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:27,685 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:57:27,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:27,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859208161] [2021-08-21 18:57:27,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859208161] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:27,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637171696] [2021-08-21 18:57:27,686 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:57:27,686 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:27,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:27,717 INFO L229 MonitoredProcess]: Starting monitored process 195 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:57:27,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2021-08-21 18:57:31,438 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:57:31,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:31,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:57:31,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:31,575 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:57:31,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637171696] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:31,576 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:31,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:57:31,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783749249] [2021-08-21 18:57:31,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:57:31,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:31,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:57:31,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:57:31,576 INFO L87 Difference]: Start difference. First operand 4225 states and 9116 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:57:31,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:31,655 INFO L93 Difference]: Finished difference Result 4545 states and 9561 transitions. [2021-08-21 18:57:31,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:57:31,655 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:57:31,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:31,661 INFO L225 Difference]: With dead ends: 4545 [2021-08-21 18:57:31,661 INFO L226 Difference]: Without dead ends: 4540 [2021-08-21 18:57:31,661 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.4ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:57:31,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4540 states. [2021-08-21 18:57:31,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4540 to 4252. [2021-08-21 18:57:31,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4252 states, 4251 states have (on average 2.1613737944013174) internal successors, (9188), 4251 states have internal predecessors, (9188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:31,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4252 states to 4252 states and 9188 transitions. [2021-08-21 18:57:31,702 INFO L78 Accepts]: Start accepts. Automaton has 4252 states and 9188 transitions. Word has length 29 [2021-08-21 18:57:31,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:31,702 INFO L470 AbstractCegarLoop]: Abstraction has 4252 states and 9188 transitions. [2021-08-21 18:57:31,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:57:31,702 INFO L276 IsEmpty]: Start isEmpty. Operand 4252 states and 9188 transitions. [2021-08-21 18:57:31,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:57:31,708 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:31,708 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:57:31,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Forceful destruction successful, exit code 0 [2021-08-21 18:57:31,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2021-08-21 18:57:31,921 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:57:31,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:31,921 INFO L82 PathProgramCache]: Analyzing trace with hash -504812163, now seen corresponding path program 106 times [2021-08-21 18:57:31,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:31,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328684319] [2021-08-21 18:57:31,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:31,921 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:31,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:32,000 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:57:32,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:32,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328684319] [2021-08-21 18:57:32,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328684319] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:32,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695489261] [2021-08-21 18:57:32,001 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:57:32,001 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:32,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:32,001 INFO L229 MonitoredProcess]: Starting monitored process 196 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:57:32,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2021-08-21 18:57:35,689 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:57:35,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:35,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:57:35,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:35,820 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:57:35,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695489261] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:35,821 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:35,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:57:35,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102515946] [2021-08-21 18:57:35,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:57:35,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:35,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:57:35,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:57:35,821 INFO L87 Difference]: Start difference. First operand 4252 states and 9188 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:57:35,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:35,895 INFO L93 Difference]: Finished difference Result 4569 states and 9663 transitions. [2021-08-21 18:57:35,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:57:35,895 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:57:35,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:35,900 INFO L225 Difference]: With dead ends: 4569 [2021-08-21 18:57:35,900 INFO L226 Difference]: Without dead ends: 4560 [2021-08-21 18:57:35,900 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.1ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:57:35,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4560 states. [2021-08-21 18:57:35,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4560 to 4271. [2021-08-21 18:57:35,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4271 states, 4270 states have (on average 2.1622950819672133) internal successors, (9233), 4270 states have internal predecessors, (9233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:35,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4271 states to 4271 states and 9233 transitions. [2021-08-21 18:57:35,939 INFO L78 Accepts]: Start accepts. Automaton has 4271 states and 9233 transitions. Word has length 29 [2021-08-21 18:57:35,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:35,939 INFO L470 AbstractCegarLoop]: Abstraction has 4271 states and 9233 transitions. [2021-08-21 18:57:35,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:57:35,939 INFO L276 IsEmpty]: Start isEmpty. Operand 4271 states and 9233 transitions. [2021-08-21 18:57:35,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:57:35,944 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:35,944 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:57:35,970 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Ended with exit code 0 [2021-08-21 18:57:36,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-08-21 18:57:36,164 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:57:36,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:36,164 INFO L82 PathProgramCache]: Analyzing trace with hash 880686457, now seen corresponding path program 107 times [2021-08-21 18:57:36,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:36,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596828090] [2021-08-21 18:57:36,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:36,165 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:36,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:36,245 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:57:36,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:36,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596828090] [2021-08-21 18:57:36,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596828090] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:36,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296525900] [2021-08-21 18:57:36,246 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:57:36,246 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:36,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:36,247 INFO L229 MonitoredProcess]: Starting monitored process 197 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:57:36,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2021-08-21 18:57:40,117 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:57:40,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:40,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:57:40,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:40,255 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:57:40,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296525900] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:40,255 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:40,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:57:40,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787980175] [2021-08-21 18:57:40,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:57:40,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:40,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:57:40,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:57:40,255 INFO L87 Difference]: Start difference. First operand 4271 states and 9233 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:57:40,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:40,339 INFO L93 Difference]: Finished difference Result 4569 states and 9665 transitions. [2021-08-21 18:57:40,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:57:40,339 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:57:40,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:40,344 INFO L225 Difference]: With dead ends: 4569 [2021-08-21 18:57:40,344 INFO L226 Difference]: Without dead ends: 4564 [2021-08-21 18:57:40,345 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.2ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:57:40,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4564 states. [2021-08-21 18:57:40,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4564 to 4287. [2021-08-21 18:57:40,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4287 states, 4286 states have (on average 2.1619225384974334) internal successors, (9266), 4286 states have internal predecessors, (9266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:40,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4287 states to 4287 states and 9266 transitions. [2021-08-21 18:57:40,384 INFO L78 Accepts]: Start accepts. Automaton has 4287 states and 9266 transitions. Word has length 29 [2021-08-21 18:57:40,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:40,385 INFO L470 AbstractCegarLoop]: Abstraction has 4287 states and 9266 transitions. [2021-08-21 18:57:40,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:57:40,385 INFO L276 IsEmpty]: Start isEmpty. Operand 4287 states and 9266 transitions. [2021-08-21 18:57:40,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:57:40,389 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:40,389 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:57:40,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Forceful destruction successful, exit code 0 [2021-08-21 18:57:40,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211,197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:40,612 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:57:40,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:40,613 INFO L82 PathProgramCache]: Analyzing trace with hash -165448451, now seen corresponding path program 108 times [2021-08-21 18:57:40,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:40,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92161589] [2021-08-21 18:57:40,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:40,613 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:40,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:40,693 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:57:40,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:40,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92161589] [2021-08-21 18:57:40,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92161589] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:40,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352547720] [2021-08-21 18:57:40,693 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:57:40,693 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:40,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:40,694 INFO L229 MonitoredProcess]: Starting monitored process 198 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:57:40,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2021-08-21 18:57:44,384 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:57:44,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:44,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:57:44,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:44,510 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:57:44,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352547720] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:44,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:44,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:57:44,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113191112] [2021-08-21 18:57:44,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:57:44,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:44,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:57:44,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:57:44,511 INFO L87 Difference]: Start difference. First operand 4287 states and 9266 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:57:44,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:44,600 INFO L93 Difference]: Finished difference Result 4545 states and 9635 transitions. [2021-08-21 18:57:44,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:57:44,600 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:57:44,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:44,605 INFO L225 Difference]: With dead ends: 4545 [2021-08-21 18:57:44,605 INFO L226 Difference]: Without dead ends: 4540 [2021-08-21 18:57:44,605 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.3ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:57:44,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4540 states. [2021-08-21 18:57:44,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4540 to 4296. [2021-08-21 18:57:44,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4296 states, 4295 states have (on average 2.1613504074505236) internal successors, (9283), 4295 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:44,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4296 states to 4296 states and 9283 transitions. [2021-08-21 18:57:44,648 INFO L78 Accepts]: Start accepts. Automaton has 4296 states and 9283 transitions. Word has length 29 [2021-08-21 18:57:44,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:44,648 INFO L470 AbstractCegarLoop]: Abstraction has 4296 states and 9283 transitions. [2021-08-21 18:57:44,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:57:44,649 INFO L276 IsEmpty]: Start isEmpty. Operand 4296 states and 9283 transitions. [2021-08-21 18:57:44,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:57:44,653 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:44,653 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:57:44,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Forceful destruction successful, exit code 0 [2021-08-21 18:57:44,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-08-21 18:57:44,869 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:57:44,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:44,869 INFO L82 PathProgramCache]: Analyzing trace with hash -207905283, now seen corresponding path program 18 times [2021-08-21 18:57:44,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:44,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528278870] [2021-08-21 18:57:44,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:44,869 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:44,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:44,964 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:57:44,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:44,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528278870] [2021-08-21 18:57:44,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528278870] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:44,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359873983] [2021-08-21 18:57:44,965 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:57:44,965 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:44,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:44,966 INFO L229 MonitoredProcess]: Starting monitored process 199 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:57:44,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2021-08-21 18:57:48,530 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:57:48,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:48,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:57:48,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:48,666 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:57:48,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359873983] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:48,666 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:48,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:57:48,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627997543] [2021-08-21 18:57:48,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:57:48,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:48,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:57:48,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:57:48,667 INFO L87 Difference]: Start difference. First operand 4296 states and 9283 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:57:48,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:48,738 INFO L93 Difference]: Finished difference Result 4740 states and 10027 transitions. [2021-08-21 18:57:48,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:57:48,738 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:57:48,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:48,743 INFO L225 Difference]: With dead ends: 4740 [2021-08-21 18:57:48,743 INFO L226 Difference]: Without dead ends: 4707 [2021-08-21 18:57:48,744 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.9ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:57:48,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4707 states. [2021-08-21 18:57:48,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4707 to 4317. [2021-08-21 18:57:48,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4317 states, 4316 states have (on average 2.159406858202039) internal successors, (9320), 4316 states have internal predecessors, (9320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:48,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4317 states to 4317 states and 9320 transitions. [2021-08-21 18:57:48,782 INFO L78 Accepts]: Start accepts. Automaton has 4317 states and 9320 transitions. Word has length 29 [2021-08-21 18:57:48,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:48,783 INFO L470 AbstractCegarLoop]: Abstraction has 4317 states and 9320 transitions. [2021-08-21 18:57:48,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:57:48,783 INFO L276 IsEmpty]: Start isEmpty. Operand 4317 states and 9320 transitions. [2021-08-21 18:57:48,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:57:48,787 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:48,787 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:57:48,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Forceful destruction successful, exit code 0 [2021-08-21 18:57:49,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-08-21 18:57:49,009 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:57:49,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:49,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1858459071, now seen corresponding path program 109 times [2021-08-21 18:57:49,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:49,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263673950] [2021-08-21 18:57:49,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:49,009 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:49,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:49,087 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:57:49,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:49,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263673950] [2021-08-21 18:57:49,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263673950] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:49,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956835038] [2021-08-21 18:57:49,087 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:57:49,087 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:49,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:49,088 INFO L229 MonitoredProcess]: Starting monitored process 200 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:57:49,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2021-08-21 18:57:52,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:52,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:57:52,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:52,954 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:57:52,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956835038] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:52,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:52,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:57:52,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515988490] [2021-08-21 18:57:52,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:57:52,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:52,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:57:52,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:57:52,955 INFO L87 Difference]: Start difference. First operand 4317 states and 9320 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:57:53,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:53,042 INFO L93 Difference]: Finished difference Result 4652 states and 9818 transitions. [2021-08-21 18:57:53,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:57:53,042 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:57:53,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:53,047 INFO L225 Difference]: With dead ends: 4652 [2021-08-21 18:57:53,047 INFO L226 Difference]: Without dead ends: 4647 [2021-08-21 18:57:53,047 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.7ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:57:53,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4647 states. [2021-08-21 18:57:53,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4647 to 4334. [2021-08-21 18:57:53,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4334 states, 4333 states have (on average 2.160396953611816) internal successors, (9361), 4333 states have internal predecessors, (9361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:53,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4334 states to 4334 states and 9361 transitions. [2021-08-21 18:57:53,086 INFO L78 Accepts]: Start accepts. Automaton has 4334 states and 9361 transitions. Word has length 29 [2021-08-21 18:57:53,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:53,086 INFO L470 AbstractCegarLoop]: Abstraction has 4334 states and 9361 transitions. [2021-08-21 18:57:53,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:57:53,086 INFO L276 IsEmpty]: Start isEmpty. Operand 4334 states and 9361 transitions. [2021-08-21 18:57:53,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:57:53,091 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:53,091 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:57:53,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Forceful destruction successful, exit code 0 [2021-08-21 18:57:53,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:53,316 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:57:53,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:53,317 INFO L82 PathProgramCache]: Analyzing trace with hash -713474427, now seen corresponding path program 19 times [2021-08-21 18:57:53,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:53,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621761238] [2021-08-21 18:57:53,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:53,317 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:53,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:53,396 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:57:53,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:53,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621761238] [2021-08-21 18:57:53,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621761238] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:53,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763461075] [2021-08-21 18:57:53,397 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:57:53,397 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:53,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:53,398 INFO L229 MonitoredProcess]: Starting monitored process 201 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:57:53,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2021-08-21 18:57:57,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:57,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:57:57,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:57,388 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:57:57,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763461075] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:57,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:57,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:57:57,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238601264] [2021-08-21 18:57:57,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:57:57,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:57,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:57:57,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:57:57,389 INFO L87 Difference]: Start difference. First operand 4334 states and 9361 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:57:57,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:57,459 INFO L93 Difference]: Finished difference Result 4757 states and 10080 transitions. [2021-08-21 18:57:57,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:57:57,460 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:57:57,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:57,465 INFO L225 Difference]: With dead ends: 4757 [2021-08-21 18:57:57,465 INFO L226 Difference]: Without dead ends: 4748 [2021-08-21 18:57:57,465 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.6ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:57:57,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4748 states. [2021-08-21 18:57:57,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4748 to 4359. [2021-08-21 18:57:57,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4359 states, 4358 states have (on average 2.159247361174851) internal successors, (9410), 4358 states have internal predecessors, (9410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:57,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4359 states to 4359 states and 9410 transitions. [2021-08-21 18:57:57,508 INFO L78 Accepts]: Start accepts. Automaton has 4359 states and 9410 transitions. Word has length 29 [2021-08-21 18:57:57,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:57,508 INFO L470 AbstractCegarLoop]: Abstraction has 4359 states and 9410 transitions. [2021-08-21 18:57:57,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:57:57,508 INFO L276 IsEmpty]: Start isEmpty. Operand 4359 states and 9410 transitions. [2021-08-21 18:57:57,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:57:57,513 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:57,513 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:57:57,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Ended with exit code 0 [2021-08-21 18:57:57,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-08-21 18:57:57,737 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:57:57,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:57,737 INFO L82 PathProgramCache]: Analyzing trace with hash 2006026689, now seen corresponding path program 20 times [2021-08-21 18:57:57,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:57,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005770374] [2021-08-21 18:57:57,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:57,737 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:57,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:57,943 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:57:57,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:57,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005770374] [2021-08-21 18:57:57,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005770374] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:57,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818386419] [2021-08-21 18:57:57,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:57:57,944 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:57,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:57,952 INFO L229 MonitoredProcess]: Starting monitored process 202 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:57:57,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2021-08-21 18:58:01,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:58:01,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:58:01,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:58:01,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:58:01,879 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:58:01,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818386419] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:01,879 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:58:01,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:58:01,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373799831] [2021-08-21 18:58:01,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:58:01,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:01,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:58:01,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:58:01,880 INFO L87 Difference]: Start difference. First operand 4359 states and 9410 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:58:01,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:01,953 INFO L93 Difference]: Finished difference Result 4732 states and 10014 transitions. [2021-08-21 18:58:01,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:58:01,954 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:58:01,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:01,959 INFO L225 Difference]: With dead ends: 4732 [2021-08-21 18:58:01,959 INFO L226 Difference]: Without dead ends: 4727 [2021-08-21 18:58:01,959 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.3ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:58:01,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4727 states. [2021-08-21 18:58:01,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4727 to 4372. [2021-08-21 18:58:01,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4372 states, 4371 states have (on average 2.1576298329901626) internal successors, (9431), 4371 states have internal predecessors, (9431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:01,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4372 states to 4372 states and 9431 transitions. [2021-08-21 18:58:01,998 INFO L78 Accepts]: Start accepts. Automaton has 4372 states and 9431 transitions. Word has length 29 [2021-08-21 18:58:01,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:01,998 INFO L470 AbstractCegarLoop]: Abstraction has 4372 states and 9431 transitions. [2021-08-21 18:58:01,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:58:01,999 INFO L276 IsEmpty]: Start isEmpty. Operand 4372 states and 9431 transitions. [2021-08-21 18:58:02,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:58:02,003 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:02,003 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-21 18:58:02,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Forceful destruction successful, exit code 0 [2021-08-21 18:58:02,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:02,229 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:58:02,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:02,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1776603587, now seen corresponding path program 110 times [2021-08-21 18:58:02,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:02,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96720227] [2021-08-21 18:58:02,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:02,229 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:02,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:02,369 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:58:02,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:02,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96720227] [2021-08-21 18:58:02,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96720227] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:02,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747401419] [2021-08-21 18:58:02,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:58:02,370 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:02,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:58:02,371 INFO L229 MonitoredProcess]: Starting monitored process 203 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:58:02,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2021-08-21 18:58:06,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:58:06,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:58:06,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:58:06,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:58:06,269 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:58:06,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747401419] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:06,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:58:06,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:58:06,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625720388] [2021-08-21 18:58:06,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:58:06,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:06,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:58:06,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:58:06,271 INFO L87 Difference]: Start difference. First operand 4372 states and 9431 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:58:06,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:06,360 INFO L93 Difference]: Finished difference Result 4660 states and 9857 transitions. [2021-08-21 18:58:06,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:58:06,360 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:58:06,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:06,366 INFO L225 Difference]: With dead ends: 4660 [2021-08-21 18:58:06,366 INFO L226 Difference]: Without dead ends: 4655 [2021-08-21 18:58:06,366 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.5ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:58:06,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4655 states. [2021-08-21 18:58:06,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4655 to 4384. [2021-08-21 18:58:06,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4384 states, 4383 states have (on average 2.15833903718914) internal successors, (9460), 4383 states have internal predecessors, (9460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:06,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4384 states to 4384 states and 9460 transitions. [2021-08-21 18:58:06,410 INFO L78 Accepts]: Start accepts. Automaton has 4384 states and 9460 transitions. Word has length 29 [2021-08-21 18:58:06,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:06,410 INFO L470 AbstractCegarLoop]: Abstraction has 4384 states and 9460 transitions. [2021-08-21 18:58:06,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:58:06,410 INFO L276 IsEmpty]: Start isEmpty. Operand 4384 states and 9460 transitions. [2021-08-21 18:58:06,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:58:06,415 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:06,415 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:58:06,443 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Ended with exit code 0 [2021-08-21 18:58:06,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-08-21 18:58:06,641 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:58:06,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:06,641 INFO L82 PathProgramCache]: Analyzing trace with hash -631618943, now seen corresponding path program 21 times [2021-08-21 18:58:06,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:06,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178784747] [2021-08-21 18:58:06,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:06,641 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:06,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:06,723 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:58:06,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:06,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178784747] [2021-08-21 18:58:06,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178784747] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:06,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999191866] [2021-08-21 18:58:06,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:58:06,723 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:06,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:58:06,724 INFO L229 MonitoredProcess]: Starting monitored process 204 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:58:06,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2021-08-21 18:58:10,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:58:10,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:58:10,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:58:10,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:58:10,775 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:58:10,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999191866] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:10,775 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:58:10,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:58:10,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268387381] [2021-08-21 18:58:10,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:58:10,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:10,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:58:10,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:58:10,776 INFO L87 Difference]: Start difference. First operand 4384 states and 9460 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:58:10,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:10,848 INFO L93 Difference]: Finished difference Result 4761 states and 10095 transitions. [2021-08-21 18:58:10,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:58:10,848 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:58:10,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:10,854 INFO L225 Difference]: With dead ends: 4761 [2021-08-21 18:58:10,854 INFO L226 Difference]: Without dead ends: 4752 [2021-08-21 18:58:10,855 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.5ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:58:10,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4752 states. [2021-08-21 18:58:10,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4752 to 4407. [2021-08-21 18:58:10,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4407 states, 4406 states have (on average 2.157739446209714) internal successors, (9507), 4406 states have internal predecessors, (9507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:10,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4407 states to 4407 states and 9507 transitions. [2021-08-21 18:58:10,897 INFO L78 Accepts]: Start accepts. Automaton has 4407 states and 9507 transitions. Word has length 29 [2021-08-21 18:58:10,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:10,897 INFO L470 AbstractCegarLoop]: Abstraction has 4407 states and 9507 transitions. [2021-08-21 18:58:10,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:58:10,897 INFO L276 IsEmpty]: Start isEmpty. Operand 4407 states and 9507 transitions. [2021-08-21 18:58:10,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:58:10,902 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:10,902 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:58:10,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Forceful destruction successful, exit code 0 [2021-08-21 18:58:11,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable218 [2021-08-21 18:58:11,121 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:58:11,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:11,121 INFO L82 PathProgramCache]: Analyzing trace with hash 2087882173, now seen corresponding path program 22 times [2021-08-21 18:58:11,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:11,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586700594] [2021-08-21 18:58:11,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:11,121 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:11,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:11,201 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:58:11,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:11,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586700594] [2021-08-21 18:58:11,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586700594] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:11,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811592494] [2021-08-21 18:58:11,202 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:58:11,202 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:11,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:58:11,202 INFO L229 MonitoredProcess]: Starting monitored process 205 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:58:11,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2021-08-21 18:58:15,037 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:58:15,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:58:15,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:58:15,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:58:15,172 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:58:15,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811592494] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:15,172 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:58:15,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:58:15,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147878211] [2021-08-21 18:58:15,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:58:15,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:15,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:58:15,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:58:15,173 INFO L87 Difference]: Start difference. First operand 4407 states and 9507 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:58:15,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:15,248 INFO L93 Difference]: Finished difference Result 4738 states and 10040 transitions. [2021-08-21 18:58:15,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:58:15,248 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:58:15,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:15,253 INFO L225 Difference]: With dead ends: 4738 [2021-08-21 18:58:15,253 INFO L226 Difference]: Without dead ends: 4733 [2021-08-21 18:58:15,254 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.3ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:58:15,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4733 states. [2021-08-21 18:58:15,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4733 to 4418. [2021-08-21 18:58:15,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4418 states, 4417 states have (on average 2.1566674213266923) internal successors, (9526), 4417 states have internal predecessors, (9526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:15,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4418 states to 4418 states and 9526 transitions. [2021-08-21 18:58:15,299 INFO L78 Accepts]: Start accepts. Automaton has 4418 states and 9526 transitions. Word has length 29 [2021-08-21 18:58:15,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:15,299 INFO L470 AbstractCegarLoop]: Abstraction has 4418 states and 9526 transitions. [2021-08-21 18:58:15,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:58:15,299 INFO L276 IsEmpty]: Start isEmpty. Operand 4418 states and 9526 transitions. [2021-08-21 18:58:15,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:58:15,304 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:15,304 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:58:15,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Forceful destruction successful, exit code 0 [2021-08-21 18:58:15,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,205 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:15,519 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:58:15,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:15,519 INFO L82 PathProgramCache]: Analyzing trace with hash 776206901, now seen corresponding path program 23 times [2021-08-21 18:58:15,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:15,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321543572] [2021-08-21 18:58:15,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:15,520 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:15,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:15,598 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:58:15,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:15,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321543572] [2021-08-21 18:58:15,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321543572] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:15,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284401729] [2021-08-21 18:58:15,598 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:58:15,598 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:15,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:58:15,599 INFO L229 MonitoredProcess]: Starting monitored process 206 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:58:15,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2021-08-21 18:58:19,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:58:19,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:58:19,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:58:19,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:58:19,577 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:58:19,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284401729] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:19,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:58:19,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:58:19,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520834530] [2021-08-21 18:58:19,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:58:19,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:19,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:58:19,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:58:19,577 INFO L87 Difference]: Start difference. First operand 4418 states and 9526 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:58:19,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:19,654 INFO L93 Difference]: Finished difference Result 4749 states and 10071 transitions. [2021-08-21 18:58:19,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:58:19,654 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:58:19,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:19,659 INFO L225 Difference]: With dead ends: 4749 [2021-08-21 18:58:19,659 INFO L226 Difference]: Without dead ends: 4744 [2021-08-21 18:58:19,660 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.5ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:58:19,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4744 states. [2021-08-21 18:58:19,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4744 to 4434. [2021-08-21 18:58:19,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4434 states, 4433 states have (on average 2.156778705165802) internal successors, (9561), 4433 states have internal predecessors, (9561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:19,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4434 states to 4434 states and 9561 transitions. [2021-08-21 18:58:19,702 INFO L78 Accepts]: Start accepts. Automaton has 4434 states and 9561 transitions. Word has length 29 [2021-08-21 18:58:19,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:19,702 INFO L470 AbstractCegarLoop]: Abstraction has 4434 states and 9561 transitions. [2021-08-21 18:58:19,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:58:19,702 INFO L276 IsEmpty]: Start isEmpty. Operand 4434 states and 9561 transitions. [2021-08-21 18:58:19,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:58:19,707 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:19,707 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:58:19,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Forceful destruction successful, exit code 0 [2021-08-21 18:58:19,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:19,916 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:58:19,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:19,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1071697031, now seen corresponding path program 24 times [2021-08-21 18:58:19,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:19,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961560899] [2021-08-21 18:58:19,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:19,917 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:19,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:20,001 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:58:20,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:20,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961560899] [2021-08-21 18:58:20,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961560899] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:20,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290328256] [2021-08-21 18:58:20,002 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:58:20,002 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:20,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:58:20,003 INFO L229 MonitoredProcess]: Starting monitored process 207 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:58:20,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2021-08-21 18:58:23,943 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:58:23,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:58:23,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:58:23,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:58:24,088 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:58:24,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290328256] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:24,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:58:24,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:58:24,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290453537] [2021-08-21 18:58:24,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:58:24,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:24,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:58:24,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:58:24,089 INFO L87 Difference]: Start difference. First operand 4434 states and 9561 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:58:24,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:24,156 INFO L93 Difference]: Finished difference Result 4780 states and 10140 transitions. [2021-08-21 18:58:24,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:58:24,156 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:58:24,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:24,162 INFO L225 Difference]: With dead ends: 4780 [2021-08-21 18:58:24,162 INFO L226 Difference]: Without dead ends: 4771 [2021-08-21 18:58:24,162 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.0ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:58:24,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4771 states. [2021-08-21 18:58:24,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4771 to 4448. [2021-08-21 18:58:24,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4448 states, 4447 states have (on average 2.1551607825500336) internal successors, (9584), 4447 states have internal predecessors, (9584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:24,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4448 states to 4448 states and 9584 transitions. [2021-08-21 18:58:24,215 INFO L78 Accepts]: Start accepts. Automaton has 4448 states and 9584 transitions. Word has length 29 [2021-08-21 18:58:24,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:24,215 INFO L470 AbstractCegarLoop]: Abstraction has 4448 states and 9584 transitions. [2021-08-21 18:58:24,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:58:24,215 INFO L276 IsEmpty]: Start isEmpty. Operand 4448 states and 9584 transitions. [2021-08-21 18:58:24,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:58:24,221 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:24,221 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:58:24,250 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Ended with exit code 0 [2021-08-21 18:58:24,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-08-21 18:58:24,450 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:58:24,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:24,450 INFO L82 PathProgramCache]: Analyzing trace with hash 2128577409, now seen corresponding path program 18 times [2021-08-21 18:58:24,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:24,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054885703] [2021-08-21 18:58:24,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:24,450 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:24,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:24,546 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:58:24,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:24,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054885703] [2021-08-21 18:58:24,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054885703] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:24,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375942122] [2021-08-21 18:58:24,546 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:58:24,546 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:24,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:58:24,547 INFO L229 MonitoredProcess]: Starting monitored process 208 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:58:24,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2021-08-21 18:58:28,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:58:28,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:58:28,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:58:28,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:58:28,631 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:58:28,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375942122] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:28,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:58:28,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:58:28,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521694361] [2021-08-21 18:58:28,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:58:28,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:28,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:58:28,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:58:28,632 INFO L87 Difference]: Start difference. First operand 4448 states and 9584 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:58:28,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:28,706 INFO L93 Difference]: Finished difference Result 4885 states and 10359 transitions. [2021-08-21 18:58:28,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:58:28,706 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:58:28,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:28,712 INFO L225 Difference]: With dead ends: 4885 [2021-08-21 18:58:28,713 INFO L226 Difference]: Without dead ends: 4852 [2021-08-21 18:58:28,713 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.9ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:58:28,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4852 states. [2021-08-21 18:58:28,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4852 to 4559. [2021-08-21 18:58:28,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4559 states, 4558 states have (on average 2.150285212812637) internal successors, (9801), 4558 states have internal predecessors, (9801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:28,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4559 states to 4559 states and 9801 transitions. [2021-08-21 18:58:28,761 INFO L78 Accepts]: Start accepts. Automaton has 4559 states and 9801 transitions. Word has length 29 [2021-08-21 18:58:28,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:28,761 INFO L470 AbstractCegarLoop]: Abstraction has 4559 states and 9801 transitions. [2021-08-21 18:58:28,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:58:28,762 INFO L276 IsEmpty]: Start isEmpty. Operand 4559 states and 9801 transitions. [2021-08-21 18:58:28,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:58:28,767 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:28,767 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:58:28,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Forceful destruction successful, exit code 0 [2021-08-21 18:58:28,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-08-21 18:58:28,973 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:58:28,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:28,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1585555777, now seen corresponding path program 19 times [2021-08-21 18:58:28,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:28,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998570610] [2021-08-21 18:58:28,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:28,973 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:28,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:29,055 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:58:29,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:29,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998570610] [2021-08-21 18:58:29,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998570610] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:29,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62873414] [2021-08-21 18:58:29,056 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:58:29,056 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:29,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:58:29,056 INFO L229 MonitoredProcess]: Starting monitored process 209 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:58:29,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2021-08-21 18:58:33,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:33,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:58:33,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:58:33,222 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:58:33,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62873414] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:33,222 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:58:33,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:58:33,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746577469] [2021-08-21 18:58:33,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:58:33,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:33,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:58:33,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:58:33,222 INFO L87 Difference]: Start difference. First operand 4559 states and 9801 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:58:33,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:33,287 INFO L93 Difference]: Finished difference Result 5009 states and 10583 transitions. [2021-08-21 18:58:33,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:58:33,287 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:58:33,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:33,292 INFO L225 Difference]: With dead ends: 5009 [2021-08-21 18:58:33,292 INFO L226 Difference]: Without dead ends: 5000 [2021-08-21 18:58:33,292 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.0ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:58:33,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5000 states. [2021-08-21 18:58:33,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5000 to 4676. [2021-08-21 18:58:33,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4676 states, 4675 states have (on average 2.1398930481283425) internal successors, (10004), 4675 states have internal predecessors, (10004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:33,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4676 states to 4676 states and 10004 transitions. [2021-08-21 18:58:33,336 INFO L78 Accepts]: Start accepts. Automaton has 4676 states and 10004 transitions. Word has length 29 [2021-08-21 18:58:33,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:33,336 INFO L470 AbstractCegarLoop]: Abstraction has 4676 states and 10004 transitions. [2021-08-21 18:58:33,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:58:33,336 INFO L276 IsEmpty]: Start isEmpty. Operand 4676 states and 10004 transitions. [2021-08-21 18:58:33,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:58:33,341 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:33,341 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:58:33,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Forceful destruction successful, exit code 0 [2021-08-21 18:58:33,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-08-21 18:58:33,566 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:58:33,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:33,567 INFO L82 PathProgramCache]: Analyzing trace with hash 10089597, now seen corresponding path program 20 times [2021-08-21 18:58:33,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:33,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5767449] [2021-08-21 18:58:33,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:33,567 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:33,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:33,674 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:58:33,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:33,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5767449] [2021-08-21 18:58:33,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5767449] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:33,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558892934] [2021-08-21 18:58:33,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:58:33,674 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:33,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:58:33,675 INFO L229 MonitoredProcess]: Starting monitored process 210 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:58:33,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2021-08-21 18:58:37,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:58:37,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:58:37,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:58:37,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:58:37,810 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:58:37,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558892934] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:37,811 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:58:37,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:58:37,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811678811] [2021-08-21 18:58:37,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:58:37,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:37,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:58:37,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:58:37,811 INFO L87 Difference]: Start difference. First operand 4676 states and 10004 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:58:37,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:37,884 INFO L93 Difference]: Finished difference Result 5060 states and 10630 transitions. [2021-08-21 18:58:37,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:58:37,885 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:58:37,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:37,890 INFO L225 Difference]: With dead ends: 5060 [2021-08-21 18:58:37,891 INFO L226 Difference]: Without dead ends: 5055 [2021-08-21 18:58:37,891 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 59.4ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:58:37,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5055 states. [2021-08-21 18:58:37,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5055 to 4769. [2021-08-21 18:58:37,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4769 states, 4768 states have (on average 2.1348573825503356) internal successors, (10179), 4768 states have internal predecessors, (10179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:37,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4769 states to 4769 states and 10179 transitions. [2021-08-21 18:58:37,942 INFO L78 Accepts]: Start accepts. Automaton has 4769 states and 10179 transitions. Word has length 29 [2021-08-21 18:58:37,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:37,942 INFO L470 AbstractCegarLoop]: Abstraction has 4769 states and 10179 transitions. [2021-08-21 18:58:37,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:58:37,943 INFO L276 IsEmpty]: Start isEmpty. Operand 4769 states and 10179 transitions. [2021-08-21 18:58:37,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:58:37,948 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:37,948 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:58:37,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Forceful destruction successful, exit code 0 [2021-08-21 18:58:38,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-08-21 18:58:38,164 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:58:38,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:38,164 INFO L82 PathProgramCache]: Analyzing trace with hash 2142385605, now seen corresponding path program 21 times [2021-08-21 18:58:38,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:38,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010996747] [2021-08-21 18:58:38,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:38,164 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:38,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:38,287 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:58:38,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:38,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010996747] [2021-08-21 18:58:38,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010996747] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:38,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370538922] [2021-08-21 18:58:38,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:58:38,288 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:38,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:58:38,289 INFO L229 MonitoredProcess]: Starting monitored process 211 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:58:38,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2021-08-21 18:58:42,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:58:42,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:58:42,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:58:42,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:58:42,375 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:58:42,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370538922] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:42,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:58:42,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:58:42,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914656972] [2021-08-21 18:58:42,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:58:42,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:42,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:58:42,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:58:42,376 INFO L87 Difference]: Start difference. First operand 4769 states and 10179 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:58:42,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:42,451 INFO L93 Difference]: Finished difference Result 5120 states and 10786 transitions. [2021-08-21 18:58:42,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:58:42,451 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:58:42,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:42,457 INFO L225 Difference]: With dead ends: 5120 [2021-08-21 18:58:42,458 INFO L226 Difference]: Without dead ends: 5111 [2021-08-21 18:58:42,458 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 77.2ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:58:42,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5111 states. [2021-08-21 18:58:42,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5111 to 4827. [2021-08-21 18:58:42,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4827 states, 4826 states have (on average 2.132822213012847) internal successors, (10293), 4826 states have internal predecessors, (10293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:42,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4827 states to 4827 states and 10293 transitions. [2021-08-21 18:58:42,505 INFO L78 Accepts]: Start accepts. Automaton has 4827 states and 10293 transitions. Word has length 29 [2021-08-21 18:58:42,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:42,505 INFO L470 AbstractCegarLoop]: Abstraction has 4827 states and 10293 transitions. [2021-08-21 18:58:42,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:58:42,505 INFO L276 IsEmpty]: Start isEmpty. Operand 4827 states and 10293 transitions. [2021-08-21 18:58:42,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:58:42,510 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:42,511 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:58:42,538 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Ended with exit code 0 [2021-08-21 18:58:42,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-08-21 18:58:42,717 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:58:42,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:42,717 INFO L82 PathProgramCache]: Analyzing trace with hash 566919425, now seen corresponding path program 22 times [2021-08-21 18:58:42,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:42,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009839867] [2021-08-21 18:58:42,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:42,718 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:42,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:42,793 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:58:42,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:42,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009839867] [2021-08-21 18:58:42,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009839867] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:42,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083389279] [2021-08-21 18:58:42,794 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:58:42,794 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:42,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:58:42,795 INFO L229 MonitoredProcess]: Starting monitored process 212 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:58:42,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2021-08-21 18:58:46,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:58:46,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:58:46,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:58:46,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:58:46,955 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:58:46,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083389279] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:46,955 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:58:46,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:58:46,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957682923] [2021-08-21 18:58:46,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:58:46,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:46,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:58:46,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:58:46,956 INFO L87 Difference]: Start difference. First operand 4827 states and 10293 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:58:47,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:47,030 INFO L93 Difference]: Finished difference Result 5116 states and 10749 transitions. [2021-08-21 18:58:47,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:58:47,030 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:58:47,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:47,036 INFO L225 Difference]: With dead ends: 5116 [2021-08-21 18:58:47,036 INFO L226 Difference]: Without dead ends: 5111 [2021-08-21 18:58:47,036 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.1ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:58:47,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5111 states. [2021-08-21 18:58:47,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5111 to 4868. [2021-08-21 18:58:47,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4868 states, 4867 states have (on average 2.13149784261352) internal successors, (10374), 4867 states have internal predecessors, (10374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:47,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4868 states to 4868 states and 10374 transitions. [2021-08-21 18:58:47,081 INFO L78 Accepts]: Start accepts. Automaton has 4868 states and 10374 transitions. Word has length 29 [2021-08-21 18:58:47,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:47,081 INFO L470 AbstractCegarLoop]: Abstraction has 4868 states and 10374 transitions. [2021-08-21 18:58:47,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:58:47,081 INFO L276 IsEmpty]: Start isEmpty. Operand 4868 states and 10374 transitions. [2021-08-21 18:58:47,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:58:47,086 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:47,086 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:58:47,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Forceful destruction successful, exit code 0 [2021-08-21 18:58:47,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,212 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:47,312 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:58:47,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:47,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1861209279, now seen corresponding path program 23 times [2021-08-21 18:58:47,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:47,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345129234] [2021-08-21 18:58:47,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:47,313 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:47,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:47,394 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:58:47,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:47,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345129234] [2021-08-21 18:58:47,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345129234] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:47,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849231193] [2021-08-21 18:58:47,394 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:58:47,394 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:47,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:58:47,395 INFO L229 MonitoredProcess]: Starting monitored process 213 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:58:47,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2021-08-21 18:58:51,315 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:58:51,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:58:51,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:58:51,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:58:51,450 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:58:51,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849231193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:51,450 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:58:51,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:58:51,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457948300] [2021-08-21 18:58:51,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:58:51,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:51,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:58:51,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:58:51,451 INFO L87 Difference]: Start difference. First operand 4868 states and 10374 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:58:51,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:51,524 INFO L93 Difference]: Finished difference Result 5196 states and 10901 transitions. [2021-08-21 18:58:51,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:58:51,524 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:58:51,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:51,530 INFO L225 Difference]: With dead ends: 5196 [2021-08-21 18:58:51,530 INFO L226 Difference]: Without dead ends: 5191 [2021-08-21 18:58:51,530 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.5ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:58:51,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5191 states. [2021-08-21 18:58:51,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5191 to 4880. [2021-08-21 18:58:51,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4880 states, 4879 states have (on average 2.1285099405615906) internal successors, (10385), 4879 states have internal predecessors, (10385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:51,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4880 states to 4880 states and 10385 transitions. [2021-08-21 18:58:51,574 INFO L78 Accepts]: Start accepts. Automaton has 4880 states and 10385 transitions. Word has length 29 [2021-08-21 18:58:51,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:51,575 INFO L470 AbstractCegarLoop]: Abstraction has 4880 states and 10385 transitions. [2021-08-21 18:58:51,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:58:51,575 INFO L276 IsEmpty]: Start isEmpty. Operand 4880 states and 10385 transitions. [2021-08-21 18:58:51,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:58:51,631 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:51,631 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:58:51,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Forceful destruction successful, exit code 0 [2021-08-21 18:58:51,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,213 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:51,836 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:58:51,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:51,836 INFO L82 PathProgramCache]: Analyzing trace with hash 585854085, now seen corresponding path program 24 times [2021-08-21 18:58:51,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:51,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964961283] [2021-08-21 18:58:51,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:51,836 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:51,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:51,925 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:58:51,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:51,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964961283] [2021-08-21 18:58:51,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964961283] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:51,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989946738] [2021-08-21 18:58:51,926 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:58:51,926 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:51,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:58:51,926 INFO L229 MonitoredProcess]: Starting monitored process 214 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:58:51,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2021-08-21 18:58:56,037 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:58:56,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:58:56,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:58:56,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:58:56,178 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:58:56,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989946738] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:56,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:58:56,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 18:58:56,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494151809] [2021-08-21 18:58:56,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:58:56,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:56,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:58:56,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:58:56,179 INFO L87 Difference]: Start difference. First operand 4880 states and 10385 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:58:56,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:56,249 INFO L93 Difference]: Finished difference Result 5302 states and 11119 transitions. [2021-08-21 18:58:56,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:58:56,249 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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 [2021-08-21 18:58:56,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:56,255 INFO L225 Difference]: With dead ends: 5302 [2021-08-21 18:58:56,255 INFO L226 Difference]: Without dead ends: 5293 [2021-08-21 18:58:56,255 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.6ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:58:56,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5293 states. [2021-08-21 18:58:56,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5293 to 4999. [2021-08-21 18:58:56,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4999 states, 4998 states have (on average 2.122448979591837) internal successors, (10608), 4998 states have internal predecessors, (10608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:56,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4999 states to 4999 states and 10608 transitions. [2021-08-21 18:58:56,301 INFO L78 Accepts]: Start accepts. Automaton has 4999 states and 10608 transitions. Word has length 29 [2021-08-21 18:58:56,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:56,301 INFO L470 AbstractCegarLoop]: Abstraction has 4999 states and 10608 transitions. [2021-08-21 18:58:56,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 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) [2021-08-21 18:58:56,301 INFO L276 IsEmpty]: Start isEmpty. Operand 4999 states and 10608 transitions. [2021-08-21 18:58:56,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:58:56,307 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:56,307 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:58:56,336 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Ended with exit code 0 [2021-08-21 18:58:56,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-08-21 18:58:56,521 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:58:56,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:56,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1758061661, now seen corresponding path program 111 times [2021-08-21 18:58:56,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:56,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916606669] [2021-08-21 18:58:56,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:56,521 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:56,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:56,616 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:58:56,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:56,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916606669] [2021-08-21 18:58:56,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916606669] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:56,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878599762] [2021-08-21 18:58:56,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:58:56,617 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:56,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:58:56,618 INFO L229 MonitoredProcess]: Starting monitored process 215 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:58:56,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2021-08-21 18:59:00,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:59:00,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:59:00,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 18:59:00,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:59:00,558 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:59:00,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878599762] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:00,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:59:00,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 18:59:00,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568678341] [2021-08-21 18:59:00,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 18:59:00,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:59:00,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 18:59:00,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:59:00,559 INFO L87 Difference]: Start difference. First operand 4999 states and 10608 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:00,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:59:00,646 INFO L93 Difference]: Finished difference Result 5289 states and 11059 transitions. [2021-08-21 18:59:00,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 18:59:00,646 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:59:00,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:59:00,652 INFO L225 Difference]: With dead ends: 5289 [2021-08-21 18:59:00,652 INFO L226 Difference]: Without dead ends: 5256 [2021-08-21 18:59:00,652 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.7ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:59:00,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5256 states. [2021-08-21 18:59:00,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5256 to 4871. [2021-08-21 18:59:00,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4871 states, 4870 states have (on average 2.131622176591376) internal successors, (10381), 4870 states have internal predecessors, (10381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:00,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4871 states to 4871 states and 10381 transitions. [2021-08-21 18:59:00,699 INFO L78 Accepts]: Start accepts. Automaton has 4871 states and 10381 transitions. Word has length 32 [2021-08-21 18:59:00,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:59:00,699 INFO L470 AbstractCegarLoop]: Abstraction has 4871 states and 10381 transitions. [2021-08-21 18:59:00,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:00,700 INFO L276 IsEmpty]: Start isEmpty. Operand 4871 states and 10381 transitions. [2021-08-21 18:59:00,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:59:00,705 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:59:00,705 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:59:00,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Forceful destruction successful, exit code 0 [2021-08-21 18:59:00,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,215 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:00,933 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:59:00,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:59:00,933 INFO L82 PathProgramCache]: Analyzing trace with hash 482522713, now seen corresponding path program 112 times [2021-08-21 18:59:00,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:59:00,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540185395] [2021-08-21 18:59:00,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:59:00,933 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:59:00,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:01,026 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:59:01,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:59:01,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540185395] [2021-08-21 18:59:01,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540185395] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:01,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735674658] [2021-08-21 18:59:01,026 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:59:01,026 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:01,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:59:01,027 INFO L229 MonitoredProcess]: Starting monitored process 216 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:59:01,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2021-08-21 18:59:05,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:59:05,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:59:05,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 18:59:05,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:59:05,240 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:59:05,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735674658] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:05,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:59:05,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 18:59:05,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61303275] [2021-08-21 18:59:05,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 18:59:05,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:59:05,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 18:59:05,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:59:05,241 INFO L87 Difference]: Start difference. First operand 4871 states and 10381 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:05,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:59:05,336 INFO L93 Difference]: Finished difference Result 5214 states and 10876 transitions. [2021-08-21 18:59:05,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 18:59:05,337 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:59:05,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:59:05,345 INFO L225 Difference]: With dead ends: 5214 [2021-08-21 18:59:05,345 INFO L226 Difference]: Without dead ends: 5181 [2021-08-21 18:59:05,345 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.8ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:59:05,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5181 states. [2021-08-21 18:59:05,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5181 to 4786. [2021-08-21 18:59:05,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4786 states, 4785 states have (on average 2.133960292580982) internal successors, (10211), 4785 states have internal predecessors, (10211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:05,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4786 states to 4786 states and 10211 transitions. [2021-08-21 18:59:05,395 INFO L78 Accepts]: Start accepts. Automaton has 4786 states and 10211 transitions. Word has length 32 [2021-08-21 18:59:05,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:59:05,395 INFO L470 AbstractCegarLoop]: Abstraction has 4786 states and 10211 transitions. [2021-08-21 18:59:05,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:05,395 INFO L276 IsEmpty]: Start isEmpty. Operand 4786 states and 10211 transitions. [2021-08-21 18:59:05,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:59:05,402 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:59:05,402 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:59:05,435 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Ended with exit code 0 [2021-08-21 18:59:05,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,216 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:05,625 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:59:05,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:59:05,625 INFO L82 PathProgramCache]: Analyzing trace with hash -60498919, now seen corresponding path program 113 times [2021-08-21 18:59:05,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:59:05,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166087424] [2021-08-21 18:59:05,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:59:05,625 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:59:05,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:05,720 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:59:05,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:59:05,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166087424] [2021-08-21 18:59:05,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166087424] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:05,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311338857] [2021-08-21 18:59:05,721 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:59:05,721 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:05,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:59:05,722 INFO L229 MonitoredProcess]: Starting monitored process 217 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:59:05,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2021-08-21 18:59:09,675 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:59:09,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:59:09,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 18:59:09,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:59:09,835 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:59:09,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311338857] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:09,835 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:59:09,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 18:59:09,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711450601] [2021-08-21 18:59:09,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 18:59:09,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:59:09,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 18:59:09,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:59:09,836 INFO L87 Difference]: Start difference. First operand 4786 states and 10211 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:09,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:59:09,928 INFO L93 Difference]: Finished difference Result 5185 states and 10821 transitions. [2021-08-21 18:59:09,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 18:59:09,928 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:59:09,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:59:09,934 INFO L225 Difference]: With dead ends: 5185 [2021-08-21 18:59:09,934 INFO L226 Difference]: Without dead ends: 5176 [2021-08-21 18:59:09,934 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:59:09,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5176 states. [2021-08-21 18:59:09,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5176 to 4795. [2021-08-21 18:59:09,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4795 states, 4794 states have (on average 2.130162703379224) internal successors, (10212), 4794 states have internal predecessors, (10212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:09,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4795 states to 4795 states and 10212 transitions. [2021-08-21 18:59:09,982 INFO L78 Accepts]: Start accepts. Automaton has 4795 states and 10212 transitions. Word has length 32 [2021-08-21 18:59:09,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:59:09,982 INFO L470 AbstractCegarLoop]: Abstraction has 4795 states and 10212 transitions. [2021-08-21 18:59:09,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:09,983 INFO L276 IsEmpty]: Start isEmpty. Operand 4795 states and 10212 transitions. [2021-08-21 18:59:09,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:59:09,990 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:59:09,990 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:59:10,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Ended with exit code 0 [2021-08-21 18:59:10,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,217 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:10,217 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:59:10,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:59:10,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1635965099, now seen corresponding path program 114 times [2021-08-21 18:59:10,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:59:10,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182975697] [2021-08-21 18:59:10,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:59:10,217 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:59:10,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:10,315 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:59:10,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:59:10,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182975697] [2021-08-21 18:59:10,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182975697] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:10,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836746479] [2021-08-21 18:59:10,316 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:59:10,316 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:10,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:59:10,317 INFO L229 MonitoredProcess]: Starting monitored process 218 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:59:10,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2021-08-21 18:59:14,456 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:59:14,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:59:14,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 18:59:14,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:59:14,607 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:59:14,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836746479] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:14,607 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:59:14,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 18:59:14,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580868047] [2021-08-21 18:59:14,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 18:59:14,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:59:14,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 18:59:14,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:59:14,608 INFO L87 Difference]: Start difference. First operand 4795 states and 10212 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:14,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:59:14,703 INFO L93 Difference]: Finished difference Result 5284 states and 10946 transitions. [2021-08-21 18:59:14,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 18:59:14,704 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:59:14,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:59:14,710 INFO L225 Difference]: With dead ends: 5284 [2021-08-21 18:59:14,710 INFO L226 Difference]: Without dead ends: 5279 [2021-08-21 18:59:14,710 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.7ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:59:14,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5279 states. [2021-08-21 18:59:14,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5279 to 4927. [2021-08-21 18:59:14,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4927 states, 4926 states have (on average 2.1272838002436054) internal successors, (10479), 4926 states have internal predecessors, (10479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:14,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4927 states to 4927 states and 10479 transitions. [2021-08-21 18:59:14,838 INFO L78 Accepts]: Start accepts. Automaton has 4927 states and 10479 transitions. Word has length 32 [2021-08-21 18:59:14,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:59:14,838 INFO L470 AbstractCegarLoop]: Abstraction has 4927 states and 10479 transitions. [2021-08-21 18:59:14,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:14,838 INFO L276 IsEmpty]: Start isEmpty. Operand 4927 states and 10479 transitions. [2021-08-21 18:59:14,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:59:14,843 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:59:14,843 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:59:14,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Forceful destruction successful, exit code 0 [2021-08-21 18:59:15,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-08-21 18:59:15,059 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:59:15,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:59:15,059 INFO L82 PathProgramCache]: Analyzing trace with hash 496330909, now seen corresponding path program 115 times [2021-08-21 18:59:15,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:59:15,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434126255] [2021-08-21 18:59:15,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:59:15,060 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:59:15,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:15,153 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:59:15,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:59:15,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434126255] [2021-08-21 18:59:15,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434126255] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:15,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083906665] [2021-08-21 18:59:15,154 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:59:15,154 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:15,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:59:15,155 INFO L229 MonitoredProcess]: Starting monitored process 219 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:59:15,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2021-08-21 18:59:19,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:19,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 18:59:19,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:59:19,341 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:59:19,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083906665] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:19,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:59:19,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 18:59:19,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584436037] [2021-08-21 18:59:19,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 18:59:19,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:59:19,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 18:59:19,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:59:19,342 INFO L87 Difference]: Start difference. First operand 4927 states and 10479 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:19,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:59:19,435 INFO L93 Difference]: Finished difference Result 5229 states and 10892 transitions. [2021-08-21 18:59:19,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 18:59:19,436 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:59:19,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:59:19,441 INFO L225 Difference]: With dead ends: 5229 [2021-08-21 18:59:19,441 INFO L226 Difference]: Without dead ends: 5220 [2021-08-21 18:59:19,442 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.8ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:59:19,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5220 states. [2021-08-21 18:59:19,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5220 to 4792. [2021-08-21 18:59:19,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4792 states, 4791 states have (on average 2.1327489041953664) internal successors, (10218), 4791 states have internal predecessors, (10218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:19,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4792 states to 4792 states and 10218 transitions. [2021-08-21 18:59:19,502 INFO L78 Accepts]: Start accepts. Automaton has 4792 states and 10218 transitions. Word has length 32 [2021-08-21 18:59:19,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:59:19,502 INFO L470 AbstractCegarLoop]: Abstraction has 4792 states and 10218 transitions. [2021-08-21 18:59:19,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:19,503 INFO L276 IsEmpty]: Start isEmpty. Operand 4792 states and 10218 transitions. [2021-08-21 18:59:19,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:59:19,510 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:59:19,510 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:59:19,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Forceful destruction successful, exit code 0 [2021-08-21 18:59:19,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-08-21 18:59:19,729 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:59:19,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:59:19,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1079135271, now seen corresponding path program 116 times [2021-08-21 18:59:19,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:59:19,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721524665] [2021-08-21 18:59:19,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:59:19,729 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:59:19,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:19,826 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:59:19,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:59:19,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721524665] [2021-08-21 18:59:19,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721524665] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:19,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259581081] [2021-08-21 18:59:19,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:59:19,826 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:19,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:59:19,827 INFO L229 MonitoredProcess]: Starting monitored process 220 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:59:19,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2021-08-21 18:59:24,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:59:24,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:59:24,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 18:59:24,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:59:24,163 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:59:24,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259581081] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:24,163 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:59:24,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 18:59:24,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164846002] [2021-08-21 18:59:24,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 18:59:24,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:59:24,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 18:59:24,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:59:24,164 INFO L87 Difference]: Start difference. First operand 4792 states and 10218 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:24,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:59:24,264 INFO L93 Difference]: Finished difference Result 5137 states and 10702 transitions. [2021-08-21 18:59:24,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 18:59:24,264 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:59:24,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:59:24,270 INFO L225 Difference]: With dead ends: 5137 [2021-08-21 18:59:24,270 INFO L226 Difference]: Without dead ends: 5132 [2021-08-21 18:59:24,270 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.6ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:59:24,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5132 states. [2021-08-21 18:59:24,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5132 to 4789. [2021-08-21 18:59:24,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4789 states, 4788 states have (on average 2.134502923976608) internal successors, (10220), 4788 states have internal predecessors, (10220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:24,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4789 states to 4789 states and 10220 transitions. [2021-08-21 18:59:24,313 INFO L78 Accepts]: Start accepts. Automaton has 4789 states and 10220 transitions. Word has length 32 [2021-08-21 18:59:24,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:59:24,313 INFO L470 AbstractCegarLoop]: Abstraction has 4789 states and 10220 transitions. [2021-08-21 18:59:24,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:24,313 INFO L276 IsEmpty]: Start isEmpty. Operand 4789 states and 10220 transitions. [2021-08-21 18:59:24,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:59:24,318 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:59:24,318 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:59:24,348 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Ended with exit code 0 [2021-08-21 18:59:24,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-08-21 18:59:24,545 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:59:24,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:59:24,545 INFO L82 PathProgramCache]: Analyzing trace with hash 787703321, now seen corresponding path program 117 times [2021-08-21 18:59:24,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:59:24,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627406826] [2021-08-21 18:59:24,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:59:24,545 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:59:24,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:24,643 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:59:24,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:59:24,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627406826] [2021-08-21 18:59:24,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627406826] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:24,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325980049] [2021-08-21 18:59:24,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:59:24,643 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:24,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:59:24,661 INFO L229 MonitoredProcess]: Starting monitored process 221 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:59:24,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2021-08-21 18:59:28,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:59:28,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:59:28,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 18:59:28,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:59:29,067 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:59:29,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325980049] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:29,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:59:29,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 18:59:29,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88081578] [2021-08-21 18:59:29,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 18:59:29,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:59:29,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 18:59:29,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:59:29,068 INFO L87 Difference]: Start difference. First operand 4789 states and 10220 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:29,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:59:29,155 INFO L93 Difference]: Finished difference Result 5098 states and 10629 transitions. [2021-08-21 18:59:29,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 18:59:29,155 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:59:29,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:59:29,161 INFO L225 Difference]: With dead ends: 5098 [2021-08-21 18:59:29,161 INFO L226 Difference]: Without dead ends: 5093 [2021-08-21 18:59:29,161 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.6ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:59:29,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5093 states. [2021-08-21 18:59:29,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5093 to 4641. [2021-08-21 18:59:29,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4641 states, 4640 states have (on average 2.13125) internal successors, (9889), 4640 states have internal predecessors, (9889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:29,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4641 states to 4641 states and 9889 transitions. [2021-08-21 18:59:29,205 INFO L78 Accepts]: Start accepts. Automaton has 4641 states and 9889 transitions. Word has length 32 [2021-08-21 18:59:29,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:59:29,205 INFO L470 AbstractCegarLoop]: Abstraction has 4641 states and 9889 transitions. [2021-08-21 18:59:29,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:29,205 INFO L276 IsEmpty]: Start isEmpty. Operand 4641 states and 9889 transitions. [2021-08-21 18:59:29,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:59:29,210 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:59:29,210 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:59:29,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Forceful destruction successful, exit code 0 [2021-08-21 18:59:29,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 221 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-08-21 18:59:29,433 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:59:29,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:59:29,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1060200611, now seen corresponding path program 118 times [2021-08-21 18:59:29,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:59:29,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398797046] [2021-08-21 18:59:29,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:59:29,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:59:29,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:29,530 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:59:29,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:59:29,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398797046] [2021-08-21 18:59:29,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398797046] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:29,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552189793] [2021-08-21 18:59:29,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:59:29,531 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:29,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:59:29,531 INFO L229 MonitoredProcess]: Starting monitored process 222 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:59:29,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Waiting until timeout for monitored process [2021-08-21 18:59:33,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:59:33,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:59:33,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 18:59:33,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:59:33,723 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:59:33,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552189793] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:33,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:59:33,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 18:59:33,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814993835] [2021-08-21 18:59:33,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 18:59:33,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:59:33,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 18:59:33,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:59:33,724 INFO L87 Difference]: Start difference. First operand 4641 states and 9889 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:33,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:59:33,807 INFO L93 Difference]: Finished difference Result 5108 states and 10672 transitions. [2021-08-21 18:59:33,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 18:59:33,807 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:59:33,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:59:33,813 INFO L225 Difference]: With dead ends: 5108 [2021-08-21 18:59:33,813 INFO L226 Difference]: Without dead ends: 5099 [2021-08-21 18:59:33,813 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.7ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:59:33,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5099 states. [2021-08-21 18:59:33,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5099 to 4605. [2021-08-21 18:59:33,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4605 states, 4604 states have (on average 2.1266290182450045) internal successors, (9791), 4604 states have internal predecessors, (9791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:33,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4605 states to 4605 states and 9791 transitions. [2021-08-21 18:59:33,855 INFO L78 Accepts]: Start accepts. Automaton has 4605 states and 9791 transitions. Word has length 32 [2021-08-21 18:59:33,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:59:33,855 INFO L470 AbstractCegarLoop]: Abstraction has 4605 states and 9791 transitions. [2021-08-21 18:59:33,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:33,855 INFO L276 IsEmpty]: Start isEmpty. Operand 4605 states and 9791 transitions. [2021-08-21 18:59:33,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:59:33,860 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:59:33,860 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:59:33,887 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Ended with exit code 0 [2021-08-21 18:59:34,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,222 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:34,076 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:59:34,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:59:34,076 INFO L82 PathProgramCache]: Analyzing trace with hash -549273891, now seen corresponding path program 119 times [2021-08-21 18:59:34,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:59:34,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931912701] [2021-08-21 18:59:34,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:59:34,077 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:59:34,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:34,169 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:59:34,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:59:34,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931912701] [2021-08-21 18:59:34,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931912701] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:34,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499692321] [2021-08-21 18:59:34,169 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:59:34,169 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:34,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:59:34,170 INFO L229 MonitoredProcess]: Starting monitored process 223 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:59:34,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2021-08-21 18:59:38,477 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:59:38,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:59:38,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 18:59:38,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:59:38,628 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:59:38,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499692321] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:38,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:59:38,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 18:59:38,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182589280] [2021-08-21 18:59:38,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 18:59:38,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:59:38,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 18:59:38,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:59:38,629 INFO L87 Difference]: Start difference. First operand 4605 states and 9791 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:38,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:59:38,731 INFO L93 Difference]: Finished difference Result 4973 states and 10349 transitions. [2021-08-21 18:59:38,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 18:59:38,731 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:59:38,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:59:38,737 INFO L225 Difference]: With dead ends: 4973 [2021-08-21 18:59:38,737 INFO L226 Difference]: Without dead ends: 4940 [2021-08-21 18:59:38,737 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.8ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:59:38,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4940 states. [2021-08-21 18:59:38,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4940 to 4603. [2021-08-21 18:59:38,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4603 states, 4602 states have (on average 2.1236418948283355) internal successors, (9773), 4602 states have internal predecessors, (9773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:38,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4603 states to 4603 states and 9773 transitions. [2021-08-21 18:59:38,780 INFO L78 Accepts]: Start accepts. Automaton has 4603 states and 9773 transitions. Word has length 32 [2021-08-21 18:59:38,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:59:38,780 INFO L470 AbstractCegarLoop]: Abstraction has 4603 states and 9773 transitions. [2021-08-21 18:59:38,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:38,780 INFO L276 IsEmpty]: Start isEmpty. Operand 4603 states and 9773 transitions. [2021-08-21 18:59:38,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:59:38,785 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:59:38,786 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:59:38,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Forceful destruction successful, exit code 0 [2021-08-21 18:59:39,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2021-08-21 18:59:39,001 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:59:39,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:59:39,001 INFO L82 PathProgramCache]: Analyzing trace with hash -658243439, now seen corresponding path program 120 times [2021-08-21 18:59:39,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:59:39,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856015082] [2021-08-21 18:59:39,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:59:39,001 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:59:39,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:39,148 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:59:39,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:59:39,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856015082] [2021-08-21 18:59:39,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856015082] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:39,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651012695] [2021-08-21 18:59:39,148 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:59:39,148 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:39,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:59:39,164 INFO L229 MonitoredProcess]: Starting monitored process 224 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:59:39,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process [2021-08-21 18:59:43,371 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:59:43,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:59:43,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 18:59:43,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:59:43,530 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:59:43,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651012695] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:43,530 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:59:43,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 18:59:43,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664444435] [2021-08-21 18:59:43,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 18:59:43,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:59:43,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 18:59:43,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:59:43,531 INFO L87 Difference]: Start difference. First operand 4603 states and 9773 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:43,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:59:43,626 INFO L93 Difference]: Finished difference Result 4992 states and 10355 transitions. [2021-08-21 18:59:43,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 18:59:43,626 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:59:43,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:59:43,632 INFO L225 Difference]: With dead ends: 4992 [2021-08-21 18:59:43,632 INFO L226 Difference]: Without dead ends: 4983 [2021-08-21 18:59:43,632 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 58.9ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:59:43,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4983 states. [2021-08-21 18:59:43,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4983 to 4668. [2021-08-21 18:59:43,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4668 states, 4667 states have (on average 2.1157060209985) internal successors, (9874), 4667 states have internal predecessors, (9874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:43,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4668 states to 4668 states and 9874 transitions. [2021-08-21 18:59:43,677 INFO L78 Accepts]: Start accepts. Automaton has 4668 states and 9874 transitions. Word has length 32 [2021-08-21 18:59:43,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:59:43,677 INFO L470 AbstractCegarLoop]: Abstraction has 4668 states and 9874 transitions. [2021-08-21 18:59:43,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:43,677 INFO L276 IsEmpty]: Start isEmpty. Operand 4668 states and 9874 transitions. [2021-08-21 18:59:43,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:59:43,682 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:59:43,682 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:59:43,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Forceful destruction successful, exit code 0 [2021-08-21 18:59:43,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-08-21 18:59:43,893 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:59:43,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:59:43,893 INFO L82 PathProgramCache]: Analyzing trace with hash 2061257677, now seen corresponding path program 121 times [2021-08-21 18:59:43,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:59:43,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687782029] [2021-08-21 18:59:43,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:59:43,893 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:59:43,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:43,997 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:59:43,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:59:43,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687782029] [2021-08-21 18:59:43,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687782029] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:43,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946122480] [2021-08-21 18:59:43,998 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:59:43,998 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:43,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:59:43,999 INFO L229 MonitoredProcess]: Starting monitored process 225 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:59:43,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Waiting until timeout for monitored process [2021-08-21 18:59:48,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:48,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 18:59:48,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:59:48,281 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:59:48,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946122480] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:48,281 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:59:48,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 18:59:48,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748131586] [2021-08-21 18:59:48,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 18:59:48,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:59:48,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 18:59:48,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:59:48,282 INFO L87 Difference]: Start difference. First operand 4668 states and 9874 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:48,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:59:48,380 INFO L93 Difference]: Finished difference Result 5093 states and 10487 transitions. [2021-08-21 18:59:48,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 18:59:48,380 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:59:48,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:59:48,386 INFO L225 Difference]: With dead ends: 5093 [2021-08-21 18:59:48,386 INFO L226 Difference]: Without dead ends: 5088 [2021-08-21 18:59:48,386 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.1ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:59:48,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5088 states. [2021-08-21 18:59:48,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5088 to 4776. [2021-08-21 18:59:48,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4776 states, 4775 states have (on average 2.116020942408377) internal successors, (10104), 4775 states have internal predecessors, (10104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:48,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4776 states to 4776 states and 10104 transitions. [2021-08-21 18:59:48,430 INFO L78 Accepts]: Start accepts. Automaton has 4776 states and 10104 transitions. Word has length 32 [2021-08-21 18:59:48,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:59:48,430 INFO L470 AbstractCegarLoop]: Abstraction has 4776 states and 10104 transitions. [2021-08-21 18:59:48,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:48,430 INFO L276 IsEmpty]: Start isEmpty. Operand 4776 states and 10104 transitions. [2021-08-21 18:59:48,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:59:48,435 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:59:48,435 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:59:48,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Forceful destruction successful, exit code 0 [2021-08-21 18:59:48,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,225 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:48,661 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:59:48,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:59:48,661 INFO L82 PathProgramCache]: Analyzing trace with hash 94425109, now seen corresponding path program 122 times [2021-08-21 18:59:48,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:59:48,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259070446] [2021-08-21 18:59:48,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:59:48,661 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:59:48,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:48,798 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:59:48,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:59:48,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259070446] [2021-08-21 18:59:48,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259070446] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:48,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7883143] [2021-08-21 18:59:48,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:59:48,799 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:48,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:59:48,800 INFO L229 MonitoredProcess]: Starting monitored process 226 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:59:48,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Waiting until timeout for monitored process [2021-08-21 18:59:53,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:59:53,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:59:53,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 18:59:53,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:59:53,331 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:59:53,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7883143] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:53,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:59:53,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 18:59:53,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518753102] [2021-08-21 18:59:53,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 18:59:53,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:59:53,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 18:59:53,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:59:53,332 INFO L87 Difference]: Start difference. First operand 4776 states and 10104 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:53,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:59:53,434 INFO L93 Difference]: Finished difference Result 5123 states and 10577 transitions. [2021-08-21 18:59:53,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 18:59:53,434 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:59:53,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:59:53,440 INFO L225 Difference]: With dead ends: 5123 [2021-08-21 18:59:53,440 INFO L226 Difference]: Without dead ends: 5114 [2021-08-21 18:59:53,440 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:59:53,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5114 states. [2021-08-21 18:59:53,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5114 to 4786. [2021-08-21 18:59:53,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4786 states, 4785 states have (on average 2.111598746081505) internal successors, (10104), 4785 states have internal predecessors, (10104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:53,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4786 states to 4786 states and 10104 transitions. [2021-08-21 18:59:53,517 INFO L78 Accepts]: Start accepts. Automaton has 4786 states and 10104 transitions. Word has length 32 [2021-08-21 18:59:53,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:59:53,517 INFO L470 AbstractCegarLoop]: Abstraction has 4786 states and 10104 transitions. [2021-08-21 18:59:53,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:53,517 INFO L276 IsEmpty]: Start isEmpty. Operand 4786 states and 10104 transitions. [2021-08-21 18:59:53,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:59:53,522 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:59:53,522 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:59:53,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Ended with exit code 0 [2021-08-21 18:59:53,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,226 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:53,749 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:59:53,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:59:53,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1481041071, now seen corresponding path program 123 times [2021-08-21 18:59:53,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:59:53,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945277920] [2021-08-21 18:59:53,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:59:53,750 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:59:53,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:53,847 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:59:53,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:59:53,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945277920] [2021-08-21 18:59:53,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945277920] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:53,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618270007] [2021-08-21 18:59:53,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:59:53,848 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:53,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:59:53,849 INFO L229 MonitoredProcess]: Starting monitored process 227 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:59:53,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Waiting until timeout for monitored process [2021-08-21 18:59:58,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:59:58,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:59:58,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 18:59:58,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:59:58,342 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:59:58,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618270007] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:58,342 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:59:58,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 18:59:58,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347372016] [2021-08-21 18:59:58,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 18:59:58,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:59:58,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 18:59:58,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:59:58,343 INFO L87 Difference]: Start difference. First operand 4786 states and 10104 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:58,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:59:58,461 INFO L93 Difference]: Finished difference Result 5168 states and 10616 transitions. [2021-08-21 18:59:58,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 18:59:58,461 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:59:58,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:59:58,467 INFO L225 Difference]: With dead ends: 5168 [2021-08-21 18:59:58,467 INFO L226 Difference]: Without dead ends: 5163 [2021-08-21 18:59:58,467 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.0ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:59:58,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5163 states. [2021-08-21 18:59:58,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5163 to 4858. [2021-08-21 18:59:58,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4858 states, 4857 states have (on average 2.1144739551163267) internal successors, (10270), 4857 states have internal predecessors, (10270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:58,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4858 states to 4858 states and 10270 transitions. [2021-08-21 18:59:58,517 INFO L78 Accepts]: Start accepts. Automaton has 4858 states and 10270 transitions. Word has length 32 [2021-08-21 18:59:58,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:59:58,517 INFO L470 AbstractCegarLoop]: Abstraction has 4858 states and 10270 transitions. [2021-08-21 18:59:58,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:58,517 INFO L276 IsEmpty]: Start isEmpty. Operand 4858 states and 10270 transitions. [2021-08-21 18:59:58,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:59:58,522 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:59:58,522 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:59:58,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Forceful destruction successful, exit code 0 [2021-08-21 18:59:58,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,227 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:58,739 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:59:58,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:59:58,740 INFO L82 PathProgramCache]: Analyzing trace with hash 385797521, now seen corresponding path program 124 times [2021-08-21 18:59:58,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:59:58,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722132920] [2021-08-21 18:59:58,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:59:58,740 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:59:58,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:58,837 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:59:58,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:59:58,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722132920] [2021-08-21 18:59:58,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722132920] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:58,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656649573] [2021-08-21 18:59:58,837 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:59:58,837 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:58,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:59:58,838 INFO L229 MonitoredProcess]: Starting monitored process 228 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:59:58,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Waiting until timeout for monitored process [2021-08-21 19:00:03,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 19:00:03,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:00:03,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 19:00:03,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:00:03,682 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:00:03,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656649573] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:03,683 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:00:03,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 19:00:03,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351432871] [2021-08-21 19:00:03,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 19:00:03,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:00:03,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 19:00:03,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:00:03,683 INFO L87 Difference]: Start difference. First operand 4858 states and 10270 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:03,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:00:03,787 INFO L93 Difference]: Finished difference Result 5246 states and 10753 transitions. [2021-08-21 19:00:03,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:00:03,787 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:00:03,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:00:03,794 INFO L225 Difference]: With dead ends: 5246 [2021-08-21 19:00:03,794 INFO L226 Difference]: Without dead ends: 5241 [2021-08-21 19:00:03,794 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.7ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:00:03,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5241 states. [2021-08-21 19:00:03,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5241 to 4874. [2021-08-21 19:00:03,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4874 states, 4873 states have (on average 2.113687666735071) internal successors, (10300), 4873 states have internal predecessors, (10300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:03,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4874 states to 4874 states and 10300 transitions. [2021-08-21 19:00:03,846 INFO L78 Accepts]: Start accepts. Automaton has 4874 states and 10300 transitions. Word has length 32 [2021-08-21 19:00:03,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:00:03,846 INFO L470 AbstractCegarLoop]: Abstraction has 4874 states and 10300 transitions. [2021-08-21 19:00:03,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:03,846 INFO L276 IsEmpty]: Start isEmpty. Operand 4874 states and 10300 transitions. [2021-08-21 19:00:03,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:00:03,851 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:00:03,851 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:00:03,882 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Ended with exit code 0 [2021-08-21 19:00:04,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,228 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:04,069 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 19:00:04,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:00:04,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1462106411, now seen corresponding path program 125 times [2021-08-21 19:00:04,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:00:04,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599325458] [2021-08-21 19:00:04,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:00:04,069 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:00:04,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:00:04,223 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:00:04,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:00:04,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599325458] [2021-08-21 19:00:04,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599325458] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:04,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634801583] [2021-08-21 19:00:04,223 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 19:00:04,223 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:04,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:00:04,224 INFO L229 MonitoredProcess]: Starting monitored process 229 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:00:04,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Waiting until timeout for monitored process [2021-08-21 19:00:09,065 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:00:09,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:00:09,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 19:00:09,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:00:09,220 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:00:09,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634801583] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:09,221 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:00:09,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 19:00:09,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027907507] [2021-08-21 19:00:09,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 19:00:09,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:00:09,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 19:00:09,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:00:09,221 INFO L87 Difference]: Start difference. First operand 4874 states and 10300 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:09,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:00:09,325 INFO L93 Difference]: Finished difference Result 5371 states and 11088 transitions. [2021-08-21 19:00:09,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:00:09,325 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:00:09,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:00:09,332 INFO L225 Difference]: With dead ends: 5371 [2021-08-21 19:00:09,332 INFO L226 Difference]: Without dead ends: 5362 [2021-08-21 19:00:09,332 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.9ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:00:09,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5362 states. [2021-08-21 19:00:09,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5362 to 5018. [2021-08-21 19:00:09,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5018 states, 5017 states have (on average 2.1110225234203708) internal successors, (10591), 5017 states have internal predecessors, (10591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:09,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5018 states to 5018 states and 10591 transitions. [2021-08-21 19:00:09,384 INFO L78 Accepts]: Start accepts. Automaton has 5018 states and 10591 transitions. Word has length 32 [2021-08-21 19:00:09,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:00:09,384 INFO L470 AbstractCegarLoop]: Abstraction has 5018 states and 10591 transitions. [2021-08-21 19:00:09,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:09,384 INFO L276 IsEmpty]: Start isEmpty. Operand 5018 states and 10591 transitions. [2021-08-21 19:00:09,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:00:09,391 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:00:09,391 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:00:09,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Forceful destruction successful, exit code 0 [2021-08-21 19:00:09,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243,229 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:09,613 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 19:00:09,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:00:09,613 INFO L82 PathProgramCache]: Analyzing trace with hash -736546931, now seen corresponding path program 126 times [2021-08-21 19:00:09,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:00:09,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448609937] [2021-08-21 19:00:09,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:00:09,613 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:00:09,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:00:09,782 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:00:09,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:00:09,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448609937] [2021-08-21 19:00:09,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448609937] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:09,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801886120] [2021-08-21 19:00:09,782 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 19:00:09,782 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:09,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:00:09,783 INFO L229 MonitoredProcess]: Starting monitored process 230 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:00:09,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Waiting until timeout for monitored process [2021-08-21 19:00:14,354 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 19:00:14,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:00:14,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 19:00:14,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:00:14,510 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:00:14,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801886120] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:14,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:00:14,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 19:00:14,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362758183] [2021-08-21 19:00:14,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 19:00:14,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:00:14,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 19:00:14,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:00:14,511 INFO L87 Difference]: Start difference. First operand 5018 states and 10591 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:14,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:00:14,623 INFO L93 Difference]: Finished difference Result 5381 states and 11044 transitions. [2021-08-21 19:00:14,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:00:14,624 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:00:14,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:00:14,631 INFO L225 Difference]: With dead ends: 5381 [2021-08-21 19:00:14,631 INFO L226 Difference]: Without dead ends: 5376 [2021-08-21 19:00:14,631 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.3ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:00:14,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5376 states. [2021-08-21 19:00:14,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5376 to 5037. [2021-08-21 19:00:14,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5037 states, 5036 states have (on average 2.1110007942811757) internal successors, (10631), 5036 states have internal predecessors, (10631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:14,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5037 states to 5037 states and 10631 transitions. [2021-08-21 19:00:14,685 INFO L78 Accepts]: Start accepts. Automaton has 5037 states and 10631 transitions. Word has length 32 [2021-08-21 19:00:14,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:00:14,685 INFO L470 AbstractCegarLoop]: Abstraction has 5037 states and 10631 transitions. [2021-08-21 19:00:14,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:14,685 INFO L276 IsEmpty]: Start isEmpty. Operand 5037 states and 10631 transitions. [2021-08-21 19:00:14,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:00:14,691 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:00:14,691 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:00:14,723 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Ended with exit code 0 [2021-08-21 19:00:14,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244,230 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:14,907 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 19:00:14,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:00:14,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1710516433, now seen corresponding path program 127 times [2021-08-21 19:00:14,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:00:14,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718751588] [2021-08-21 19:00:14,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:00:14,907 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:00:14,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:00:15,069 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:00:15,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:00:15,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718751588] [2021-08-21 19:00:15,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718751588] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:15,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816890063] [2021-08-21 19:00:15,070 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 19:00:15,070 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:15,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:00:15,070 INFO L229 MonitoredProcess]: Starting monitored process 231 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:00:15,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Waiting until timeout for monitored process [2021-08-21 19:00:19,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:00:19,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 19:00:19,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:00:19,962 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:00:19,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816890063] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:19,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:00:19,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 19:00:19,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474226373] [2021-08-21 19:00:19,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 19:00:19,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:00:19,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 19:00:19,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:00:19,965 INFO L87 Difference]: Start difference. First operand 5037 states and 10631 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:20,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:00:20,100 INFO L93 Difference]: Finished difference Result 5427 states and 11206 transitions. [2021-08-21 19:00:20,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:00:20,101 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:00:20,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:00:20,110 INFO L225 Difference]: With dead ends: 5427 [2021-08-21 19:00:20,111 INFO L226 Difference]: Without dead ends: 5418 [2021-08-21 19:00:20,111 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.4ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:00:20,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5418 states. [2021-08-21 19:00:20,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5418 to 5097. [2021-08-21 19:00:20,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5097 states, 5096 states have (on average 2.111656200941915) internal successors, (10761), 5096 states have internal predecessors, (10761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:20,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5097 states to 5097 states and 10761 transitions. [2021-08-21 19:00:20,163 INFO L78 Accepts]: Start accepts. Automaton has 5097 states and 10761 transitions. Word has length 32 [2021-08-21 19:00:20,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:00:20,163 INFO L470 AbstractCegarLoop]: Abstraction has 5097 states and 10761 transitions. [2021-08-21 19:00:20,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:20,164 INFO L276 IsEmpty]: Start isEmpty. Operand 5097 states and 10761 transitions. [2021-08-21 19:00:20,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:00:20,169 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:00:20,169 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:00:20,200 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Ended with exit code 0 [2021-08-21 19:00:20,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-08-21 19:00:20,373 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 19:00:20,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:00:20,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1198952243, now seen corresponding path program 128 times [2021-08-21 19:00:20,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:00:20,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244896366] [2021-08-21 19:00:20,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:00:20,374 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:00:20,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:00:20,559 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:00:20,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:00:20,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244896366] [2021-08-21 19:00:20,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244896366] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:20,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977649779] [2021-08-21 19:00:20,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:00:20,560 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:20,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:00:20,561 INFO L229 MonitoredProcess]: Starting monitored process 232 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:00:20,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Waiting until timeout for monitored process [2021-08-21 19:00:24,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:00:24,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:00:24,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 19:00:24,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:00:25,169 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:00:25,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977649779] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:25,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:00:25,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 19:00:25,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855291686] [2021-08-21 19:00:25,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 19:00:25,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:00:25,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 19:00:25,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:00:25,171 INFO L87 Difference]: Start difference. First operand 5097 states and 10761 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:25,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:00:25,275 INFO L93 Difference]: Finished difference Result 5448 states and 11251 transitions. [2021-08-21 19:00:25,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:00:25,276 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:00:25,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:00:25,284 INFO L225 Difference]: With dead ends: 5448 [2021-08-21 19:00:25,284 INFO L226 Difference]: Without dead ends: 5443 [2021-08-21 19:00:25,284 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 115.3ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:00:25,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5443 states. [2021-08-21 19:00:25,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5443 to 5133. [2021-08-21 19:00:25,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5133 states, 5132 states have (on average 2.1106780982073268) internal successors, (10832), 5132 states have internal predecessors, (10832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:25,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5133 states to 5133 states and 10832 transitions. [2021-08-21 19:00:25,343 INFO L78 Accepts]: Start accepts. Automaton has 5133 states and 10832 transitions. Word has length 32 [2021-08-21 19:00:25,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:00:25,343 INFO L470 AbstractCegarLoop]: Abstraction has 5133 states and 10832 transitions. [2021-08-21 19:00:25,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:25,343 INFO L276 IsEmpty]: Start isEmpty. Operand 5133 states and 10832 transitions. [2021-08-21 19:00:25,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:00:25,349 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:00:25,350 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:00:25,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Forceful destruction successful, exit code 0 [2021-08-21 19:00:25,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-08-21 19:00:25,569 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 19:00:25,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:00:25,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1498733737, now seen corresponding path program 129 times [2021-08-21 19:00:25,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:00:25,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419035947] [2021-08-21 19:00:25,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:00:25,569 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:00:25,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:00:25,668 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 19:00:25,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:00:25,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419035947] [2021-08-21 19:00:25,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419035947] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:25,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609094568] [2021-08-21 19:00:25,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 19:00:25,669 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:25,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:00:25,669 INFO L229 MonitoredProcess]: Starting monitored process 233 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:00:25,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Waiting until timeout for monitored process [2021-08-21 19:00:30,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 19:00:30,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:00:30,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 19:00:30,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:00:30,292 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 19:00:30,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609094568] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:30,293 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:00:30,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 19:00:30,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044036803] [2021-08-21 19:00:30,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 19:00:30,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:00:30,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 19:00:30,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:00:30,293 INFO L87 Difference]: Start difference. First operand 5133 states and 10832 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:30,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:00:30,383 INFO L93 Difference]: Finished difference Result 5580 states and 11515 transitions. [2021-08-21 19:00:30,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:00:30,383 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:00:30,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:00:30,390 INFO L225 Difference]: With dead ends: 5580 [2021-08-21 19:00:30,390 INFO L226 Difference]: Without dead ends: 5571 [2021-08-21 19:00:30,390 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.3ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:00:30,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5571 states. [2021-08-21 19:00:30,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5571 to 5081. [2021-08-21 19:00:30,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5081 states, 5080 states have (on average 2.112007874015748) internal successors, (10729), 5080 states have internal predecessors, (10729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:30,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5081 states to 5081 states and 10729 transitions. [2021-08-21 19:00:30,449 INFO L78 Accepts]: Start accepts. Automaton has 5081 states and 10729 transitions. Word has length 32 [2021-08-21 19:00:30,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:00:30,449 INFO L470 AbstractCegarLoop]: Abstraction has 5081 states and 10729 transitions. [2021-08-21 19:00:30,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:30,449 INFO L276 IsEmpty]: Start isEmpty. Operand 5081 states and 10729 transitions. [2021-08-21 19:00:30,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:00:30,457 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:00:30,457 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:00:30,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Forceful destruction successful, exit code 0 [2021-08-21 19:00:30,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2021-08-21 19:00:30,685 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 19:00:30,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:00:30,685 INFO L82 PathProgramCache]: Analyzing trace with hash -76732443, now seen corresponding path program 130 times [2021-08-21 19:00:30,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:00:30,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975342435] [2021-08-21 19:00:30,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:00:30,685 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:00:30,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:00:30,852 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:00:30,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:00:30,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975342435] [2021-08-21 19:00:30,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975342435] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:30,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11034659] [2021-08-21 19:00:30,853 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 19:00:30,853 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:30,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:00:30,854 INFO L229 MonitoredProcess]: Starting monitored process 234 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:00:30,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Waiting until timeout for monitored process [2021-08-21 19:00:35,388 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 19:00:35,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:00:35,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 19:00:35,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:00:35,566 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:00:35,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11034659] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:35,566 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:00:35,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 19:00:35,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906050023] [2021-08-21 19:00:35,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 19:00:35,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:00:35,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 19:00:35,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:00:35,568 INFO L87 Difference]: Start difference. First operand 5081 states and 10729 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:35,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:00:35,682 INFO L93 Difference]: Finished difference Result 5530 states and 11386 transitions. [2021-08-21 19:00:35,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:00:35,682 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:00:35,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:00:35,691 INFO L225 Difference]: With dead ends: 5530 [2021-08-21 19:00:35,691 INFO L226 Difference]: Without dead ends: 5525 [2021-08-21 19:00:35,692 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.8ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:00:35,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5525 states. [2021-08-21 19:00:35,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5525 to 5092. [2021-08-21 19:00:35,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5092 states, 5091 states have (on average 2.11333726183461) internal successors, (10759), 5091 states have internal predecessors, (10759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:35,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5092 states to 5092 states and 10759 transitions. [2021-08-21 19:00:35,756 INFO L78 Accepts]: Start accepts. Automaton has 5092 states and 10759 transitions. Word has length 32 [2021-08-21 19:00:35,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:00:35,756 INFO L470 AbstractCegarLoop]: Abstraction has 5092 states and 10759 transitions. [2021-08-21 19:00:35,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:35,756 INFO L276 IsEmpty]: Start isEmpty. Operand 5092 states and 10759 transitions. [2021-08-21 19:00:35,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:00:35,762 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:00:35,762 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:00:35,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Forceful destruction successful, exit code 0 [2021-08-21 19:00:35,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,234 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:35,976 INFO L402 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 19:00:35,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:00:35,977 INFO L82 PathProgramCache]: Analyzing trace with hash 280012213, now seen corresponding path program 131 times [2021-08-21 19:00:35,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:00:35,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556484854] [2021-08-21 19:00:35,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:00:35,977 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:00:36,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:00:36,127 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 19:00:36,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:00:36,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556484854] [2021-08-21 19:00:36,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556484854] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:36,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501631280] [2021-08-21 19:00:36,127 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 19:00:36,127 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:36,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:00:36,129 INFO L229 MonitoredProcess]: Starting monitored process 235 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:00:36,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Waiting until timeout for monitored process [2021-08-21 19:00:40,967 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 19:00:40,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:00:40,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 19:00:40,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:00:41,117 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 19:00:41,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501631280] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:41,117 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:00:41,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 19:00:41,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925127431] [2021-08-21 19:00:41,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 19:00:41,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:00:41,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 19:00:41,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:00:41,118 INFO L87 Difference]: Start difference. First operand 5092 states and 10759 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:41,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:00:41,215 INFO L93 Difference]: Finished difference Result 5465 states and 11304 transitions. [2021-08-21 19:00:41,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:00:41,216 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:00:41,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:00:41,223 INFO L225 Difference]: With dead ends: 5465 [2021-08-21 19:00:41,223 INFO L226 Difference]: Without dead ends: 5456 [2021-08-21 19:00:41,223 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.2ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:00:41,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5456 states. [2021-08-21 19:00:41,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5456 to 5077. [2021-08-21 19:00:41,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5077 states, 5076 states have (on average 2.1117021276595747) internal successors, (10719), 5076 states have internal predecessors, (10719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:41,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5077 states to 5077 states and 10719 transitions. [2021-08-21 19:00:41,277 INFO L78 Accepts]: Start accepts. Automaton has 5077 states and 10719 transitions. Word has length 32 [2021-08-21 19:00:41,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:00:41,277 INFO L470 AbstractCegarLoop]: Abstraction has 5077 states and 10719 transitions. [2021-08-21 19:00:41,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:41,277 INFO L276 IsEmpty]: Start isEmpty. Operand 5077 states and 10719 transitions. [2021-08-21 19:00:41,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:00:41,283 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:00:41,283 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:00:41,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Forceful destruction successful, exit code 0 [2021-08-21 19:00:41,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-08-21 19:00:41,508 INFO L402 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 19:00:41,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:00:41,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1295453967, now seen corresponding path program 132 times [2021-08-21 19:00:41,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:00:41,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054941478] [2021-08-21 19:00:41,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:00:41,509 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:00:41,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:00:41,607 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:00:41,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:00:41,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054941478] [2021-08-21 19:00:41,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054941478] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:41,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345102536] [2021-08-21 19:00:41,607 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 19:00:41,607 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:41,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:00:41,608 INFO L229 MonitoredProcess]: Starting monitored process 236 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:00:41,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Waiting until timeout for monitored process [2021-08-21 19:00:46,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 19:00:46,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:00:46,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 19:00:46,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:00:46,481 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:00:46,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345102536] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:46,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:00:46,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 19:00:46,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309781116] [2021-08-21 19:00:46,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 19:00:46,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:00:46,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 19:00:46,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:00:46,482 INFO L87 Difference]: Start difference. First operand 5077 states and 10719 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:46,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:00:46,583 INFO L93 Difference]: Finished difference Result 5455 states and 11255 transitions. [2021-08-21 19:00:46,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:00:46,584 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:00:46,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:00:46,590 INFO L225 Difference]: With dead ends: 5455 [2021-08-21 19:00:46,591 INFO L226 Difference]: Without dead ends: 5450 [2021-08-21 19:00:46,591 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.2ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:00:46,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5450 states. [2021-08-21 19:00:46,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5450 to 5101. [2021-08-21 19:00:46,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5101 states, 5100 states have (on average 2.111764705882353) internal successors, (10770), 5100 states have internal predecessors, (10770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:46,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5101 states to 5101 states and 10770 transitions. [2021-08-21 19:00:46,646 INFO L78 Accepts]: Start accepts. Automaton has 5101 states and 10770 transitions. Word has length 32 [2021-08-21 19:00:46,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:00:46,646 INFO L470 AbstractCegarLoop]: Abstraction has 5101 states and 10770 transitions. [2021-08-21 19:00:46,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:46,646 INFO L276 IsEmpty]: Start isEmpty. Operand 5101 states and 10770 transitions. [2021-08-21 19:00:46,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:00:46,653 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:00:46,653 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:00:46,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Forceful destruction successful, exit code 0 [2021-08-21 19:00:46,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,236 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:46,876 INFO L402 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 19:00:46,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:00:46,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1006368091, now seen corresponding path program 133 times [2021-08-21 19:00:46,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:00:46,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109276202] [2021-08-21 19:00:46,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:00:46,876 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:00:46,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:00:47,032 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:00:47,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:00:47,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109276202] [2021-08-21 19:00:47,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109276202] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:47,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69277851] [2021-08-21 19:00:47,032 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 19:00:47,032 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:47,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:00:47,033 INFO L229 MonitoredProcess]: Starting monitored process 237 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:00:47,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Waiting until timeout for monitored process [2021-08-21 19:00:51,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:00:51,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 19:00:51,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:00:52,046 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:00:52,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69277851] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:52,046 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:00:52,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 19:00:52,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141581624] [2021-08-21 19:00:52,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 19:00:52,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:00:52,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 19:00:52,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:00:52,047 INFO L87 Difference]: Start difference. First operand 5101 states and 10770 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:52,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:00:52,149 INFO L93 Difference]: Finished difference Result 5515 states and 11348 transitions. [2021-08-21 19:00:52,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:00:52,149 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:00:52,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:00:52,157 INFO L225 Difference]: With dead ends: 5515 [2021-08-21 19:00:52,157 INFO L226 Difference]: Without dead ends: 5510 [2021-08-21 19:00:52,157 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.5ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:00:52,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5510 states. [2021-08-21 19:00:52,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5510 to 5095. [2021-08-21 19:00:52,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5095 states, 5094 states have (on average 2.1117000392618768) internal successors, (10757), 5094 states have internal predecessors, (10757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:52,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5095 states to 5095 states and 10757 transitions. [2021-08-21 19:00:52,216 INFO L78 Accepts]: Start accepts. Automaton has 5095 states and 10757 transitions. Word has length 32 [2021-08-21 19:00:52,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:00:52,216 INFO L470 AbstractCegarLoop]: Abstraction has 5095 states and 10757 transitions. [2021-08-21 19:00:52,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:52,216 INFO L276 IsEmpty]: Start isEmpty. Operand 5095 states and 10757 transitions. [2021-08-21 19:00:52,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:00:52,222 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:00:52,223 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:00:52,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Forceful destruction successful, exit code 0 [2021-08-21 19:00:52,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,237 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:52,441 INFO L402 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 19:00:52,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:00:52,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1440695273, now seen corresponding path program 25 times [2021-08-21 19:00:52,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:00:52,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494642263] [2021-08-21 19:00:52,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:00:52,441 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:00:52,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:00:52,647 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:00:52,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:00:52,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494642263] [2021-08-21 19:00:52,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494642263] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:52,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181401292] [2021-08-21 19:00:52,648 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 19:00:52,648 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:52,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:00:52,649 INFO L229 MonitoredProcess]: Starting monitored process 238 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:00:52,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Waiting until timeout for monitored process [2021-08-21 19:00:57,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:00:57,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 19:00:57,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:00:57,584 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:00:57,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181401292] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:57,584 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:00:57,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 19:00:57,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635394489] [2021-08-21 19:00:57,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 19:00:57,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:00:57,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 19:00:57,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:00:57,585 INFO L87 Difference]: Start difference. First operand 5095 states and 10757 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:57,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:00:57,678 INFO L93 Difference]: Finished difference Result 5579 states and 11546 transitions. [2021-08-21 19:00:57,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:00:57,678 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:00:57,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:00:57,685 INFO L225 Difference]: With dead ends: 5579 [2021-08-21 19:00:57,685 INFO L226 Difference]: Without dead ends: 5570 [2021-08-21 19:00:57,685 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 145.6ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:00:57,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5570 states. [2021-08-21 19:00:57,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5570 to 5168. [2021-08-21 19:00:57,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5168 states, 5167 states have (on average 2.11186375072576) internal successors, (10912), 5167 states have internal predecessors, (10912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:57,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5168 states to 5168 states and 10912 transitions. [2021-08-21 19:00:57,736 INFO L78 Accepts]: Start accepts. Automaton has 5168 states and 10912 transitions. Word has length 32 [2021-08-21 19:00:57,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:00:57,736 INFO L470 AbstractCegarLoop]: Abstraction has 5168 states and 10912 transitions. [2021-08-21 19:00:57,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:57,736 INFO L276 IsEmpty]: Start isEmpty. Operand 5168 states and 10912 transitions. [2021-08-21 19:00:57,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:00:57,742 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:00:57,742 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:00:57,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Forceful destruction successful, exit code 0 [2021-08-21 19:00:57,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,238 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:57,956 INFO L402 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 19:00:57,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:00:57,957 INFO L82 PathProgramCache]: Analyzing trace with hash 390270437, now seen corresponding path program 134 times [2021-08-21 19:00:57,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:00:57,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899244126] [2021-08-21 19:00:57,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:00:57,957 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:00:57,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:00:58,053 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 19:00:58,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:00:58,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899244126] [2021-08-21 19:00:58,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899244126] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:58,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981430654] [2021-08-21 19:00:58,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:00:58,053 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:58,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:00:58,054 INFO L229 MonitoredProcess]: Starting monitored process 239 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:00:58,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Waiting until timeout for monitored process [2021-08-21 19:01:02,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:01:02,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:01:02,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 19:01:02,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:01:03,007 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 19:01:03,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981430654] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:03,007 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:01:03,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 19:01:03,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114627703] [2021-08-21 19:01:03,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 19:01:03,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:01:03,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 19:01:03,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:01:03,008 INFO L87 Difference]: Start difference. First operand 5168 states and 10912 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:03,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:01:03,097 INFO L93 Difference]: Finished difference Result 5596 states and 11621 transitions. [2021-08-21 19:01:03,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:01:03,098 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:01:03,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:01:03,104 INFO L225 Difference]: With dead ends: 5596 [2021-08-21 19:01:03,104 INFO L226 Difference]: Without dead ends: 5563 [2021-08-21 19:01:03,104 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.7ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:01:03,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5563 states. [2021-08-21 19:01:03,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5563 to 5263. [2021-08-21 19:01:03,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5263 states, 5262 states have (on average 2.1081337894336754) internal successors, (11093), 5262 states have internal predecessors, (11093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:03,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5263 states to 5263 states and 11093 transitions. [2021-08-21 19:01:03,155 INFO L78 Accepts]: Start accepts. Automaton has 5263 states and 11093 transitions. Word has length 32 [2021-08-21 19:01:03,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:01:03,156 INFO L470 AbstractCegarLoop]: Abstraction has 5263 states and 11093 transitions. [2021-08-21 19:01:03,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:03,156 INFO L276 IsEmpty]: Start isEmpty. Operand 5263 states and 11093 transitions. [2021-08-21 19:01:03,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:01:03,162 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:01:03,162 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:01:03,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Forceful destruction successful, exit code 0 [2021-08-21 19:01:03,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,239 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:03,380 INFO L402 AbstractCegarLoop]: === Iteration 255 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 19:01:03,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:01:03,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1250542177, now seen corresponding path program 135 times [2021-08-21 19:01:03,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:01:03,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349303266] [2021-08-21 19:01:03,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:01:03,380 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:01:03,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:03,503 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 19:01:03,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:01:03,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349303266] [2021-08-21 19:01:03,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349303266] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:03,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827313057] [2021-08-21 19:01:03,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 19:01:03,504 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:03,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:01:03,504 INFO L229 MonitoredProcess]: Starting monitored process 240 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:01:03,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Waiting until timeout for monitored process [2021-08-21 19:01:08,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 19:01:08,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:01:08,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 19:01:08,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:01:08,395 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 19:01:08,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827313057] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:08,396 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:01:08,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 19:01:08,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152570206] [2021-08-21 19:01:08,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 19:01:08,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:01:08,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 19:01:08,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:01:08,397 INFO L87 Difference]: Start difference. First operand 5263 states and 11093 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:08,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:01:08,522 INFO L93 Difference]: Finished difference Result 5679 states and 11673 transitions. [2021-08-21 19:01:08,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:01:08,523 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:01:08,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:01:08,530 INFO L225 Difference]: With dead ends: 5679 [2021-08-21 19:01:08,530 INFO L226 Difference]: Without dead ends: 5670 [2021-08-21 19:01:08,530 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.1ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:01:08,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5670 states. [2021-08-21 19:01:08,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5670 to 5211. [2021-08-21 19:01:08,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5211 states, 5210 states have (on average 2.107485604606526) internal successors, (10980), 5210 states have internal predecessors, (10980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:08,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5211 states to 5211 states and 10980 transitions. [2021-08-21 19:01:08,581 INFO L78 Accepts]: Start accepts. Automaton has 5211 states and 10980 transitions. Word has length 32 [2021-08-21 19:01:08,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:01:08,581 INFO L470 AbstractCegarLoop]: Abstraction has 5211 states and 10980 transitions. [2021-08-21 19:01:08,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:08,584 INFO L276 IsEmpty]: Start isEmpty. Operand 5211 states and 10980 transitions. [2021-08-21 19:01:08,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:01:08,591 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:01:08,592 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:01:08,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Forceful destruction successful, exit code 0 [2021-08-21 19:01:08,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,240 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:08,809 INFO L402 AbstractCegarLoop]: === Iteration 256 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 19:01:08,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:01:08,809 INFO L82 PathProgramCache]: Analyzing trace with hash -324924003, now seen corresponding path program 136 times [2021-08-21 19:01:08,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:01:08,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617144474] [2021-08-21 19:01:08,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:01:08,809 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:01:08,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:09,076 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:01:09,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:01:09,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617144474] [2021-08-21 19:01:09,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617144474] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:09,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758323462] [2021-08-21 19:01:09,081 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 19:01:09,081 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:09,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:01:09,082 INFO L229 MonitoredProcess]: Starting monitored process 241 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:01:09,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Waiting until timeout for monitored process [2021-08-21 19:01:13,692 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 19:01:13,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:01:13,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 19:01:13,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:01:13,872 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:01:13,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758323462] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:13,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:01:13,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 19:01:13,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097640829] [2021-08-21 19:01:13,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 19:01:13,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:01:13,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 19:01:13,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:01:13,882 INFO L87 Difference]: Start difference. First operand 5211 states and 10980 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:13,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:01:13,988 INFO L93 Difference]: Finished difference Result 5629 states and 11557 transitions. [2021-08-21 19:01:13,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:01:13,993 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:01:13,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:01:14,003 INFO L225 Difference]: With dead ends: 5629 [2021-08-21 19:01:14,003 INFO L226 Difference]: Without dead ends: 5624 [2021-08-21 19:01:14,005 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 56.9ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:01:14,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5624 states. [2021-08-21 19:01:14,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5624 to 5212. [2021-08-21 19:01:14,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5212 states, 5211 states have (on average 2.107848781423911) internal successors, (10984), 5211 states have internal predecessors, (10984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:14,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5212 states to 5212 states and 10984 transitions. [2021-08-21 19:01:14,203 INFO L78 Accepts]: Start accepts. Automaton has 5212 states and 10984 transitions. Word has length 32 [2021-08-21 19:01:14,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:01:14,203 INFO L470 AbstractCegarLoop]: Abstraction has 5212 states and 10984 transitions. [2021-08-21 19:01:14,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:14,203 INFO L276 IsEmpty]: Start isEmpty. Operand 5212 states and 10984 transitions. [2021-08-21 19:01:14,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:01:14,210 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:01:14,210 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:01:14,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Forceful destruction successful, exit code 0 [2021-08-21 19:01:14,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-08-21 19:01:14,433 INFO L402 AbstractCegarLoop]: === Iteration 257 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 19:01:14,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:01:14,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1636599275, now seen corresponding path program 137 times [2021-08-21 19:01:14,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:01:14,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528163982] [2021-08-21 19:01:14,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:01:14,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:01:14,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:14,539 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:01:14,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:01:14,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528163982] [2021-08-21 19:01:14,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528163982] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:14,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082883421] [2021-08-21 19:01:14,540 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 19:01:14,540 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:14,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:01:14,541 INFO L229 MonitoredProcess]: Starting monitored process 242 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:01:14,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Waiting until timeout for monitored process [2021-08-21 19:01:19,409 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 19:01:19,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:01:19,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 19:01:19,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:01:19,560 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:01:19,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082883421] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:19,560 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:01:19,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 19:01:19,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205102268] [2021-08-21 19:01:19,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 19:01:19,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:01:19,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 19:01:19,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:01:19,561 INFO L87 Difference]: Start difference. First operand 5212 states and 10984 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:19,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:01:19,664 INFO L93 Difference]: Finished difference Result 5663 states and 11597 transitions. [2021-08-21 19:01:19,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:01:19,665 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:01:19,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:01:19,671 INFO L225 Difference]: With dead ends: 5663 [2021-08-21 19:01:19,672 INFO L226 Difference]: Without dead ends: 5658 [2021-08-21 19:01:19,672 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:01:19,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5658 states. [2021-08-21 19:01:19,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5658 to 5179. [2021-08-21 19:01:19,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5179 states, 5178 states have (on average 2.1073773657782926) internal successors, (10912), 5178 states have internal predecessors, (10912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:19,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5179 states to 5179 states and 10912 transitions. [2021-08-21 19:01:19,857 INFO L78 Accepts]: Start accepts. Automaton has 5179 states and 10912 transitions. Word has length 32 [2021-08-21 19:01:19,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:01:19,857 INFO L470 AbstractCegarLoop]: Abstraction has 5179 states and 10912 transitions. [2021-08-21 19:01:19,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:19,858 INFO L276 IsEmpty]: Start isEmpty. Operand 5179 states and 10912 transitions. [2021-08-21 19:01:19,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:01:19,864 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:01:19,864 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:01:19,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Forceful destruction successful, exit code 0 [2021-08-21 19:01:20,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-08-21 19:01:20,081 INFO L402 AbstractCegarLoop]: === Iteration 258 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 19:01:20,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:01:20,081 INFO L82 PathProgramCache]: Analyzing trace with hash 810464089, now seen corresponding path program 138 times [2021-08-21 19:01:20,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:01:20,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482881836] [2021-08-21 19:01:20,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:01:20,081 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:01:20,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:20,185 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:01:20,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:01:20,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482881836] [2021-08-21 19:01:20,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482881836] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:20,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328858664] [2021-08-21 19:01:20,185 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 19:01:20,186 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:20,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:01:20,186 INFO L229 MonitoredProcess]: Starting monitored process 243 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:01:20,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Waiting until timeout for monitored process [2021-08-21 19:01:24,735 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 19:01:24,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:01:24,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 19:01:24,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:01:25,102 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:01:25,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328858664] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:25,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:01:25,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 19:01:25,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560905118] [2021-08-21 19:01:25,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 19:01:25,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:01:25,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 19:01:25,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:01:25,103 INFO L87 Difference]: Start difference. First operand 5179 states and 10912 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:25,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:01:25,199 INFO L93 Difference]: Finished difference Result 5664 states and 11684 transitions. [2021-08-21 19:01:25,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:01:25,199 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:01:25,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:01:25,206 INFO L225 Difference]: With dead ends: 5664 [2021-08-21 19:01:25,206 INFO L226 Difference]: Without dead ends: 5655 [2021-08-21 19:01:25,206 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.9ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:01:25,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5655 states. [2021-08-21 19:01:25,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5655 to 5207. [2021-08-21 19:01:25,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5207 states, 5206 states have (on average 2.108528620822128) internal successors, (10977), 5206 states have internal predecessors, (10977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:25,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5207 states to 5207 states and 10977 transitions. [2021-08-21 19:01:25,267 INFO L78 Accepts]: Start accepts. Automaton has 5207 states and 10977 transitions. Word has length 32 [2021-08-21 19:01:25,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:01:25,267 INFO L470 AbstractCegarLoop]: Abstraction has 5207 states and 10977 transitions. [2021-08-21 19:01:25,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:25,267 INFO L276 IsEmpty]: Start isEmpty. Operand 5207 states and 10977 transitions. [2021-08-21 19:01:25,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:01:25,275 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:01:25,275 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:01:25,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Forceful destruction successful, exit code 0 [2021-08-21 19:01:25,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-08-21 19:01:25,489 INFO L402 AbstractCegarLoop]: === Iteration 259 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 19:01:25,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:01:25,489 INFO L82 PathProgramCache]: Analyzing trace with hash -2069538919, now seen corresponding path program 139 times [2021-08-21 19:01:25,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:01:25,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384798639] [2021-08-21 19:01:25,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:01:25,489 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:01:25,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:25,587 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:01:25,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:01:25,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384798639] [2021-08-21 19:01:25,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384798639] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:25,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287229694] [2021-08-21 19:01:25,587 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 19:01:25,587 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:25,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:01:25,588 INFO L229 MonitoredProcess]: Starting monitored process 244 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:01:25,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Waiting until timeout for monitored process [2021-08-21 19:01:30,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:30,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 19:01:30,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:01:30,655 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:01:30,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287229694] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:30,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:01:30,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 19:01:30,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591633092] [2021-08-21 19:01:30,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 19:01:30,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:01:30,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 19:01:30,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:01:30,656 INFO L87 Difference]: Start difference. First operand 5207 states and 10977 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:30,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:01:30,772 INFO L93 Difference]: Finished difference Result 5602 states and 11525 transitions. [2021-08-21 19:01:30,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:01:30,773 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:01:30,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:01:30,780 INFO L225 Difference]: With dead ends: 5602 [2021-08-21 19:01:30,780 INFO L226 Difference]: Without dead ends: 5597 [2021-08-21 19:01:30,781 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.0ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:01:30,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5597 states. [2021-08-21 19:01:30,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5597 to 5180. [2021-08-21 19:01:30,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5180 states, 5179 states have (on average 2.106777370148677) internal successors, (10911), 5179 states have internal predecessors, (10911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:30,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5180 states to 5180 states and 10911 transitions. [2021-08-21 19:01:30,838 INFO L78 Accepts]: Start accepts. Automaton has 5180 states and 10911 transitions. Word has length 32 [2021-08-21 19:01:30,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:01:30,838 INFO L470 AbstractCegarLoop]: Abstraction has 5180 states and 10911 transitions. [2021-08-21 19:01:30,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:30,838 INFO L276 IsEmpty]: Start isEmpty. Operand 5180 states and 10911 transitions. [2021-08-21 19:01:30,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:01:30,844 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:01:30,844 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:01:30,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Forceful destruction successful, exit code 0 [2021-08-21 19:01:31,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,244 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:31,073 INFO L402 AbstractCegarLoop]: === Iteration 260 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 19:01:31,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:01:31,073 INFO L82 PathProgramCache]: Analyzing trace with hash 377524445, now seen corresponding path program 140 times [2021-08-21 19:01:31,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:01:31,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657720135] [2021-08-21 19:01:31,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:01:31,073 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:01:31,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:31,173 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:01:31,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:01:31,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657720135] [2021-08-21 19:01:31,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657720135] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:31,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685091313] [2021-08-21 19:01:31,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:01:31,173 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:31,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:01:31,174 INFO L229 MonitoredProcess]: Starting monitored process 245 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:01:31,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Waiting until timeout for monitored process [2021-08-21 19:01:35,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:01:35,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:01:35,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 19:01:35,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:01:36,107 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:01:36,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685091313] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:36,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:01:36,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 19:01:36,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120536645] [2021-08-21 19:01:36,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 19:01:36,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:01:36,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 19:01:36,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:01:36,108 INFO L87 Difference]: Start difference. First operand 5180 states and 10911 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:36,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:01:36,203 INFO L93 Difference]: Finished difference Result 5593 states and 11550 transitions. [2021-08-21 19:01:36,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:01:36,203 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:01:36,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:01:36,210 INFO L225 Difference]: With dead ends: 5593 [2021-08-21 19:01:36,211 INFO L226 Difference]: Without dead ends: 5584 [2021-08-21 19:01:36,211 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:01:36,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5584 states. [2021-08-21 19:01:36,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5584 to 5185. [2021-08-21 19:01:36,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5185 states, 5184 states have (on average 2.107831790123457) internal successors, (10927), 5184 states have internal predecessors, (10927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:36,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5185 states to 5185 states and 10927 transitions. [2021-08-21 19:01:36,267 INFO L78 Accepts]: Start accepts. Automaton has 5185 states and 10927 transitions. Word has length 32 [2021-08-21 19:01:36,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:01:36,267 INFO L470 AbstractCegarLoop]: Abstraction has 5185 states and 10927 transitions. [2021-08-21 19:01:36,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:36,268 INFO L276 IsEmpty]: Start isEmpty. Operand 5185 states and 10927 transitions. [2021-08-21 19:01:36,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:01:36,274 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:01:36,274 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:01:36,307 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Ended with exit code 0 [2021-08-21 19:01:36,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2021-08-21 19:01:36,489 INFO L402 AbstractCegarLoop]: === Iteration 261 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 19:01:36,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:01:36,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1323906655, now seen corresponding path program 141 times [2021-08-21 19:01:36,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:01:36,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619795549] [2021-08-21 19:01:36,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:01:36,489 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:01:36,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:36,587 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:01:36,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:01:36,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619795549] [2021-08-21 19:01:36,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619795549] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:36,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904657772] [2021-08-21 19:01:36,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 19:01:36,588 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:36,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:01:36,589 INFO L229 MonitoredProcess]: Starting monitored process 246 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:01:36,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Waiting until timeout for monitored process [2021-08-21 19:01:41,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 19:01:41,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:01:41,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 19:01:41,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:01:41,824 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:01:41,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904657772] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:41,824 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:01:41,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 19:01:41,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739856514] [2021-08-21 19:01:41,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 19:01:41,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:01:41,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 19:01:41,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:01:41,825 INFO L87 Difference]: Start difference. First operand 5185 states and 10927 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:41,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:01:41,931 INFO L93 Difference]: Finished difference Result 5557 states and 11481 transitions. [2021-08-21 19:01:41,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:01:41,931 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:01:41,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:01:41,938 INFO L225 Difference]: With dead ends: 5557 [2021-08-21 19:01:41,938 INFO L226 Difference]: Without dead ends: 5552 [2021-08-21 19:01:41,938 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.6ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:01:41,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5552 states. [2021-08-21 19:01:41,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5552 to 5174. [2021-08-21 19:01:41,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5174 states, 5173 states have (on average 2.1078677749855017) internal successors, (10904), 5173 states have internal predecessors, (10904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:41,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5174 states to 5174 states and 10904 transitions. [2021-08-21 19:01:41,989 INFO L78 Accepts]: Start accepts. Automaton has 5174 states and 10904 transitions. Word has length 32 [2021-08-21 19:01:41,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:01:41,989 INFO L470 AbstractCegarLoop]: Abstraction has 5174 states and 10904 transitions. [2021-08-21 19:01:41,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:41,990 INFO L276 IsEmpty]: Start isEmpty. Operand 5174 states and 10904 transitions. [2021-08-21 19:01:41,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:01:41,995 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:01:41,995 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:01:42,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Forceful destruction successful, exit code 0 [2021-08-21 19:01:42,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 246 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2021-08-21 19:01:42,209 INFO L402 AbstractCegarLoop]: === Iteration 262 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 19:01:42,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:01:42,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1332397661, now seen corresponding path program 142 times [2021-08-21 19:01:42,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:01:42,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695525619] [2021-08-21 19:01:42,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:01:42,209 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:01:42,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:42,306 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 19:01:42,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:01:42,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695525619] [2021-08-21 19:01:42,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695525619] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:42,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951442156] [2021-08-21 19:01:42,307 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 19:01:42,307 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:42,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:01:42,307 INFO L229 MonitoredProcess]: Starting monitored process 247 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:01:42,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Waiting until timeout for monitored process [2021-08-21 19:01:47,088 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 19:01:47,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:01:47,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 19:01:47,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:01:47,240 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 19:01:47,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951442156] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:47,240 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:01:47,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 19:01:47,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88718872] [2021-08-21 19:01:47,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 19:01:47,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:01:47,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 19:01:47,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:01:47,241 INFO L87 Difference]: Start difference. First operand 5174 states and 10904 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:47,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:01:47,341 INFO L93 Difference]: Finished difference Result 5539 states and 11430 transitions. [2021-08-21 19:01:47,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:01:47,342 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:01:47,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:01:47,348 INFO L225 Difference]: With dead ends: 5539 [2021-08-21 19:01:47,348 INFO L226 Difference]: Without dead ends: 5530 [2021-08-21 19:01:47,348 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.5ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:01:47,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5530 states. [2021-08-21 19:01:47,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5530 to 5142. [2021-08-21 19:01:47,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5142 states, 5141 states have (on average 2.105621474421319) internal successors, (10825), 5141 states have internal predecessors, (10825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:47,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5142 states to 5142 states and 10825 transitions. [2021-08-21 19:01:47,398 INFO L78 Accepts]: Start accepts. Automaton has 5142 states and 10825 transitions. Word has length 32 [2021-08-21 19:01:47,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:01:47,399 INFO L470 AbstractCegarLoop]: Abstraction has 5142 states and 10825 transitions. [2021-08-21 19:01:47,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:47,399 INFO L276 IsEmpty]: Start isEmpty. Operand 5142 states and 10825 transitions. [2021-08-21 19:01:47,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:01:47,404 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:01:47,404 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:01:47,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Forceful destruction successful, exit code 0 [2021-08-21 19:01:47,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,247 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:47,620 INFO L402 AbstractCegarLoop]: === Iteration 263 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 19:01:47,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:01:47,620 INFO L82 PathProgramCache]: Analyzing trace with hash -243068519, now seen corresponding path program 143 times [2021-08-21 19:01:47,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:01:47,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647452648] [2021-08-21 19:01:47,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:01:47,620 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:01:47,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:47,732 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:01:47,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:01:47,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647452648] [2021-08-21 19:01:47,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647452648] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:47,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565818106] [2021-08-21 19:01:47,732 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 19:01:47,733 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:47,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:01:47,733 INFO L229 MonitoredProcess]: Starting monitored process 248 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:01:47,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Waiting until timeout for monitored process [2021-08-21 19:01:52,600 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 19:01:52,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:01:52,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 19:01:52,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:01:52,769 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:01:52,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565818106] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:52,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:01:52,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 19:01:52,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13816454] [2021-08-21 19:01:52,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 19:01:52,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:01:52,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 19:01:52,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:01:52,770 INFO L87 Difference]: Start difference. First operand 5142 states and 10825 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:52,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:01:52,960 INFO L93 Difference]: Finished difference Result 5505 states and 11340 transitions. [2021-08-21 19:01:52,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:01:52,961 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:01:52,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:01:52,967 INFO L225 Difference]: With dead ends: 5505 [2021-08-21 19:01:52,967 INFO L226 Difference]: Without dead ends: 5500 [2021-08-21 19:01:52,967 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.3ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:01:52,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5500 states. [2021-08-21 19:01:53,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5500 to 5153. [2021-08-21 19:01:53,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5153 states, 5152 states have (on average 2.1053959627329193) internal successors, (10847), 5152 states have internal predecessors, (10847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:53,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5153 states to 5153 states and 10847 transitions. [2021-08-21 19:01:53,020 INFO L78 Accepts]: Start accepts. Automaton has 5153 states and 10847 transitions. Word has length 32 [2021-08-21 19:01:53,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:01:53,020 INFO L470 AbstractCegarLoop]: Abstraction has 5153 states and 10847 transitions. [2021-08-21 19:01:53,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:53,020 INFO L276 IsEmpty]: Start isEmpty. Operand 5153 states and 10847 transitions. [2021-08-21 19:01:53,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:01:53,026 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:01:53,026 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:01:53,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Forceful destruction successful, exit code 0 [2021-08-21 19:01:53,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,248 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:53,233 INFO L402 AbstractCegarLoop]: === Iteration 264 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 19:01:53,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:01:53,234 INFO L82 PathProgramCache]: Analyzing trace with hash 774387477, now seen corresponding path program 25 times [2021-08-21 19:01:53,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:01:53,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886406757] [2021-08-21 19:01:53,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:01:53,234 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:01:53,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:53,352 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:01:53,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:01:53,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886406757] [2021-08-21 19:01:53,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886406757] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:53,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124949569] [2021-08-21 19:01:53,352 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 19:01:53,352 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:53,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:01:53,353 INFO L229 MonitoredProcess]: Starting monitored process 249 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:01:53,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Waiting until timeout for monitored process [2021-08-21 19:01:58,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:58,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 19:01:58,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:01:58,311 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:01:58,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124949569] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:58,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:01:58,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 19:01:58,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842444494] [2021-08-21 19:01:58,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 19:01:58,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:01:58,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 19:01:58,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:01:58,312 INFO L87 Difference]: Start difference. First operand 5153 states and 10847 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:58,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:01:58,416 INFO L93 Difference]: Finished difference Result 5534 states and 11348 transitions. [2021-08-21 19:01:58,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:01:58,416 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:01:58,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:01:58,424 INFO L225 Difference]: With dead ends: 5534 [2021-08-21 19:01:58,425 INFO L226 Difference]: Without dead ends: 5529 [2021-08-21 19:01:58,425 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.5ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:01:58,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5529 states. [2021-08-21 19:01:58,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5529 to 5147. [2021-08-21 19:01:58,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5147 states, 5146 states have (on average 2.1041585697629226) internal successors, (10828), 5146 states have internal predecessors, (10828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:58,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5147 states to 5147 states and 10828 transitions. [2021-08-21 19:01:58,478 INFO L78 Accepts]: Start accepts. Automaton has 5147 states and 10828 transitions. Word has length 32 [2021-08-21 19:01:58,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:01:58,478 INFO L470 AbstractCegarLoop]: Abstraction has 5147 states and 10828 transitions. [2021-08-21 19:01:58,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:58,479 INFO L276 IsEmpty]: Start isEmpty. Operand 5147 states and 10828 transitions. [2021-08-21 19:01:58,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:01:58,484 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:01:58,484 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:01:58,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Forceful destruction successful, exit code 0 [2021-08-21 19:01:58,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,249 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:58,697 INFO L402 AbstractCegarLoop]: === Iteration 265 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 19:01:58,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:01:58,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1073516455, now seen corresponding path program 144 times [2021-08-21 19:01:58,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:01:58,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234194681] [2021-08-21 19:01:58,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:01:58,698 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:01:58,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:58,798 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:01:58,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:01:58,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234194681] [2021-08-21 19:01:58,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234194681] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:58,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240410940] [2021-08-21 19:01:58,798 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 19:01:58,799 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:58,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:01:58,799 INFO L229 MonitoredProcess]: Starting monitored process 250 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:01:58,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Waiting until timeout for monitored process [2021-08-21 19:02:03,811 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 19:02:03,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:02:03,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 19:02:03,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:02:03,952 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:02:03,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240410940] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:03,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:02:03,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 19:02:03,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925935574] [2021-08-21 19:02:03,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 19:02:03,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:02:03,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 19:02:03,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:02:03,953 INFO L87 Difference]: Start difference. First operand 5147 states and 10828 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:04,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:02:04,058 INFO L93 Difference]: Finished difference Result 5573 states and 11481 transitions. [2021-08-21 19:02:04,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:02:04,058 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:02:04,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:02:04,066 INFO L225 Difference]: With dead ends: 5573 [2021-08-21 19:02:04,066 INFO L226 Difference]: Without dead ends: 5564 [2021-08-21 19:02:04,066 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.0ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:02:04,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5564 states. [2021-08-21 19:02:04,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5564 to 5188. [2021-08-21 19:02:04,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5188 states, 5187 states have (on average 2.10641989589358) internal successors, (10926), 5187 states have internal predecessors, (10926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:04,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5188 states to 5188 states and 10926 transitions. [2021-08-21 19:02:04,121 INFO L78 Accepts]: Start accepts. Automaton has 5188 states and 10926 transitions. Word has length 32 [2021-08-21 19:02:04,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:02:04,121 INFO L470 AbstractCegarLoop]: Abstraction has 5188 states and 10926 transitions. [2021-08-21 19:02:04,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:04,121 INFO L276 IsEmpty]: Start isEmpty. Operand 5188 states and 10926 transitions. [2021-08-21 19:02:04,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:02:04,128 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:02:04,128 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:02:04,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Forceful destruction successful, exit code 0 [2021-08-21 19:02:04,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,250 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:04,353 INFO L402 AbstractCegarLoop]: === Iteration 266 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 19:02:04,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:02:04,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1520019741, now seen corresponding path program 145 times [2021-08-21 19:02:04,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:02:04,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321011287] [2021-08-21 19:02:04,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:02:04,353 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:02:04,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:02:04,462 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:02:04,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:02:04,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321011287] [2021-08-21 19:02:04,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321011287] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:04,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656745289] [2021-08-21 19:02:04,462 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 19:02:04,462 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:04,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:02:04,463 INFO L229 MonitoredProcess]: Starting monitored process 251 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:02:04,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Waiting until timeout for monitored process [2021-08-21 19:02:09,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:02:09,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 19:02:09,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:02:09,521 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:02:09,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656745289] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:09,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:02:09,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 19:02:09,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934725780] [2021-08-21 19:02:09,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 19:02:09,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:02:09,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 19:02:09,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:02:09,522 INFO L87 Difference]: Start difference. First operand 5188 states and 10926 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:09,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:02:09,619 INFO L93 Difference]: Finished difference Result 5578 states and 11495 transitions. [2021-08-21 19:02:09,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:02:09,619 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:02:09,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:02:09,626 INFO L225 Difference]: With dead ends: 5578 [2021-08-21 19:02:09,626 INFO L226 Difference]: Without dead ends: 5573 [2021-08-21 19:02:09,626 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.9ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:02:09,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5573 states. [2021-08-21 19:02:09,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5573 to 5177. [2021-08-21 19:02:09,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5177 states, 5176 states have (on average 2.105680061823802) internal successors, (10899), 5176 states have internal predecessors, (10899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:09,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5177 states to 5177 states and 10899 transitions. [2021-08-21 19:02:09,677 INFO L78 Accepts]: Start accepts. Automaton has 5177 states and 10899 transitions. Word has length 32 [2021-08-21 19:02:09,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:02:09,677 INFO L470 AbstractCegarLoop]: Abstraction has 5177 states and 10899 transitions. [2021-08-21 19:02:09,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:09,677 INFO L276 IsEmpty]: Start isEmpty. Operand 5177 states and 10899 transitions. [2021-08-21 19:02:09,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:02:09,683 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:02:09,683 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:02:09,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Forceful destruction successful, exit code 0 [2021-08-21 19:02:09,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-08-21 19:02:09,909 INFO L402 AbstractCegarLoop]: === Iteration 267 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 19:02:09,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:02:09,909 INFO L82 PathProgramCache]: Analyzing trace with hash -845391335, now seen corresponding path program 146 times [2021-08-21 19:02:09,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:02:09,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446410604] [2021-08-21 19:02:09,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:02:09,909 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:02:09,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:02:10,014 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:02:10,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:02:10,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446410604] [2021-08-21 19:02:10,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446410604] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:10,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778836986] [2021-08-21 19:02:10,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:02:10,015 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:10,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:02:10,015 INFO L229 MonitoredProcess]: Starting monitored process 252 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:02:10,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Waiting until timeout for monitored process [2021-08-21 19:02:14,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:02:14,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:02:14,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 19:02:14,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:02:15,137 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:02:15,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778836986] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:15,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:02:15,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 19:02:15,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802039262] [2021-08-21 19:02:15,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 19:02:15,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:02:15,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 19:02:15,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:02:15,138 INFO L87 Difference]: Start difference. First operand 5177 states and 10899 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:15,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:02:15,264 INFO L93 Difference]: Finished difference Result 5507 states and 11377 transitions. [2021-08-21 19:02:15,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:02:15,264 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:02:15,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:02:15,271 INFO L225 Difference]: With dead ends: 5507 [2021-08-21 19:02:15,271 INFO L226 Difference]: Without dead ends: 5502 [2021-08-21 19:02:15,271 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.9ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:02:15,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5502 states. [2021-08-21 19:02:15,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5502 to 5181. [2021-08-21 19:02:15,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5181 states, 5180 states have (on average 2.1063706563706566) internal successors, (10911), 5180 states have internal predecessors, (10911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:15,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5181 states to 5181 states and 10911 transitions. [2021-08-21 19:02:15,322 INFO L78 Accepts]: Start accepts. Automaton has 5181 states and 10911 transitions. Word has length 32 [2021-08-21 19:02:15,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:02:15,322 INFO L470 AbstractCegarLoop]: Abstraction has 5181 states and 10911 transitions. [2021-08-21 19:02:15,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:15,323 INFO L276 IsEmpty]: Start isEmpty. Operand 5181 states and 10911 transitions. [2021-08-21 19:02:15,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:02:15,328 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:02:15,328 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:02:15,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Forceful destruction successful, exit code 0 [2021-08-21 19:02:15,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-08-21 19:02:15,545 INFO L402 AbstractCegarLoop]: === Iteration 268 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 19:02:15,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:02:15,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1554743791, now seen corresponding path program 147 times [2021-08-21 19:02:15,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:02:15,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054550644] [2021-08-21 19:02:15,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:02:15,545 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:02:15,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:02:15,642 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:02:15,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:02:15,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054550644] [2021-08-21 19:02:15,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054550644] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:15,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276830735] [2021-08-21 19:02:15,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 19:02:15,642 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:15,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:02:15,643 INFO L229 MonitoredProcess]: Starting monitored process 253 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:02:15,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Waiting until timeout for monitored process [2021-08-21 19:02:20,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 19:02:20,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:02:20,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 19:02:20,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:02:20,807 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:02:20,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276830735] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:20,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:02:20,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 19:02:20,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958943660] [2021-08-21 19:02:20,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 19:02:20,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:02:20,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 19:02:20,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:02:20,809 INFO L87 Difference]: Start difference. First operand 5181 states and 10911 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:20,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:02:20,906 INFO L93 Difference]: Finished difference Result 5607 states and 11508 transitions. [2021-08-21 19:02:20,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:02:20,907 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:02:20,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:02:20,913 INFO L225 Difference]: With dead ends: 5607 [2021-08-21 19:02:20,913 INFO L226 Difference]: Without dead ends: 5602 [2021-08-21 19:02:20,913 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.3ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:02:20,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5602 states. [2021-08-21 19:02:20,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5602 to 5192. [2021-08-21 19:02:20,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5192 states, 5191 states have (on average 2.108071662492776) internal successors, (10943), 5191 states have internal predecessors, (10943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:20,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5192 states to 5192 states and 10943 transitions. [2021-08-21 19:02:20,963 INFO L78 Accepts]: Start accepts. Automaton has 5192 states and 10943 transitions. Word has length 32 [2021-08-21 19:02:20,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:02:20,963 INFO L470 AbstractCegarLoop]: Abstraction has 5192 states and 10943 transitions. [2021-08-21 19:02:20,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:20,963 INFO L276 IsEmpty]: Start isEmpty. Operand 5192 states and 10943 transitions. [2021-08-21 19:02:20,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:02:20,968 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:02:20,969 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:02:21,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Forceful destruction successful, exit code 0 [2021-08-21 19:02:21,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable267,253 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:21,191 INFO L402 AbstractCegarLoop]: === Iteration 269 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 19:02:21,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:02:21,191 INFO L82 PathProgramCache]: Analyzing trace with hash 892319573, now seen corresponding path program 148 times [2021-08-21 19:02:21,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:02:21,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366479930] [2021-08-21 19:02:21,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:02:21,192 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:02:21,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:02:21,310 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:02:21,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:02:21,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366479930] [2021-08-21 19:02:21,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366479930] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:21,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849743015] [2021-08-21 19:02:21,311 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 19:02:21,311 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:21,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:02:21,312 INFO L229 MonitoredProcess]: Starting monitored process 254 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:02:21,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Waiting until timeout for monitored process [2021-08-21 19:02:26,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 19:02:26,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:02:26,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 19:02:26,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:02:26,355 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:02:26,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849743015] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:26,355 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:02:26,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 19:02:26,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577953247] [2021-08-21 19:02:26,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 19:02:26,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:02:26,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 19:02:26,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:02:26,356 INFO L87 Difference]: Start difference. First operand 5192 states and 10943 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:26,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:02:26,456 INFO L93 Difference]: Finished difference Result 5595 states and 11550 transitions. [2021-08-21 19:02:26,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:02:26,457 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:02:26,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:02:26,463 INFO L225 Difference]: With dead ends: 5595 [2021-08-21 19:02:26,463 INFO L226 Difference]: Without dead ends: 5586 [2021-08-21 19:02:26,463 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.9ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:02:26,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5586 states. [2021-08-21 19:02:26,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5586 to 5173. [2021-08-21 19:02:26,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5173 states, 5172 states have (on average 2.1086620262954368) internal successors, (10906), 5172 states have internal predecessors, (10906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:26,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5173 states to 5173 states and 10906 transitions. [2021-08-21 19:02:26,547 INFO L78 Accepts]: Start accepts. Automaton has 5173 states and 10906 transitions. Word has length 32 [2021-08-21 19:02:26,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:02:26,547 INFO L470 AbstractCegarLoop]: Abstraction has 5173 states and 10906 transitions. [2021-08-21 19:02:26,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:26,547 INFO L276 IsEmpty]: Start isEmpty. Operand 5173 states and 10906 transitions. [2021-08-21 19:02:26,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:02:26,553 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:02:26,553 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:02:26,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Forceful destruction successful, exit code 0 [2021-08-21 19:02:26,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 254 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-08-21 19:02:26,767 INFO L402 AbstractCegarLoop]: === Iteration 270 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 19:02:26,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:02:26,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1152822557, now seen corresponding path program 149 times [2021-08-21 19:02:26,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:02:26,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188310175] [2021-08-21 19:02:26,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:02:26,768 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:02:26,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:02:26,868 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:02:26,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:02:26,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188310175] [2021-08-21 19:02:26,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188310175] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:26,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500091392] [2021-08-21 19:02:26,868 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 19:02:26,868 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:26,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:02:26,870 INFO L229 MonitoredProcess]: Starting monitored process 255 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:02:26,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Waiting until timeout for monitored process [2021-08-21 19:02:31,927 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 19:02:31,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:02:31,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 19:02:31,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:02:32,078 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:02:32,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500091392] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:32,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:02:32,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 19:02:32,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845912129] [2021-08-21 19:02:32,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 19:02:32,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:02:32,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 19:02:32,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:02:32,079 INFO L87 Difference]: Start difference. First operand 5173 states and 10906 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:32,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:02:32,190 INFO L93 Difference]: Finished difference Result 5530 states and 11401 transitions. [2021-08-21 19:02:32,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:02:32,190 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:02:32,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:02:32,197 INFO L225 Difference]: With dead ends: 5530 [2021-08-21 19:02:32,197 INFO L226 Difference]: Without dead ends: 5525 [2021-08-21 19:02:32,197 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.5ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:02:32,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5525 states. [2021-08-21 19:02:32,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5525 to 5167. [2021-08-21 19:02:32,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5167 states, 5166 states have (on average 2.108207510646535) internal successors, (10891), 5166 states have internal predecessors, (10891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:32,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5167 states to 5167 states and 10891 transitions. [2021-08-21 19:02:32,282 INFO L78 Accepts]: Start accepts. Automaton has 5167 states and 10891 transitions. Word has length 32 [2021-08-21 19:02:32,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:02:32,282 INFO L470 AbstractCegarLoop]: Abstraction has 5167 states and 10891 transitions. [2021-08-21 19:02:32,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:32,282 INFO L276 IsEmpty]: Start isEmpty. Operand 5167 states and 10891 transitions. [2021-08-21 19:02:32,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:02:32,288 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:02:32,288 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:02:32,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Forceful destruction successful, exit code 0 [2021-08-21 19:02:32,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2021-08-21 19:02:32,505 INFO L402 AbstractCegarLoop]: === Iteration 271 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 19:02:32,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:02:32,505 INFO L82 PathProgramCache]: Analyzing trace with hash -695081375, now seen corresponding path program 150 times [2021-08-21 19:02:32,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:02:32,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687746592] [2021-08-21 19:02:32,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:02:32,505 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:02:32,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:02:32,604 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:02:32,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:02:32,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687746592] [2021-08-21 19:02:32,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687746592] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:32,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357680378] [2021-08-21 19:02:32,604 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 19:02:32,604 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:32,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:02:32,614 INFO L229 MonitoredProcess]: Starting monitored process 256 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:02:32,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Waiting until timeout for monitored process [2021-08-21 19:02:37,804 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 19:02:37,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:02:37,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 19:02:37,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:02:37,961 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:02:37,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357680378] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:37,962 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:02:37,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 19:02:37,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310084622] [2021-08-21 19:02:37,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 19:02:37,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:02:37,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 19:02:37,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:02:37,962 INFO L87 Difference]: Start difference. First operand 5167 states and 10891 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:38,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:02:38,064 INFO L93 Difference]: Finished difference Result 5540 states and 11469 transitions. [2021-08-21 19:02:38,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:02:38,064 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:02:38,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:02:38,071 INFO L225 Difference]: With dead ends: 5540 [2021-08-21 19:02:38,071 INFO L226 Difference]: Without dead ends: 5531 [2021-08-21 19:02:38,071 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.1ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:02:38,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5531 states. [2021-08-21 19:02:38,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5531 to 5189. [2021-08-21 19:02:38,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5189 states, 5188 states have (on average 2.1090979182729375) internal successors, (10942), 5188 states have internal predecessors, (10942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:38,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5189 states to 5189 states and 10942 transitions. [2021-08-21 19:02:38,120 INFO L78 Accepts]: Start accepts. Automaton has 5189 states and 10942 transitions. Word has length 32 [2021-08-21 19:02:38,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:02:38,120 INFO L470 AbstractCegarLoop]: Abstraction has 5189 states and 10942 transitions. [2021-08-21 19:02:38,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:38,120 INFO L276 IsEmpty]: Start isEmpty. Operand 5189 states and 10942 transitions. [2021-08-21 19:02:38,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:02:38,125 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:02:38,126 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:02:38,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Forceful destruction successful, exit code 0 [2021-08-21 19:02:38,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 256 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2021-08-21 19:02:38,341 INFO L402 AbstractCegarLoop]: === Iteration 272 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 19:02:38,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:02:38,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1153606817, now seen corresponding path program 151 times [2021-08-21 19:02:38,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:02:38,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709103634] [2021-08-21 19:02:38,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:02:38,341 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:02:38,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:02:38,445 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:02:38,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:02:38,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709103634] [2021-08-21 19:02:38,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709103634] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:38,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463521364] [2021-08-21 19:02:38,446 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 19:02:38,447 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:38,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:02:38,448 INFO L229 MonitoredProcess]: Starting monitored process 257 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:02:38,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Waiting until timeout for monitored process [2021-08-21 19:02:43,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:02:43,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 19:02:43,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:02:43,654 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:02:43,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463521364] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:43,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:02:43,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 19:02:43,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528686771] [2021-08-21 19:02:43,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 19:02:43,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:02:43,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 19:02:43,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:02:43,658 INFO L87 Difference]: Start difference. First operand 5189 states and 10942 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:43,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:02:43,763 INFO L93 Difference]: Finished difference Result 5548 states and 11455 transitions. [2021-08-21 19:02:43,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:02:43,764 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:02:43,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:02:43,770 INFO L225 Difference]: With dead ends: 5548 [2021-08-21 19:02:43,770 INFO L226 Difference]: Without dead ends: 5543 [2021-08-21 19:02:43,770 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.0ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:02:43,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5543 states. [2021-08-21 19:02:43,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5543 to 5178. [2021-08-21 19:02:43,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5178 states, 5177 states have (on average 2.107977593200695) internal successors, (10913), 5177 states have internal predecessors, (10913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:43,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5178 states to 5178 states and 10913 transitions. [2021-08-21 19:02:43,820 INFO L78 Accepts]: Start accepts. Automaton has 5178 states and 10913 transitions. Word has length 32 [2021-08-21 19:02:43,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:02:43,820 INFO L470 AbstractCegarLoop]: Abstraction has 5178 states and 10913 transitions. [2021-08-21 19:02:43,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:43,821 INFO L276 IsEmpty]: Start isEmpty. Operand 5178 states and 10913 transitions. [2021-08-21 19:02:43,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:02:43,826 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:02:43,826 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:02:43,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Forceful destruction successful, exit code 0 [2021-08-21 19:02:44,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,257 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:44,036 INFO L402 AbstractCegarLoop]: === Iteration 273 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 19:02:44,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:02:44,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1898454821, now seen corresponding path program 152 times [2021-08-21 19:02:44,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:02:44,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780344328] [2021-08-21 19:02:44,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:02:44,037 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:02:44,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:02:44,136 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:02:44,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:02:44,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780344328] [2021-08-21 19:02:44,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780344328] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:44,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680228452] [2021-08-21 19:02:44,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:02:44,136 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:44,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:02:44,137 INFO L229 MonitoredProcess]: Starting monitored process 258 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:02:44,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Waiting until timeout for monitored process [2021-08-21 19:02:49,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:02:49,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:02:49,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 19:02:49,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:02:49,289 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:02:49,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680228452] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:49,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:02:49,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 19:02:49,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541709740] [2021-08-21 19:02:49,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 19:02:49,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:02:49,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 19:02:49,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:02:49,290 INFO L87 Difference]: Start difference. First operand 5178 states and 10913 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:49,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:02:49,396 INFO L93 Difference]: Finished difference Result 5542 states and 11441 transitions. [2021-08-21 19:02:49,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:02:49,396 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:02:49,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:02:49,403 INFO L225 Difference]: With dead ends: 5542 [2021-08-21 19:02:49,404 INFO L226 Difference]: Without dead ends: 5537 [2021-08-21 19:02:49,404 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.7ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:02:49,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5537 states. [2021-08-21 19:02:49,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5537 to 5182. [2021-08-21 19:02:49,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5182 states, 5181 states have (on average 2.108666280640803) internal successors, (10925), 5181 states have internal predecessors, (10925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:49,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5182 states to 5182 states and 10925 transitions. [2021-08-21 19:02:49,512 INFO L78 Accepts]: Start accepts. Automaton has 5182 states and 10925 transitions. Word has length 32 [2021-08-21 19:02:49,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:02:49,512 INFO L470 AbstractCegarLoop]: Abstraction has 5182 states and 10925 transitions. [2021-08-21 19:02:49,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:49,512 INFO L276 IsEmpty]: Start isEmpty. Operand 5182 states and 10925 transitions. [2021-08-21 19:02:49,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:02:49,518 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:02:49,518 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:02:49,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Forceful destruction successful, exit code 0 [2021-08-21 19:02:49,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,258 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:49,733 INFO L402 AbstractCegarLoop]: === Iteration 274 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 19:02:49,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:02:49,733 INFO L82 PathProgramCache]: Analyzing trace with hash 616595481, now seen corresponding path program 153 times [2021-08-21 19:02:49,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:02:49,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722934099] [2021-08-21 19:02:49,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:02:49,733 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:02:49,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:02:49,832 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:02:49,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:02:49,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722934099] [2021-08-21 19:02:49,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722934099] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:49,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961100458] [2021-08-21 19:02:49,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 19:02:49,832 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:49,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:02:49,833 INFO L229 MonitoredProcess]: Starting monitored process 259 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:02:49,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Waiting until timeout for monitored process [2021-08-21 19:02:54,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 19:02:54,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:02:54,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 19:02:54,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:02:54,997 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:02:54,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961100458] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:54,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:02:54,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 19:02:54,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685553117] [2021-08-21 19:02:54,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 19:02:54,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:02:55,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 19:02:55,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:02:55,000 INFO L87 Difference]: Start difference. First operand 5182 states and 10925 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:55,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:02:55,123 INFO L93 Difference]: Finished difference Result 5500 states and 11373 transitions. [2021-08-21 19:02:55,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:02:55,124 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:02:55,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:02:55,130 INFO L225 Difference]: With dead ends: 5500 [2021-08-21 19:02:55,130 INFO L226 Difference]: Without dead ends: 5495 [2021-08-21 19:02:55,130 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.1ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:02:55,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5495 states. [2021-08-21 19:02:55,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5495 to 5167. [2021-08-21 19:02:55,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5167 states, 5166 states have (on average 2.1062717770034842) internal successors, (10881), 5166 states have internal predecessors, (10881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:55,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5167 states to 5167 states and 10881 transitions. [2021-08-21 19:02:55,183 INFO L78 Accepts]: Start accepts. Automaton has 5167 states and 10881 transitions. Word has length 32 [2021-08-21 19:02:55,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:02:55,183 INFO L470 AbstractCegarLoop]: Abstraction has 5167 states and 10881 transitions. [2021-08-21 19:02:55,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:55,183 INFO L276 IsEmpty]: Start isEmpty. Operand 5167 states and 10881 transitions. [2021-08-21 19:02:55,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:02:55,189 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:02:55,189 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:02:55,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Forceful destruction successful, exit code 0 [2021-08-21 19:02:55,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable273 [2021-08-21 19:02:55,390 INFO L402 AbstractCegarLoop]: === Iteration 275 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 19:02:55,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:02:55,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1231308451, now seen corresponding path program 154 times [2021-08-21 19:02:55,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:02:55,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690561263] [2021-08-21 19:02:55,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:02:55,391 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:02:55,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:02:55,562 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:02:55,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:02:55,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690561263] [2021-08-21 19:02:55,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690561263] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:55,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109717461] [2021-08-21 19:02:55,562 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 19:02:55,562 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:55,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:02:55,563 INFO L229 MonitoredProcess]: Starting monitored process 260 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:02:55,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Waiting until timeout for monitored process [2021-08-21 19:03:00,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 19:03:00,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:03:00,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 19:03:00,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:03:00,734 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:03:00,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109717461] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:00,735 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:03:00,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 19:03:00,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405763918] [2021-08-21 19:03:00,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 19:03:00,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:00,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 19:03:00,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:03:00,735 INFO L87 Difference]: Start difference. First operand 5167 states and 10881 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:00,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:00,839 INFO L93 Difference]: Finished difference Result 5501 states and 11400 transitions. [2021-08-21 19:03:00,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:03:00,840 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:03:00,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:00,846 INFO L225 Difference]: With dead ends: 5501 [2021-08-21 19:03:00,846 INFO L226 Difference]: Without dead ends: 5492 [2021-08-21 19:03:00,846 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.9ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:03:00,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5492 states. [2021-08-21 19:03:00,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5492 to 5176. [2021-08-21 19:03:00,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5176 states, 5175 states have (on average 2.1068599033816424) internal successors, (10903), 5175 states have internal predecessors, (10903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:00,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5176 states to 5176 states and 10903 transitions. [2021-08-21 19:03:00,894 INFO L78 Accepts]: Start accepts. Automaton has 5176 states and 10903 transitions. Word has length 32 [2021-08-21 19:03:00,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:00,894 INFO L470 AbstractCegarLoop]: Abstraction has 5176 states and 10903 transitions. [2021-08-21 19:03:00,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:00,894 INFO L276 IsEmpty]: Start isEmpty. Operand 5176 states and 10903 transitions. [2021-08-21 19:03:00,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:03:00,901 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:00,901 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:03:00,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Forceful destruction successful, exit code 0 [2021-08-21 19:03:01,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,260 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:01,117 INFO L402 AbstractCegarLoop]: === Iteration 276 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 19:03:01,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:01,117 INFO L82 PathProgramCache]: Analyzing trace with hash 617379741, now seen corresponding path program 155 times [2021-08-21 19:03:01,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:01,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708029250] [2021-08-21 19:03:01,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:01,117 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:01,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:01,247 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:03:01,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:01,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708029250] [2021-08-21 19:03:01,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708029250] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:01,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566642633] [2021-08-21 19:03:01,247 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 19:03:01,247 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:01,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:03:01,248 INFO L229 MonitoredProcess]: Starting monitored process 261 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:03:01,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Waiting until timeout for monitored process [2021-08-21 19:03:06,325 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 19:03:06,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:03:06,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 19:03:06,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:03:06,478 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:03:06,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566642633] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:06,479 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:03:06,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 19:03:06,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56979840] [2021-08-21 19:03:06,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 19:03:06,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:06,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 19:03:06,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:03:06,479 INFO L87 Difference]: Start difference. First operand 5176 states and 10903 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:06,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:06,591 INFO L93 Difference]: Finished difference Result 5487 states and 11345 transitions. [2021-08-21 19:03:06,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:03:06,591 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:03:06,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:06,597 INFO L225 Difference]: With dead ends: 5487 [2021-08-21 19:03:06,597 INFO L226 Difference]: Without dead ends: 5482 [2021-08-21 19:03:06,598 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.8ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:03:06,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5482 states. [2021-08-21 19:03:06,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5482 to 5169. [2021-08-21 19:03:06,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5169 states, 5168 states have (on average 2.1060371517027865) internal successors, (10884), 5168 states have internal predecessors, (10884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:06,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5169 states to 5169 states and 10884 transitions. [2021-08-21 19:03:06,648 INFO L78 Accepts]: Start accepts. Automaton has 5169 states and 10884 transitions. Word has length 32 [2021-08-21 19:03:06,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:06,648 INFO L470 AbstractCegarLoop]: Abstraction has 5169 states and 10884 transitions. [2021-08-21 19:03:06,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:06,648 INFO L276 IsEmpty]: Start isEmpty. Operand 5169 states and 10884 transitions. [2021-08-21 19:03:06,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:03:06,653 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:06,653 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:03:06,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Forceful destruction successful, exit code 0 [2021-08-21 19:03:06,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,261 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:06,855 INFO L402 AbstractCegarLoop]: === Iteration 277 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 19:03:06,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:06,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1362227745, now seen corresponding path program 156 times [2021-08-21 19:03:06,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:06,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417073935] [2021-08-21 19:03:06,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:06,855 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:06,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:06,971 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:03:06,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:06,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417073935] [2021-08-21 19:03:06,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417073935] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:06,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530522080] [2021-08-21 19:03:06,971 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 19:03:06,971 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:06,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:03:06,972 INFO L229 MonitoredProcess]: Starting monitored process 262 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:03:06,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Waiting until timeout for monitored process [2021-08-21 19:03:12,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 19:03:12,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:03:12,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 19:03:12,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:03:12,140 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:03:12,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530522080] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:12,141 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:03:12,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 19:03:12,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942468091] [2021-08-21 19:03:12,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 19:03:12,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:12,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 19:03:12,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:03:12,141 INFO L87 Difference]: Start difference. First operand 5169 states and 10884 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:12,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:12,235 INFO L93 Difference]: Finished difference Result 5488 states and 11347 transitions. [2021-08-21 19:03:12,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:03:12,235 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:03:12,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:12,241 INFO L225 Difference]: With dead ends: 5488 [2021-08-21 19:03:12,241 INFO L226 Difference]: Without dead ends: 5483 [2021-08-21 19:03:12,241 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.9ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:03:12,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5483 states. [2021-08-21 19:03:12,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5483 to 5162. [2021-08-21 19:03:12,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5162 states, 5161 states have (on average 2.1059872117806626) internal successors, (10869), 5161 states have internal predecessors, (10869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:12,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5162 states to 5162 states and 10869 transitions. [2021-08-21 19:03:12,290 INFO L78 Accepts]: Start accepts. Automaton has 5162 states and 10869 transitions. Word has length 32 [2021-08-21 19:03:12,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:12,290 INFO L470 AbstractCegarLoop]: Abstraction has 5162 states and 10869 transitions. [2021-08-21 19:03:12,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:12,290 INFO L276 IsEmpty]: Start isEmpty. Operand 5162 states and 10869 transitions. [2021-08-21 19:03:12,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:03:12,295 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:12,295 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:03:12,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Forceful destruction successful, exit code 0 [2021-08-21 19:03:12,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable276,262 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:12,517 INFO L402 AbstractCegarLoop]: === Iteration 278 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 19:03:12,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:12,517 INFO L82 PathProgramCache]: Analyzing trace with hash -132579691, now seen corresponding path program 157 times [2021-08-21 19:03:12,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:12,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085211415] [2021-08-21 19:03:12,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:12,517 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:12,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:12,687 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:03:12,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:12,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085211415] [2021-08-21 19:03:12,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085211415] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:12,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662752009] [2021-08-21 19:03:12,688 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 19:03:12,688 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:12,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:03:12,688 INFO L229 MonitoredProcess]: Starting monitored process 263 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:03:12,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Waiting until timeout for monitored process [2021-08-21 19:03:18,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:18,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 19:03:18,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:03:18,197 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:03:18,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662752009] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:18,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:03:18,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 19:03:18,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460227086] [2021-08-21 19:03:18,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 19:03:18,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:18,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 19:03:18,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:03:18,198 INFO L87 Difference]: Start difference. First operand 5162 states and 10869 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:18,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:18,297 INFO L93 Difference]: Finished difference Result 5444 states and 11282 transitions. [2021-08-21 19:03:18,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:03:18,297 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:03:18,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:18,303 INFO L225 Difference]: With dead ends: 5444 [2021-08-21 19:03:18,303 INFO L226 Difference]: Without dead ends: 5439 [2021-08-21 19:03:18,303 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.3ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:03:18,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5439 states. [2021-08-21 19:03:18,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5439 to 5139. [2021-08-21 19:03:18,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5139 states, 5138 states have (on average 2.1031529778123783) internal successors, (10806), 5138 states have internal predecessors, (10806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:18,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5139 states to 5139 states and 10806 transitions. [2021-08-21 19:03:18,352 INFO L78 Accepts]: Start accepts. Automaton has 5139 states and 10806 transitions. Word has length 32 [2021-08-21 19:03:18,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:18,353 INFO L470 AbstractCegarLoop]: Abstraction has 5139 states and 10806 transitions. [2021-08-21 19:03:18,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:18,353 INFO L276 IsEmpty]: Start isEmpty. Operand 5139 states and 10806 transitions. [2021-08-21 19:03:18,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:03:18,358 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:18,358 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:03:18,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Forceful destruction successful, exit code 0 [2021-08-21 19:03:18,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-08-21 19:03:18,574 INFO L402 AbstractCegarLoop]: === Iteration 279 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 19:03:18,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:18,574 INFO L82 PathProgramCache]: Analyzing trace with hash 362848273, now seen corresponding path program 158 times [2021-08-21 19:03:18,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:18,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880698792] [2021-08-21 19:03:18,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:18,575 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:18,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:18,669 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:03:18,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:18,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880698792] [2021-08-21 19:03:18,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880698792] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:18,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361987932] [2021-08-21 19:03:18,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:03:18,669 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:18,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:03:18,670 INFO L229 MonitoredProcess]: Starting monitored process 264 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:03:18,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Waiting until timeout for monitored process [2021-08-21 19:03:23,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:03:23,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:03:23,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 19:03:23,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:03:23,842 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:03:23,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361987932] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:23,842 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:03:23,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 19:03:23,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094461197] [2021-08-21 19:03:23,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 19:03:23,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:23,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 19:03:23,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:03:23,843 INFO L87 Difference]: Start difference. First operand 5139 states and 10806 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:23,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:23,944 INFO L93 Difference]: Finished difference Result 5541 states and 11360 transitions. [2021-08-21 19:03:23,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:03:23,945 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:03:23,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:23,951 INFO L225 Difference]: With dead ends: 5541 [2021-08-21 19:03:23,951 INFO L226 Difference]: Without dead ends: 5536 [2021-08-21 19:03:23,951 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.3ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:03:23,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5536 states. [2021-08-21 19:03:23,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5536 to 5130. [2021-08-21 19:03:23,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5130 states, 5129 states have (on average 2.101774224995126) internal successors, (10780), 5129 states have internal predecessors, (10780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:24,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5130 states to 5130 states and 10780 transitions. [2021-08-21 19:03:24,000 INFO L78 Accepts]: Start accepts. Automaton has 5130 states and 10780 transitions. Word has length 32 [2021-08-21 19:03:24,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:24,000 INFO L470 AbstractCegarLoop]: Abstraction has 5130 states and 10780 transitions. [2021-08-21 19:03:24,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:24,000 INFO L276 IsEmpty]: Start isEmpty. Operand 5130 states and 10780 transitions. [2021-08-21 19:03:24,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:03:24,005 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:24,006 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:03:24,038 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Ended with exit code 0 [2021-08-21 19:03:24,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-08-21 19:03:24,233 INFO L402 AbstractCegarLoop]: === Iteration 280 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 19:03:24,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:24,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1485055659, now seen corresponding path program 159 times [2021-08-21 19:03:24,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:24,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416741428] [2021-08-21 19:03:24,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:24,233 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:24,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:24,343 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:03:24,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:24,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416741428] [2021-08-21 19:03:24,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416741428] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:24,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082373337] [2021-08-21 19:03:24,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 19:03:24,344 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:24,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:03:24,344 INFO L229 MonitoredProcess]: Starting monitored process 265 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:03:24,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Waiting until timeout for monitored process [2021-08-21 19:03:29,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 19:03:29,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:03:29,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 19:03:29,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:03:29,760 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:03:29,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082373337] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:29,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:03:29,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 19:03:29,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922088418] [2021-08-21 19:03:29,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 19:03:29,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:29,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 19:03:29,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:03:29,761 INFO L87 Difference]: Start difference. First operand 5130 states and 10780 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:29,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:29,850 INFO L93 Difference]: Finished difference Result 5512 states and 11337 transitions. [2021-08-21 19:03:29,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:03:29,851 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:03:29,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:29,856 INFO L225 Difference]: With dead ends: 5512 [2021-08-21 19:03:29,856 INFO L226 Difference]: Without dead ends: 5503 [2021-08-21 19:03:29,856 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.2ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:03:29,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5503 states. [2021-08-21 19:03:29,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5503 to 5084. [2021-08-21 19:03:29,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5084 states, 5083 states have (on average 2.1001377139484556) internal successors, (10675), 5083 states have internal predecessors, (10675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:29,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5084 states to 5084 states and 10675 transitions. [2021-08-21 19:03:29,906 INFO L78 Accepts]: Start accepts. Automaton has 5084 states and 10675 transitions. Word has length 32 [2021-08-21 19:03:29,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:29,906 INFO L470 AbstractCegarLoop]: Abstraction has 5084 states and 10675 transitions. [2021-08-21 19:03:29,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:29,906 INFO L276 IsEmpty]: Start isEmpty. Operand 5084 states and 10675 transitions. [2021-08-21 19:03:29,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:03:29,911 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:29,911 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:03:29,943 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Ended with exit code 0 [2021-08-21 19:03:30,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-08-21 19:03:30,128 INFO L402 AbstractCegarLoop]: === Iteration 281 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 19:03:30,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:30,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1108480537, now seen corresponding path program 160 times [2021-08-21 19:03:30,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:30,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332956020] [2021-08-21 19:03:30,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:30,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:30,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:30,226 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:03:30,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:30,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332956020] [2021-08-21 19:03:30,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332956020] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:30,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259104078] [2021-08-21 19:03:30,226 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 19:03:30,226 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:30,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:03:30,227 INFO L229 MonitoredProcess]: Starting monitored process 266 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:03:30,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Waiting until timeout for monitored process [2021-08-21 19:03:35,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 19:03:35,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:03:35,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 19:03:35,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:03:35,498 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:03:35,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259104078] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:35,498 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:03:35,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 19:03:35,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198776877] [2021-08-21 19:03:35,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 19:03:35,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:35,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 19:03:35,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:03:35,500 INFO L87 Difference]: Start difference. First operand 5084 states and 10675 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:35,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:35,600 INFO L93 Difference]: Finished difference Result 5454 states and 11213 transitions. [2021-08-21 19:03:35,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:03:35,600 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:03:35,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:35,607 INFO L225 Difference]: With dead ends: 5454 [2021-08-21 19:03:35,607 INFO L226 Difference]: Without dead ends: 5449 [2021-08-21 19:03:35,607 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.5ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:03:35,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5449 states. [2021-08-21 19:03:35,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5449 to 5031. [2021-08-21 19:03:35,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5031 states, 5030 states have (on average 2.100596421471173) internal successors, (10566), 5030 states have internal predecessors, (10566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:35,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5031 states to 5031 states and 10566 transitions. [2021-08-21 19:03:35,656 INFO L78 Accepts]: Start accepts. Automaton has 5031 states and 10566 transitions. Word has length 32 [2021-08-21 19:03:35,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:35,656 INFO L470 AbstractCegarLoop]: Abstraction has 5031 states and 10566 transitions. [2021-08-21 19:03:35,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:35,656 INFO L276 IsEmpty]: Start isEmpty. Operand 5031 states and 10566 transitions. [2021-08-21 19:03:35,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:03:35,662 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:35,662 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:03:35,693 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Ended with exit code 0 [2021-08-21 19:03:35,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable280 [2021-08-21 19:03:35,889 INFO L402 AbstractCegarLoop]: === Iteration 282 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 19:03:35,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:35,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1256930539, now seen corresponding path program 161 times [2021-08-21 19:03:35,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:35,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652146595] [2021-08-21 19:03:35,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:35,889 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:35,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:35,998 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:03:35,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:35,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652146595] [2021-08-21 19:03:35,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652146595] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:35,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718270398] [2021-08-21 19:03:35,999 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 19:03:35,999 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:35,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:03:36,000 INFO L229 MonitoredProcess]: Starting monitored process 267 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:03:36,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Waiting until timeout for monitored process [2021-08-21 19:03:41,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 19:03:41,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:03:41,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 19:03:41,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:03:41,246 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:03:41,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718270398] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:41,246 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:03:41,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 19:03:41,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977608244] [2021-08-21 19:03:41,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 19:03:41,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:41,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 19:03:41,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:03:41,247 INFO L87 Difference]: Start difference. First operand 5031 states and 10566 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:41,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:41,353 INFO L93 Difference]: Finished difference Result 5339 states and 11017 transitions. [2021-08-21 19:03:41,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:03:41,353 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:03:41,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:41,360 INFO L225 Difference]: With dead ends: 5339 [2021-08-21 19:03:41,360 INFO L226 Difference]: Without dead ends: 5334 [2021-08-21 19:03:41,360 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.0ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:03:41,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5334 states. [2021-08-21 19:03:41,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5334 to 4972. [2021-08-21 19:03:41,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4972 states, 4971 states have (on average 2.0937437135385233) internal successors, (10408), 4971 states have internal predecessors, (10408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:41,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4972 states to 4972 states and 10408 transitions. [2021-08-21 19:03:41,409 INFO L78 Accepts]: Start accepts. Automaton has 4972 states and 10408 transitions. Word has length 32 [2021-08-21 19:03:41,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:41,409 INFO L470 AbstractCegarLoop]: Abstraction has 4972 states and 10408 transitions. [2021-08-21 19:03:41,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:41,410 INFO L276 IsEmpty]: Start isEmpty. Operand 4972 states and 10408 transitions. [2021-08-21 19:03:41,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:03:41,415 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:41,415 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:03:41,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Forceful destruction successful, exit code 0 [2021-08-21 19:03:41,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,267 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:41,637 INFO L402 AbstractCegarLoop]: === Iteration 283 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 19:03:41,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:41,637 INFO L82 PathProgramCache]: Analyzing trace with hash -549010599, now seen corresponding path program 162 times [2021-08-21 19:03:41,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:41,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314050124] [2021-08-21 19:03:41,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:41,637 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:41,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:41,738 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 19:03:41,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:41,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314050124] [2021-08-21 19:03:41,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314050124] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:41,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359878257] [2021-08-21 19:03:41,739 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 19:03:41,739 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:41,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:03:41,739 INFO L229 MonitoredProcess]: Starting monitored process 268 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:03:41,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Waiting until timeout for monitored process [2021-08-21 19:03:47,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 19:03:47,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:03:47,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 19:03:47,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:03:47,153 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 19:03:47,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359878257] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:47,153 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:03:47,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 19:03:47,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785723576] [2021-08-21 19:03:47,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 19:03:47,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:47,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 19:03:47,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:03:47,154 INFO L87 Difference]: Start difference. First operand 4972 states and 10408 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:47,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:47,244 INFO L93 Difference]: Finished difference Result 5322 states and 10957 transitions. [2021-08-21 19:03:47,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:03:47,244 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:03:47,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:47,250 INFO L225 Difference]: With dead ends: 5322 [2021-08-21 19:03:47,250 INFO L226 Difference]: Without dead ends: 5289 [2021-08-21 19:03:47,250 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.3ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:03:47,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5289 states. [2021-08-21 19:03:47,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5289 to 4986. [2021-08-21 19:03:47,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4986 states, 4985 states have (on average 2.092477432296891) internal successors, (10431), 4985 states have internal predecessors, (10431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:47,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4986 states to 4986 states and 10431 transitions. [2021-08-21 19:03:47,299 INFO L78 Accepts]: Start accepts. Automaton has 4986 states and 10431 transitions. Word has length 32 [2021-08-21 19:03:47,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:47,299 INFO L470 AbstractCegarLoop]: Abstraction has 4986 states and 10431 transitions. [2021-08-21 19:03:47,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:47,299 INFO L276 IsEmpty]: Start isEmpty. Operand 4986 states and 10431 transitions. [2021-08-21 19:03:47,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:03:47,305 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:47,305 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:03:47,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Forceful destruction successful, exit code 0 [2021-08-21 19:03:47,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2021-08-21 19:03:47,521 INFO L402 AbstractCegarLoop]: === Iteration 284 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 19:03:47,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:47,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1054579743, now seen corresponding path program 163 times [2021-08-21 19:03:47,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:47,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438659117] [2021-08-21 19:03:47,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:47,521 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:47,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:47,624 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 19:03:47,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:47,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438659117] [2021-08-21 19:03:47,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438659117] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:47,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836121162] [2021-08-21 19:03:47,624 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 19:03:47,624 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:47,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:03:47,625 INFO L229 MonitoredProcess]: Starting monitored process 269 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:03:47,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Waiting until timeout for monitored process [2021-08-21 19:03:52,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:52,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 19:03:52,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:03:53,032 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 19:03:53,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836121162] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:53,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:03:53,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 19:03:53,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490178940] [2021-08-21 19:03:53,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 19:03:53,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:53,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 19:03:53,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:03:53,033 INFO L87 Difference]: Start difference. First operand 4986 states and 10431 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:53,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:53,121 INFO L93 Difference]: Finished difference Result 5382 states and 11066 transitions. [2021-08-21 19:03:53,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:03:53,121 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:03:53,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:53,127 INFO L225 Difference]: With dead ends: 5382 [2021-08-21 19:03:53,127 INFO L226 Difference]: Without dead ends: 5373 [2021-08-21 19:03:53,127 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.3ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:03:53,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5373 states. [2021-08-21 19:03:53,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5373 to 5034. [2021-08-21 19:03:53,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5034 states, 5033 states have (on average 2.0941784224120803) internal successors, (10540), 5033 states have internal predecessors, (10540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:53,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5034 states to 5034 states and 10540 transitions. [2021-08-21 19:03:53,174 INFO L78 Accepts]: Start accepts. Automaton has 5034 states and 10540 transitions. Word has length 32 [2021-08-21 19:03:53,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:53,174 INFO L470 AbstractCegarLoop]: Abstraction has 5034 states and 10540 transitions. [2021-08-21 19:03:53,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:53,175 INFO L276 IsEmpty]: Start isEmpty. Operand 5034 states and 10540 transitions. [2021-08-21 19:03:53,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:03:53,180 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:53,180 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:03:53,212 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Ended with exit code 0 [2021-08-21 19:03:53,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,269 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:53,393 INFO L402 AbstractCegarLoop]: === Iteration 285 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 19:03:53,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:53,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1664921373, now seen corresponding path program 164 times [2021-08-21 19:03:53,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:53,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94019542] [2021-08-21 19:03:53,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:53,393 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:53,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:53,499 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:03:53,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:53,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94019542] [2021-08-21 19:03:53,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94019542] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:53,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669032078] [2021-08-21 19:03:53,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:03:53,499 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:53,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:03:53,500 INFO L229 MonitoredProcess]: Starting monitored process 270 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:03:53,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Waiting until timeout for monitored process [2021-08-21 19:03:58,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:03:58,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:03:58,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 19:03:58,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:03:58,772 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:03:58,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669032078] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:58,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:03:58,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 19:03:58,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488688993] [2021-08-21 19:03:58,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 19:03:58,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:58,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 19:03:58,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:03:58,773 INFO L87 Difference]: Start difference. First operand 5034 states and 10540 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:58,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:58,872 INFO L93 Difference]: Finished difference Result 5388 states and 11036 transitions. [2021-08-21 19:03:58,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:03:58,873 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:03:58,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:58,880 INFO L225 Difference]: With dead ends: 5388 [2021-08-21 19:03:58,880 INFO L226 Difference]: Without dead ends: 5383 [2021-08-21 19:03:58,880 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.3ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:03:58,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5383 states. [2021-08-21 19:03:58,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5383 to 5026. [2021-08-21 19:03:58,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5026 states, 5025 states have (on average 2.0925373134328358) internal successors, (10515), 5025 states have internal predecessors, (10515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:58,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5026 states to 5026 states and 10515 transitions. [2021-08-21 19:03:58,933 INFO L78 Accepts]: Start accepts. Automaton has 5026 states and 10515 transitions. Word has length 32 [2021-08-21 19:03:58,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:58,933 INFO L470 AbstractCegarLoop]: Abstraction has 5026 states and 10515 transitions. [2021-08-21 19:03:58,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:58,933 INFO L276 IsEmpty]: Start isEmpty. Operand 5026 states and 10515 transitions. [2021-08-21 19:03:58,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:03:58,938 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:58,938 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:03:58,970 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Ended with exit code 0 [2021-08-21 19:03:59,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,270 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:59,142 INFO L402 AbstractCegarLoop]: === Iteration 286 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 19:03:59,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:59,142 INFO L82 PathProgramCache]: Analyzing trace with hash -972724259, now seen corresponding path program 165 times [2021-08-21 19:03:59,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:59,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094013398] [2021-08-21 19:03:59,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:59,143 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:59,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:59,270 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 19:03:59,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:59,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094013398] [2021-08-21 19:03:59,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094013398] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:59,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513698662] [2021-08-21 19:03:59,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 19:03:59,270 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:59,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:03:59,271 INFO L229 MonitoredProcess]: Starting monitored process 271 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:03:59,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Waiting until timeout for monitored process [2021-08-21 19:04:04,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 19:04:04,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:04:04,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 19:04:04,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:04:04,763 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 19:04:04,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513698662] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:04,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:04:04,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 19:04:04,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091384579] [2021-08-21 19:04:04,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 19:04:04,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:04:04,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 19:04:04,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:04:04,764 INFO L87 Difference]: Start difference. First operand 5026 states and 10515 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:04,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:04:04,856 INFO L93 Difference]: Finished difference Result 5396 states and 11107 transitions. [2021-08-21 19:04:04,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:04:04,856 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:04:04,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:04:04,862 INFO L225 Difference]: With dead ends: 5396 [2021-08-21 19:04:04,863 INFO L226 Difference]: Without dead ends: 5387 [2021-08-21 19:04:04,863 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.0ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:04:04,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5387 states. [2021-08-21 19:04:04,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5387 to 5038. [2021-08-21 19:04:04,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5038 states, 5037 states have (on average 2.0943021639865) internal successors, (10549), 5037 states have internal predecessors, (10549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:04,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5038 states to 5038 states and 10549 transitions. [2021-08-21 19:04:04,909 INFO L78 Accepts]: Start accepts. Automaton has 5038 states and 10549 transitions. Word has length 32 [2021-08-21 19:04:04,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:04:04,909 INFO L470 AbstractCegarLoop]: Abstraction has 5038 states and 10549 transitions. [2021-08-21 19:04:04,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:04,909 INFO L276 IsEmpty]: Start isEmpty. Operand 5038 states and 10549 transitions. [2021-08-21 19:04:04,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:04:04,915 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:04:04,915 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:04:04,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Ended with exit code 0 [2021-08-21 19:04:05,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,271 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:05,129 INFO L402 AbstractCegarLoop]: === Iteration 287 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 19:04:05,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:04:05,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1746776857, now seen corresponding path program 166 times [2021-08-21 19:04:05,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:04:05,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589190575] [2021-08-21 19:04:05,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:05,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:04:05,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:05,231 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:04:05,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:04:05,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589190575] [2021-08-21 19:04:05,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589190575] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:05,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470505985] [2021-08-21 19:04:05,231 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 19:04:05,231 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:05,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:04:05,232 INFO L229 MonitoredProcess]: Starting monitored process 272 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:04:05,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Waiting until timeout for monitored process [2021-08-21 19:04:10,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 19:04:10,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:04:10,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 19:04:10,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:04:10,658 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:04:10,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470505985] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:10,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:04:10,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 19:04:10,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665854956] [2021-08-21 19:04:10,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 19:04:10,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:04:10,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 19:04:10,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:04:10,659 INFO L87 Difference]: Start difference. First operand 5038 states and 10549 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:10,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:04:10,755 INFO L93 Difference]: Finished difference Result 5353 states and 11006 transitions. [2021-08-21 19:04:10,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:04:10,756 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:04:10,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:04:10,762 INFO L225 Difference]: With dead ends: 5353 [2021-08-21 19:04:10,762 INFO L226 Difference]: Without dead ends: 5348 [2021-08-21 19:04:10,762 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.0ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:04:10,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5348 states. [2021-08-21 19:04:10,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5348 to 5014. [2021-08-21 19:04:10,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5014 states, 5013 states have (on average 2.0919609016556953) internal successors, (10487), 5013 states have internal predecessors, (10487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:10,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5014 states to 5014 states and 10487 transitions. [2021-08-21 19:04:10,809 INFO L78 Accepts]: Start accepts. Automaton has 5014 states and 10487 transitions. Word has length 32 [2021-08-21 19:04:10,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:04:10,809 INFO L470 AbstractCegarLoop]: Abstraction has 5014 states and 10487 transitions. [2021-08-21 19:04:10,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:10,809 INFO L276 IsEmpty]: Start isEmpty. Operand 5014 states and 10487 transitions. [2021-08-21 19:04:10,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:04:10,814 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:04:10,814 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:04:10,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Forceful destruction successful, exit code 0 [2021-08-21 19:04:11,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,272 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:11,041 INFO L402 AbstractCegarLoop]: === Iteration 288 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 19:04:11,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:04:11,041 INFO L82 PathProgramCache]: Analyzing trace with hash 435101585, now seen corresponding path program 167 times [2021-08-21 19:04:11,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:04:11,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697011643] [2021-08-21 19:04:11,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:11,041 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:04:11,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:11,271 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:04:11,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:04:11,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697011643] [2021-08-21 19:04:11,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697011643] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:11,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031570857] [2021-08-21 19:04:11,271 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 19:04:11,271 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:11,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:04:11,272 INFO L229 MonitoredProcess]: Starting monitored process 273 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:04:11,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Waiting until timeout for monitored process [2021-08-21 19:04:16,395 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 19:04:16,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:04:16,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 19:04:16,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:04:16,549 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:04:16,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031570857] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:16,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:04:16,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 19:04:16,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482198885] [2021-08-21 19:04:16,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 19:04:16,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:04:16,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 19:04:16,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:04:16,550 INFO L87 Difference]: Start difference. First operand 5014 states and 10487 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:16,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:04:16,646 INFO L93 Difference]: Finished difference Result 5370 states and 11007 transitions. [2021-08-21 19:04:16,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:04:16,646 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:04:16,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:04:16,654 INFO L225 Difference]: With dead ends: 5370 [2021-08-21 19:04:16,654 INFO L226 Difference]: Without dead ends: 5365 [2021-08-21 19:04:16,654 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.6ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:04:16,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5365 states. [2021-08-21 19:04:16,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5365 to 4985. [2021-08-21 19:04:16,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4985 states, 4984 states have (on average 2.0884831460674156) internal successors, (10409), 4984 states have internal predecessors, (10409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:16,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4985 states to 4985 states and 10409 transitions. [2021-08-21 19:04:16,706 INFO L78 Accepts]: Start accepts. Automaton has 4985 states and 10409 transitions. Word has length 32 [2021-08-21 19:04:16,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:04:16,706 INFO L470 AbstractCegarLoop]: Abstraction has 4985 states and 10409 transitions. [2021-08-21 19:04:16,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:16,706 INFO L276 IsEmpty]: Start isEmpty. Operand 4985 states and 10409 transitions. [2021-08-21 19:04:16,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:04:16,711 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:04:16,711 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:04:16,743 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Ended with exit code 0 [2021-08-21 19:04:16,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2021-08-21 19:04:16,937 INFO L402 AbstractCegarLoop]: === Iteration 289 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 19:04:16,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:04:16,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1412802347, now seen corresponding path program 168 times [2021-08-21 19:04:16,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:04:16,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642646364] [2021-08-21 19:04:16,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:16,937 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:04:16,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:17,035 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:04:17,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:04:17,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642646364] [2021-08-21 19:04:17,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642646364] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:17,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504651872] [2021-08-21 19:04:17,035 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 19:04:17,035 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:17,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:04:17,036 INFO L229 MonitoredProcess]: Starting monitored process 274 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:04:17,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Waiting until timeout for monitored process [2021-08-21 19:04:22,442 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 19:04:22,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:04:22,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 19:04:22,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:04:22,603 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:04:22,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504651872] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:22,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:04:22,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 19:04:22,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022620287] [2021-08-21 19:04:22,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 19:04:22,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:04:22,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 19:04:22,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:04:22,604 INFO L87 Difference]: Start difference. First operand 4985 states and 10409 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:22,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:04:22,695 INFO L93 Difference]: Finished difference Result 5320 states and 10936 transitions. [2021-08-21 19:04:22,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:04:22,695 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:04:22,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:04:22,701 INFO L225 Difference]: With dead ends: 5320 [2021-08-21 19:04:22,701 INFO L226 Difference]: Without dead ends: 5311 [2021-08-21 19:04:22,701 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.5ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:04:22,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5311 states. [2021-08-21 19:04:22,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5311 to 4872. [2021-08-21 19:04:22,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4872 states, 4871 states have (on average 2.0819133648121535) internal successors, (10141), 4871 states have internal predecessors, (10141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:22,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4872 states to 4872 states and 10141 transitions. [2021-08-21 19:04:22,748 INFO L78 Accepts]: Start accepts. Automaton has 4872 states and 10141 transitions. Word has length 32 [2021-08-21 19:04:22,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:04:22,748 INFO L470 AbstractCegarLoop]: Abstraction has 4872 states and 10141 transitions. [2021-08-21 19:04:22,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:22,748 INFO L276 IsEmpty]: Start isEmpty. Operand 4872 states and 10141 transitions. [2021-08-21 19:04:22,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:04:22,753 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:04:22,753 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:04:22,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Forceful destruction successful, exit code 0 [2021-08-21 19:04:22,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2021-08-21 19:04:22,969 INFO L402 AbstractCegarLoop]: === Iteration 290 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 19:04:22,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:04:22,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1219896585, now seen corresponding path program 169 times [2021-08-21 19:04:22,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:04:22,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285290035] [2021-08-21 19:04:22,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:22,969 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:04:23,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:23,116 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:04:23,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:04:23,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285290035] [2021-08-21 19:04:23,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285290035] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:23,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999957952] [2021-08-21 19:04:23,116 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 19:04:23,116 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:23,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:04:23,117 INFO L229 MonitoredProcess]: Starting monitored process 275 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:04:23,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Waiting until timeout for monitored process [2021-08-21 19:04:28,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:28,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 19:04:28,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:04:28,580 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:04:28,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999957952] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:28,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:04:28,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 19:04:28,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482247989] [2021-08-21 19:04:28,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 19:04:28,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:04:28,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 19:04:28,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:04:28,581 INFO L87 Difference]: Start difference. First operand 4872 states and 10141 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:28,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:04:28,683 INFO L93 Difference]: Finished difference Result 5301 states and 10748 transitions. [2021-08-21 19:04:28,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:04:28,683 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:04:28,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:04:28,690 INFO L225 Difference]: With dead ends: 5301 [2021-08-21 19:04:28,690 INFO L226 Difference]: Without dead ends: 5296 [2021-08-21 19:04:28,690 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.2ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:04:28,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5296 states. [2021-08-21 19:04:28,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5296 to 4869. [2021-08-21 19:04:28,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4869 states, 4868 states have (on average 2.082580115036976) internal successors, (10138), 4868 states have internal predecessors, (10138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:28,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4869 states to 4869 states and 10138 transitions. [2021-08-21 19:04:28,738 INFO L78 Accepts]: Start accepts. Automaton has 4869 states and 10138 transitions. Word has length 32 [2021-08-21 19:04:28,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:04:28,738 INFO L470 AbstractCegarLoop]: Abstraction has 4869 states and 10138 transitions. [2021-08-21 19:04:28,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:28,738 INFO L276 IsEmpty]: Start isEmpty. Operand 4869 states and 10138 transitions. [2021-08-21 19:04:28,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:04:28,744 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:04:28,744 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:04:28,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Forceful destruction successful, exit code 0 [2021-08-21 19:04:28,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2021-08-21 19:04:28,951 INFO L402 AbstractCegarLoop]: === Iteration 291 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 19:04:28,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:04:28,952 INFO L82 PathProgramCache]: Analyzing trace with hash -628007347, now seen corresponding path program 26 times [2021-08-21 19:04:28,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:04:28,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019699893] [2021-08-21 19:04:28,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:28,952 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:04:28,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:29,048 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:04:29,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:04:29,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019699893] [2021-08-21 19:04:29,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019699893] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:29,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108751907] [2021-08-21 19:04:29,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:04:29,049 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:29,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:04:29,049 INFO L229 MonitoredProcess]: Starting monitored process 276 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:04:29,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Waiting until timeout for monitored process [2021-08-21 19:04:34,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:04:34,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:04:34,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 19:04:34,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:04:34,593 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:04:34,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108751907] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:34,593 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:04:34,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 19:04:34,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228530358] [2021-08-21 19:04:34,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 19:04:34,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:04:34,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 19:04:34,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:04:34,594 INFO L87 Difference]: Start difference. First operand 4869 states and 10138 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:34,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:04:34,675 INFO L93 Difference]: Finished difference Result 5312 states and 10845 transitions. [2021-08-21 19:04:34,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:04:34,675 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:04:34,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:04:34,681 INFO L225 Difference]: With dead ends: 5312 [2021-08-21 19:04:34,681 INFO L226 Difference]: Without dead ends: 5303 [2021-08-21 19:04:34,681 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.2ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:04:34,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5303 states. [2021-08-21 19:04:34,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5303 to 4906. [2021-08-21 19:04:34,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4906 states, 4905 states have (on average 2.0829765545361876) internal successors, (10217), 4905 states have internal predecessors, (10217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:34,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4906 states to 4906 states and 10217 transitions. [2021-08-21 19:04:34,729 INFO L78 Accepts]: Start accepts. Automaton has 4906 states and 10217 transitions. Word has length 32 [2021-08-21 19:04:34,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:04:34,729 INFO L470 AbstractCegarLoop]: Abstraction has 4906 states and 10217 transitions. [2021-08-21 19:04:34,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:34,730 INFO L276 IsEmpty]: Start isEmpty. Operand 4906 states and 10217 transitions. [2021-08-21 19:04:34,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:04:34,736 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:04:34,736 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:04:34,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Forceful destruction successful, exit code 0 [2021-08-21 19:04:34,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable290 [2021-08-21 19:04:34,961 INFO L402 AbstractCegarLoop]: === Iteration 292 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 19:04:34,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:04:34,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1413686277, now seen corresponding path program 170 times [2021-08-21 19:04:34,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:04:34,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819328632] [2021-08-21 19:04:34,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:34,961 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:04:34,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:35,058 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:04:35,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:04:35,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819328632] [2021-08-21 19:04:35,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819328632] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:35,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532450058] [2021-08-21 19:04:35,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:04:35,059 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:35,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:04:35,059 INFO L229 MonitoredProcess]: Starting monitored process 277 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:04:35,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Waiting until timeout for monitored process [2021-08-21 19:04:40,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:04:40,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:04:40,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 19:04:40,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:04:40,666 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:04:40,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532450058] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:40,666 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:04:40,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 19:04:40,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795269238] [2021-08-21 19:04:40,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 19:04:40,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:04:40,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 19:04:40,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:04:40,667 INFO L87 Difference]: Start difference. First operand 4906 states and 10217 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:40,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:04:40,756 INFO L93 Difference]: Finished difference Result 5317 states and 10761 transitions. [2021-08-21 19:04:40,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:04:40,756 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:04:40,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:04:40,762 INFO L225 Difference]: With dead ends: 5317 [2021-08-21 19:04:40,762 INFO L226 Difference]: Without dead ends: 5312 [2021-08-21 19:04:40,762 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.3ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:04:40,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5312 states. [2021-08-21 19:04:40,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5312 to 4893. [2021-08-21 19:04:40,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4893 states, 4892 states have (on average 2.081357318070319) internal successors, (10182), 4892 states have internal predecessors, (10182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:40,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4893 states to 4893 states and 10182 transitions. [2021-08-21 19:04:40,810 INFO L78 Accepts]: Start accepts. Automaton has 4893 states and 10182 transitions. Word has length 32 [2021-08-21 19:04:40,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:04:40,810 INFO L470 AbstractCegarLoop]: Abstraction has 4893 states and 10182 transitions. [2021-08-21 19:04:40,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:40,810 INFO L276 IsEmpty]: Start isEmpty. Operand 4893 states and 10182 transitions. [2021-08-21 19:04:40,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:04:40,816 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:04:40,816 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:04:40,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Forceful destruction successful, exit code 0 [2021-08-21 19:04:41,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,277 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:41,041 INFO L402 AbstractCegarLoop]: === Iteration 293 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 19:04:41,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:04:41,041 INFO L82 PathProgramCache]: Analyzing trace with hash -434217655, now seen corresponding path program 171 times [2021-08-21 19:04:41,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:04:41,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43595406] [2021-08-21 19:04:41,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:41,041 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:04:41,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:41,178 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:04:41,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:04:41,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43595406] [2021-08-21 19:04:41,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43595406] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:41,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850324828] [2021-08-21 19:04:41,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 19:04:41,178 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:41,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:04:41,179 INFO L229 MonitoredProcess]: Starting monitored process 278 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:04:41,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Waiting until timeout for monitored process [2021-08-21 19:04:46,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 19:04:46,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:04:46,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 19:04:46,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:04:46,807 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:04:46,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850324828] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:46,807 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:04:46,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 19:04:46,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279251808] [2021-08-21 19:04:46,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 19:04:46,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:04:46,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 19:04:46,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:04:46,808 INFO L87 Difference]: Start difference. First operand 4893 states and 10182 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:46,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:04:46,904 INFO L93 Difference]: Finished difference Result 5316 states and 10826 transitions. [2021-08-21 19:04:46,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:04:46,905 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:04:46,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:04:46,911 INFO L225 Difference]: With dead ends: 5316 [2021-08-21 19:04:46,911 INFO L226 Difference]: Without dead ends: 5307 [2021-08-21 19:04:46,911 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.0ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:04:46,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5307 states. [2021-08-21 19:04:46,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5307 to 4919. [2021-08-21 19:04:46,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4919 states, 4918 states have (on average 2.0835705571370475) internal successors, (10247), 4918 states have internal predecessors, (10247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:46,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4919 states to 4919 states and 10247 transitions. [2021-08-21 19:04:46,956 INFO L78 Accepts]: Start accepts. Automaton has 4919 states and 10247 transitions. Word has length 32 [2021-08-21 19:04:46,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:04:46,956 INFO L470 AbstractCegarLoop]: Abstraction has 4919 states and 10247 transitions. [2021-08-21 19:04:46,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:46,956 INFO L276 IsEmpty]: Start isEmpty. Operand 4919 states and 10247 transitions. [2021-08-21 19:04:46,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:04:46,961 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:04:46,962 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:04:46,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Forceful destruction successful, exit code 0 [2021-08-21 19:04:47,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2021-08-21 19:04:47,177 INFO L402 AbstractCegarLoop]: === Iteration 294 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 19:04:47,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:04:47,177 INFO L82 PathProgramCache]: Analyzing trace with hash 951280965, now seen corresponding path program 172 times [2021-08-21 19:04:47,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:04:47,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623811421] [2021-08-21 19:04:47,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:47,177 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:04:47,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:47,276 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:04:47,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:04:47,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623811421] [2021-08-21 19:04:47,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623811421] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:47,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688914794] [2021-08-21 19:04:47,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 19:04:47,276 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:47,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:04:47,277 INFO L229 MonitoredProcess]: Starting monitored process 279 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:04:47,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Waiting until timeout for monitored process [2021-08-21 19:04:52,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 19:04:52,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:04:52,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 19:04:52,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:04:52,865 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:04:52,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688914794] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:52,865 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:04:52,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 19:04:52,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813802521] [2021-08-21 19:04:52,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 19:04:52,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:04:52,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 19:04:52,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:04:52,866 INFO L87 Difference]: Start difference. First operand 4919 states and 10247 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:52,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:04:52,966 INFO L93 Difference]: Finished difference Result 5305 states and 10808 transitions. [2021-08-21 19:04:52,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:04:52,966 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:04:52,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:04:52,974 INFO L225 Difference]: With dead ends: 5305 [2021-08-21 19:04:52,974 INFO L226 Difference]: Without dead ends: 5300 [2021-08-21 19:04:52,974 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.7ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:04:52,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5300 states. [2021-08-21 19:04:53,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5300 to 4918. [2021-08-21 19:04:53,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4918 states, 4917 states have (on average 2.083180801301607) internal successors, (10243), 4917 states have internal predecessors, (10243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:53,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4918 states to 4918 states and 10243 transitions. [2021-08-21 19:04:53,031 INFO L78 Accepts]: Start accepts. Automaton has 4918 states and 10243 transitions. Word has length 32 [2021-08-21 19:04:53,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:04:53,031 INFO L470 AbstractCegarLoop]: Abstraction has 4918 states and 10243 transitions. [2021-08-21 19:04:53,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:53,032 INFO L276 IsEmpty]: Start isEmpty. Operand 4918 states and 10243 transitions. [2021-08-21 19:04:53,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:04:53,039 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:04:53,039 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:04:53,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Forceful destruction successful, exit code 0 [2021-08-21 19:04:53,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 279 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable293 [2021-08-21 19:04:53,253 INFO L402 AbstractCegarLoop]: === Iteration 295 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 19:04:53,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:04:53,253 INFO L82 PathProgramCache]: Analyzing trace with hash -94853943, now seen corresponding path program 173 times [2021-08-21 19:04:53,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:04:53,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105455717] [2021-08-21 19:04:53,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:53,253 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:04:53,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:53,355 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:04:53,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:04:53,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105455717] [2021-08-21 19:04:53,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105455717] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:53,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059811642] [2021-08-21 19:04:53,355 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 19:04:53,355 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:53,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:04:53,356 INFO L229 MonitoredProcess]: Starting monitored process 280 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:04:53,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Waiting until timeout for monitored process [2021-08-21 19:04:58,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:04:58,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:04:58,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 19:04:58,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:04:59,082 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:04:59,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059811642] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:59,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:04:59,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 19:04:59,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207144585] [2021-08-21 19:04:59,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 19:04:59,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:04:59,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 19:04:59,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:04:59,083 INFO L87 Difference]: Start difference. First operand 4918 states and 10243 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:59,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:04:59,189 INFO L93 Difference]: Finished difference Result 5258 states and 10728 transitions. [2021-08-21 19:04:59,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:04:59,189 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:04:59,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:04:59,195 INFO L225 Difference]: With dead ends: 5258 [2021-08-21 19:04:59,195 INFO L226 Difference]: Without dead ends: 5253 [2021-08-21 19:04:59,195 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.2ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:04:59,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5253 states. [2021-08-21 19:04:59,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5253 to 4917. [2021-08-21 19:04:59,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4917 states, 4916 states have (on average 2.0823840520748575) internal successors, (10237), 4916 states have internal predecessors, (10237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:59,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4917 states to 4917 states and 10237 transitions. [2021-08-21 19:04:59,265 INFO L78 Accepts]: Start accepts. Automaton has 4917 states and 10237 transitions. Word has length 32 [2021-08-21 19:04:59,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:04:59,265 INFO L470 AbstractCegarLoop]: Abstraction has 4917 states and 10237 transitions. [2021-08-21 19:04:59,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:59,266 INFO L276 IsEmpty]: Start isEmpty. Operand 4917 states and 10237 transitions. [2021-08-21 19:04:59,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:04:59,271 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:04:59,271 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:04:59,305 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Ended with exit code 0 [2021-08-21 19:04:59,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,280 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:59,497 INFO L402 AbstractCegarLoop]: === Iteration 296 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 19:04:59,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:04:59,497 INFO L82 PathProgramCache]: Analyzing trace with hash -137310775, now seen corresponding path program 174 times [2021-08-21 19:04:59,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:04:59,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460997581] [2021-08-21 19:04:59,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:59,497 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:04:59,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:59,595 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:04:59,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:04:59,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460997581] [2021-08-21 19:04:59,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460997581] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:59,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496158662] [2021-08-21 19:04:59,596 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 19:04:59,596 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:59,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:04:59,596 INFO L229 MonitoredProcess]: Starting monitored process 281 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:04:59,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Waiting until timeout for monitored process [2021-08-21 19:05:05,273 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 19:05:05,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:05:05,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 19:05:05,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:05:05,434 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:05:05,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496158662] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:05:05,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:05:05,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 19:05:05,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249690646] [2021-08-21 19:05:05,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 19:05:05,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:05:05,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 19:05:05,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:05:05,435 INFO L87 Difference]: Start difference. First operand 4917 states and 10237 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:05:05,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:05:05,533 INFO L93 Difference]: Finished difference Result 5852 states and 11967 transitions. [2021-08-21 19:05:05,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:05:05,533 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:05:05,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:05:05,544 INFO L225 Difference]: With dead ends: 5852 [2021-08-21 19:05:05,544 INFO L226 Difference]: Without dead ends: 5819 [2021-08-21 19:05:05,544 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.7ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:05:05,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5819 states. [2021-08-21 19:05:05,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5819 to 5322. [2021-08-21 19:05:05,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5322 states, 5321 states have (on average 2.083630896448036) internal successors, (11087), 5321 states have internal predecessors, (11087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:05:05,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5322 states to 5322 states and 11087 transitions. [2021-08-21 19:05:05,630 INFO L78 Accepts]: Start accepts. Automaton has 5322 states and 11087 transitions. Word has length 32 [2021-08-21 19:05:05,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:05:05,631 INFO L470 AbstractCegarLoop]: Abstraction has 5322 states and 11087 transitions. [2021-08-21 19:05:05,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:05:05,631 INFO L276 IsEmpty]: Start isEmpty. Operand 5322 states and 11087 transitions. [2021-08-21 19:05:05,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:05:05,639 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:05:05,639 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:05:05,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Forceful destruction successful, exit code 0 [2021-08-21 19:05:05,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,281 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:05:05,853 INFO L402 AbstractCegarLoop]: === Iteration 297 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 19:05:05,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:05:05,853 INFO L82 PathProgramCache]: Analyzing trace with hash -354471811, now seen corresponding path program 175 times [2021-08-21 19:05:05,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:05:05,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971845422] [2021-08-21 19:05:05,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:05:05,853 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:05:05,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:05:05,964 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:05:05,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:05:05,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971845422] [2021-08-21 19:05:05,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971845422] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:05:05,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931871616] [2021-08-21 19:05:05,965 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 19:05:05,965 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:05:05,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:05:05,965 INFO L229 MonitoredProcess]: Starting monitored process 282 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:05:05,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Waiting until timeout for monitored process [2021-08-21 19:05:11,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:05:11,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 19:05:11,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:05:11,749 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:05:11,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931871616] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:05:11,749 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:05:11,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 19:05:11,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172533505] [2021-08-21 19:05:11,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 19:05:11,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:05:11,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 19:05:11,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:05:11,750 INFO L87 Difference]: Start difference. First operand 5322 states and 11087 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:05:11,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:05:11,846 INFO L93 Difference]: Finished difference Result 5705 states and 11597 transitions. [2021-08-21 19:05:11,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:05:11,846 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:05:11,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:05:11,853 INFO L225 Difference]: With dead ends: 5705 [2021-08-21 19:05:11,853 INFO L226 Difference]: Without dead ends: 5700 [2021-08-21 19:05:11,853 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.8ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:05:11,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5700 states. [2021-08-21 19:05:11,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5700 to 5340. [2021-08-21 19:05:11,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5340 states, 5339 states have (on average 2.0848473496909534) internal successors, (11131), 5339 states have internal predecessors, (11131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:05:11,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5340 states to 5340 states and 11131 transitions. [2021-08-21 19:05:11,923 INFO L78 Accepts]: Start accepts. Automaton has 5340 states and 11131 transitions. Word has length 32 [2021-08-21 19:05:11,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:05:11,923 INFO L470 AbstractCegarLoop]: Abstraction has 5340 states and 11131 transitions. [2021-08-21 19:05:11,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:05:11,923 INFO L276 IsEmpty]: Start isEmpty. Operand 5340 states and 11131 transitions. [2021-08-21 19:05:11,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:05:11,929 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:05:11,929 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:05:11,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Forceful destruction successful, exit code 0 [2021-08-21 19:05:12,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,282 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:05:12,145 INFO L402 AbstractCegarLoop]: === Iteration 298 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 19:05:12,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:05:12,145 INFO L82 PathProgramCache]: Analyzing trace with hash 2092591553, now seen corresponding path program 27 times [2021-08-21 19:05:12,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:05:12,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799802043] [2021-08-21 19:05:12,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:05:12,145 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:05:12,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:05:12,297 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:05:12,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:05:12,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799802043] [2021-08-21 19:05:12,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799802043] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:05:12,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499219081] [2021-08-21 19:05:12,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 19:05:12,298 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:05:12,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:05:12,299 INFO L229 MonitoredProcess]: Starting monitored process 283 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:05:12,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Waiting until timeout for monitored process [2021-08-21 19:05:17,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 19:05:17,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:05:17,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 19:05:17,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:05:18,163 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:05:18,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499219081] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:05:18,164 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:05:18,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 19:05:18,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364117356] [2021-08-21 19:05:18,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 19:05:18,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:05:18,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 19:05:18,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:05:18,164 INFO L87 Difference]: Start difference. First operand 5340 states and 11131 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:05:18,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:05:18,257 INFO L93 Difference]: Finished difference Result 5752 states and 11763 transitions. [2021-08-21 19:05:18,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:05:18,257 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:05:18,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:05:18,266 INFO L225 Difference]: With dead ends: 5752 [2021-08-21 19:05:18,266 INFO L226 Difference]: Without dead ends: 5743 [2021-08-21 19:05:18,266 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 61.6ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:05:18,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5743 states. [2021-08-21 19:05:18,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5743 to 5413. [2021-08-21 19:05:18,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5413 states, 5412 states have (on average 2.0833333333333335) internal successors, (11275), 5412 states have internal predecessors, (11275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:05:18,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5413 states to 5413 states and 11275 transitions. [2021-08-21 19:05:18,328 INFO L78 Accepts]: Start accepts. Automaton has 5413 states and 11275 transitions. Word has length 32 [2021-08-21 19:05:18,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:05:18,328 INFO L470 AbstractCegarLoop]: Abstraction has 5413 states and 11275 transitions. [2021-08-21 19:05:18,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:05:18,328 INFO L276 IsEmpty]: Start isEmpty. Operand 5413 states and 11275 transitions. [2021-08-21 19:05:18,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:05:18,335 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:05:18,335 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:05:18,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Forceful destruction successful, exit code 0 [2021-08-21 19:05:18,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable297 [2021-08-21 19:05:18,561 INFO L402 AbstractCegarLoop]: === Iteration 299 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 19:05:18,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:05:18,561 INFO L82 PathProgramCache]: Analyzing trace with hash -160682119, now seen corresponding path program 176 times [2021-08-21 19:05:18,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:05:18,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807265203] [2021-08-21 19:05:18,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:05:18,561 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:05:18,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:05:18,678 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:05:18,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:05:18,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807265203] [2021-08-21 19:05:18,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807265203] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:05:18,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226119757] [2021-08-21 19:05:18,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:05:18,678 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:05:18,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:05:18,679 INFO L229 MonitoredProcess]: Starting monitored process 284 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:05:18,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Waiting until timeout for monitored process Received shutdown request... [2021-08-21 19:05:21,399 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 19:05:21,399 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 19:05:22,412 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 19:05:22,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Ended with exit code 0 [2021-08-21 19:05:22,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 [2021-08-21 19:05:22,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2021-08-21 19:05:22,614 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 33 with TraceHistMax 2,while executing Executor. [2021-08-21 19:05:22,615 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 19:05:22,615 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 19:05:22,615 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-21 19:05:22,615 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3INUSE_VIOLATION [2021-08-21 19:05:22,618 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 19:05:22,618 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 19:05:22,621 INFO L202 PluginConnector]: Adding new model add-sub04.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 07:05:22 BasicIcfg [2021-08-21 19:05:22,621 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 19:05:22,637 INFO L168 Benchmark]: Toolchain (without parser) took 915237.75 ms. Allocated memory was 154.1 MB in the beginning and 3.2 GB in the end (delta: 3.0 GB). Free memory was 134.5 MB in the beginning and 2.1 GB in the end (delta: -2.0 GB). Peak memory consumption was 1.1 GB. Max. memory is 8.0 GB. [2021-08-21 19:05:22,638 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.40 ms. Allocated memory is still 154.1 MB. Free memory is still 135.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 19:05:22,638 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.52 ms. Allocated memory is still 154.1 MB. Free memory was 134.4 MB in the beginning and 132.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 19:05:22,639 INFO L168 Benchmark]: Boogie Preprocessor took 11.93 ms. Allocated memory is still 154.1 MB. Free memory was 132.9 MB in the beginning and 132.0 MB in the end (delta: 940.7 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 19:05:22,639 INFO L168 Benchmark]: RCFGBuilder took 173.03 ms. Allocated memory is still 154.1 MB. Free memory was 132.0 MB in the beginning and 122.9 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-08-21 19:05:22,643 INFO L168 Benchmark]: TraceAbstraction took 915027.71 ms. Allocated memory was 154.1 MB in the beginning and 3.2 GB in the end (delta: 3.0 GB). Free memory was 122.4 MB in the beginning and 2.1 GB in the end (delta: -2.0 GB). Peak memory consumption was 1.1 GB. Max. memory is 8.0 GB. [2021-08-21 19:05:22,646 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 0.40 ms. Allocated memory is still 154.1 MB. Free memory is still 135.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 20.52 ms. Allocated memory is still 154.1 MB. Free memory was 134.4 MB in the beginning and 132.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 11.93 ms. Allocated memory is still 154.1 MB. Free memory was 132.9 MB in the beginning and 132.0 MB in the end (delta: 940.7 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 173.03 ms. Allocated memory is still 154.1 MB. Free memory was 132.0 MB in the beginning and 122.9 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 915027.71 ms. Allocated memory was 154.1 MB in the beginning and 3.2 GB in the end (delta: 3.0 GB). Free memory was 122.4 MB in the beginning and 2.1 GB in the end (delta: -2.0 GB). Peak memory consumption was 1.1 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: 1520, positive: 1408, positive conditional: 1408, positive unconditional: 0, negative: 112, negative conditional: 112, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 1408, positive: 1408, positive conditional: 0, positive unconditional: 1408, 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: 144, positive: 144, positive conditional: 0, positive unconditional: 144, 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: 144, positive: 120, positive conditional: 0, positive unconditional: 120, negative: 24, negative conditional: 0, negative unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 24, positive: 24, positive conditional: 0, positive unconditional: 24, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 130, positive: 130, positive conditional: 0, positive unconditional: 130, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1408, positive: 1264, positive conditional: 0, positive unconditional: 1264, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 144, unknown conditional: 0, unknown unconditional: 144] , Statistics on independence cache: Total cache size (in pairs): 144, Positive cache size: 144, Positive conditional cache size: 0, Positive unconditional cache size: 144, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Independence queries for same thread: 112 - 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: 18]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 33 with TraceHistMax 2,while executing Executor. - TimeoutResultAtElement [Line: 11]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 33 with TraceHistMax 2,while executing Executor. - TimeoutResultAtElement [Line: 9]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 33 with TraceHistMax 2,while executing Executor. - TimeoutResultAtElement [Line: 9]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 33 with TraceHistMax 2,while executing Executor. - TimeoutResultAtElement [Line: 10]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 33 with TraceHistMax 2,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 6 procedures, 37 locations, 5 error locations. Started 1 CEGAR loops. OverallTime: 914892.9ms, OverallIterations: 299, TraceHistogramMax: 3, EmptinessCheckTime: 1034.0ms, AutomataDifference: 23881.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 292.8ms, PartialOrderReductionTime: 277.3ms, HoareTripleCheckerStatistics: 7937 SDtfs, 1665 SDslu, 28442 SDs, 0 SdLazy, 41137 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 15057.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10758 GetRequests, 8503 SyntacticMatches, 579 SemanticMatches, 1676 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10390.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=5413occurred in iteration=298, InterpolantAutomatonStates: 2272, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 9363.0ms AutomataMinimizationTime, 298 MinimizatonAttempts, 74562 StatesRemovedByMinimization, 298 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1029.7ms SsaConstructionTime, 3855.0ms SatisfiabilityAnalysisTime, 61193.5ms InterpolantComputationTime, 16292 NumberOfCodeBlocks, 16292 NumberOfCodeBlocksAsserted, 846 NumberOfCheckSat, 15712 ConstructedInterpolants, 0 QuantifiedInterpolants, 118568 SizeOfPredicates, 0 NumberOfNonLiveVariables, 20548 ConjunctsInSsa, 6230 ConjunctsInUnsatCore, 580 InterpolantComputations, 16 PerfectInterpolantSequences, 1386/4854 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