/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp3x3-opt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 12:12:16,398 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 12:12:16,401 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 12:12:16,442 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-21 12:12:16,442 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-21 12:12:16,445 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-21 12:12:16,447 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-21 12:12:16,452 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-21 12:12:16,454 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-21 12:12:16,461 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-21 12:12:16,462 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-21 12:12:16,463 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-21 12:12:16,464 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-21 12:12:16,465 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-21 12:12:16,467 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-21 12:12:16,470 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-21 12:12:16,470 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-21 12:12:16,471 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-21 12:12:16,472 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-21 12:12:16,479 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-21 12:12:16,480 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-21 12:12:16,483 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-21 12:12:16,484 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-21 12:12:16,487 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-21 12:12:16,492 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-21 12:12:16,492 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-21 12:12:16,493 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-21 12:12:16,493 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-21 12:12:16,494 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-21 12:12:16,494 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-21 12:12:16,494 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-21 12:12:16,495 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-21 12:12:16,496 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-21 12:12:16,496 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-21 12:12:16,497 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-21 12:12:16,497 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-21 12:12:16,498 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-21 12:12:16,498 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-21 12:12:16,498 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 12:12:16,499 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 12:12:16,499 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 12:12:16,504 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-08-21 12:12:16,530 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 12:12:16,530 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 12:12:16,531 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-21 12:12:16,531 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-21 12:12:16,532 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 12:12:16,532 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 12:12:16,532 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 12:12:16,535 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 12:12:16,535 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 12:12:16,535 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 12:12:16,536 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 12:12:16,536 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 12:12:16,536 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 12:12:16,536 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 12:12:16,536 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 12:12:16,537 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 12:12:16,537 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 12:12:16,537 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 12:12:16,537 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 12:12:16,537 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 12:12:16,537 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 12:12:16,537 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 12:12:16,538 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 12:12:16,538 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 12:12:16,538 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 12:12:16,538 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 12:12:16,538 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 12:12:16,538 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 12:12:16,539 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 12:12:16,539 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 12:12:16,539 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 12:12:16,539 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 12:12:16,868 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 12:12:16,891 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 12:12:16,893 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 12:12:16,895 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 12:12:16,897 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 12:12:16,897 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp3x3-opt.wvr.bpl [2021-08-21 12:12:16,898 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp3x3-opt.wvr.bpl' [2021-08-21 12:12:17,055 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 12:12:17,056 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 12:12:17,057 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 12:12:17,057 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 12:12:17,058 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 12:12:17,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:12:17" (1/1) ... [2021-08-21 12:12:17,074 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:12:17" (1/1) ... [2021-08-21 12:12:17,082 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 12:12:17,083 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 12:12:17,084 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 12:12:17,085 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 12:12:17,091 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:12:17" (1/1) ... [2021-08-21 12:12:17,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:12:17" (1/1) ... [2021-08-21 12:12:17,099 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:12:17" (1/1) ... [2021-08-21 12:12:17,100 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:12:17" (1/1) ... [2021-08-21 12:12:17,105 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:12:17" (1/1) ... [2021-08-21 12:12:17,110 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:12:17" (1/1) ... [2021-08-21 12:12:17,114 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:12:17" (1/1) ... [2021-08-21 12:12:17,115 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 12:12:17,116 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 12:12:17,116 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 12:12:17,116 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 12:12:17,119 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:12:17" (1/1) ... [2021-08-21 12:12:17,125 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 12:12:17,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:17,146 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 12:12:17,172 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 12:12:17,187 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 12:12:17,187 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 12:12:17,187 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 12:12:17,188 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 12:12:17,188 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 12:12:17,188 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 12:12:17,188 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 12:12:17,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 12:12:17,188 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 12:12:17,189 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-21 12:12:17,190 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-21 12:12:17,190 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-21 12:12:17,190 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-08-21 12:12:17,190 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-08-21 12:12:17,190 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-08-21 12:12:17,190 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2021-08-21 12:12:17,190 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2021-08-21 12:12:17,190 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2021-08-21 12:12:17,191 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread6 given in one single declaration [2021-08-21 12:12:17,191 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2021-08-21 12:12:17,192 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2021-08-21 12:12:17,194 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 12:12:17,377 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 12:12:17,378 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-08-21 12:12:17,378 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-08-21 12:12:17,379 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-08-21 12:12:17,379 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-08-21 12:12:17,379 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread4EXIT is neither atomic block end nor error location. [2021-08-21 12:12:17,379 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread5EXIT is neither atomic block end nor error location. [2021-08-21 12:12:17,380 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread6EXIT is neither atomic block end nor error location. [2021-08-21 12:12:17,381 INFO L202 PluginConnector]: Adding new model exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 12:12:17 BoogieIcfgContainer [2021-08-21 12:12:17,381 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 12:12:17,383 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 12:12:17,383 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 12:12:17,386 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 12:12:17,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:12:17" (1/2) ... [2021-08-21 12:12:17,387 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aed030a and model type exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 12:12:17, skipping insertion in model container [2021-08-21 12:12:17,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 12:12:17" (2/2) ... [2021-08-21 12:12:17,388 INFO L111 eAbstractionObserver]: Analyzing ICFG exp3x3-opt.wvr.bpl [2021-08-21 12:12:17,393 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 12:12:17,393 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 12:12:17,393 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 12:12:17,393 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 12:12:17,519 INFO L148 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2021-08-21 12:12:17,553 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 12:12:17,559 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 12:12:17,559 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-08-21 12:12:17,569 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 48 places, 35 transitions, 118 flow [2021-08-21 12:12:17,627 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 193 states, 192 states have (on average 5.359375) internal successors, (1029), 192 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:17,631 INFO L276 IsEmpty]: Start isEmpty. Operand has 193 states, 192 states have (on average 5.359375) internal successors, (1029), 192 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:17,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:12:17,643 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:17,643 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:12:17,644 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:12:17,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:17,651 INFO L82 PathProgramCache]: Analyzing trace with hash -931305045, now seen corresponding path program 1 times [2021-08-21 12:12:17,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:17,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692761749] [2021-08-21 12:12:17,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:17,659 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:17,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:17,871 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 12:12:17,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:17,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692761749] [2021-08-21 12:12:17,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692761749] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:12:17,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:12:17,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 12:12:17,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399535605] [2021-08-21 12:12:17,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 12:12:17,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:17,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 12:12:17,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 12:12:17,894 INFO L87 Difference]: Start difference. First operand has 193 states, 192 states have (on average 5.359375) internal successors, (1029), 192 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:17,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:17,944 INFO L93 Difference]: Finished difference Result 352 states and 1926 transitions. [2021-08-21 12:12:17,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 12:12:17,946 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:12:17,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:17,965 INFO L225 Difference]: With dead ends: 352 [2021-08-21 12:12:17,966 INFO L226 Difference]: Without dead ends: 319 [2021-08-21 12:12:17,968 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 12:12:17,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-08-21 12:12:18,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2021-08-21 12:12:18,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 5.49685534591195) internal successors, (1748), 318 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:18,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 1748 transitions. [2021-08-21 12:12:18,058 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 1748 transitions. Word has length 21 [2021-08-21 12:12:18,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:18,059 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 1748 transitions. [2021-08-21 12:12:18,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:18,059 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 1748 transitions. [2021-08-21 12:12:18,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 12:12:18,063 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:18,063 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:12:18,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 12:12:18,064 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:12:18,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:18,067 INFO L82 PathProgramCache]: Analyzing trace with hash -976021450, now seen corresponding path program 1 times [2021-08-21 12:12:18,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:18,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832914946] [2021-08-21 12:12:18,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:18,067 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:18,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:18,138 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 12:12:18,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:18,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832914946] [2021-08-21 12:12:18,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832914946] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:12:18,139 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:12:18,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 12:12:18,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515491327] [2021-08-21 12:12:18,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 12:12:18,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:18,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 12:12:18,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 12:12:18,145 INFO L87 Difference]: Start difference. First operand 319 states and 1748 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:18,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:18,169 INFO L93 Difference]: Finished difference Result 628 states and 3476 transitions. [2021-08-21 12:12:18,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 12:12:18,170 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 12:12:18,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:18,177 INFO L225 Difference]: With dead ends: 628 [2021-08-21 12:12:18,177 INFO L226 Difference]: Without dead ends: 541 [2021-08-21 12:12:18,178 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 12:12:18,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-08-21 12:12:18,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 541. [2021-08-21 12:12:18,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 540 states have (on average 5.587037037037037) internal successors, (3017), 540 states have internal predecessors, (3017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:18,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 3017 transitions. [2021-08-21 12:12:18,211 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 3017 transitions. Word has length 22 [2021-08-21 12:12:18,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:18,211 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 3017 transitions. [2021-08-21 12:12:18,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:18,211 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 3017 transitions. [2021-08-21 12:12:18,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:12:18,219 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:18,219 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 12:12:18,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 12:12:18,220 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:12:18,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:18,221 INFO L82 PathProgramCache]: Analyzing trace with hash 93496637, now seen corresponding path program 1 times [2021-08-21 12:12:18,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:18,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080159027] [2021-08-21 12:12:18,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:18,222 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:18,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:18,272 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 12:12:18,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:18,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080159027] [2021-08-21 12:12:18,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080159027] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:12:18,275 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:12:18,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 12:12:18,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857700339] [2021-08-21 12:12:18,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 12:12:18,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:18,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 12:12:18,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 12:12:18,286 INFO L87 Difference]: Start difference. First operand 541 states and 3017 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 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 12:12:18,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:18,317 INFO L93 Difference]: Finished difference Result 1078 states and 6030 transitions. [2021-08-21 12:12:18,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 12:12:18,318 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 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 12:12:18,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:18,330 INFO L225 Difference]: With dead ends: 1078 [2021-08-21 12:12:18,330 INFO L226 Difference]: Without dead ends: 859 [2021-08-21 12:12:18,331 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 12:12:18,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2021-08-21 12:12:18,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 859. [2021-08-21 12:12:18,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 5.6678321678321675) internal successors, (4863), 858 states have internal predecessors, (4863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:18,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 4863 transitions. [2021-08-21 12:12:18,374 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 4863 transitions. Word has length 23 [2021-08-21 12:12:18,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:18,374 INFO L470 AbstractCegarLoop]: Abstraction has 859 states and 4863 transitions. [2021-08-21 12:12:18,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 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 12:12:18,375 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 4863 transitions. [2021-08-21 12:12:18,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 12:12:18,379 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:18,379 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:12:18,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 12:12:18,380 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:12:18,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:18,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1806147054, now seen corresponding path program 1 times [2021-08-21 12:12:18,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:18,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772341553] [2021-08-21 12:12:18,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:18,383 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:18,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:18,440 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 12:12:18,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:18,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772341553] [2021-08-21 12:12:18,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772341553] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:18,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539757562] [2021-08-21 12:12:18,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:18,442 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:18,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:18,443 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 12:12:18,444 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 12:12:18,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:18,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-21 12:12:18,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:18,706 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 12:12:18,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539757562] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:18,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:18,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-08-21 12:12:18,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410808163] [2021-08-21 12:12:18,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:12:18,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:18,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:12:18,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:12:18,708 INFO L87 Difference]: Start difference. First operand 859 states and 4863 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:18,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:18,840 INFO L93 Difference]: Finished difference Result 1936 states and 10970 transitions. [2021-08-21 12:12:18,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:12:18,841 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 12:12:18,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:18,850 INFO L225 Difference]: With dead ends: 1936 [2021-08-21 12:12:18,850 INFO L226 Difference]: Without dead ends: 922 [2021-08-21 12:12:18,851 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 38.3ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:12:18,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2021-08-21 12:12:18,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 610. [2021-08-21 12:12:18,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 609 states have (on average 5.600985221674877) internal successors, (3411), 609 states have internal predecessors, (3411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:18,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 3411 transitions. [2021-08-21 12:12:18,876 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 3411 transitions. Word has length 24 [2021-08-21 12:12:18,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:18,877 INFO L470 AbstractCegarLoop]: Abstraction has 610 states and 3411 transitions. [2021-08-21 12:12:18,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:18,877 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 3411 transitions. [2021-08-21 12:12:18,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 12:12:18,879 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:18,879 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:12:18,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-21 12:12:19,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:19,103 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:12:19,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:19,104 INFO L82 PathProgramCache]: Analyzing trace with hash 860655352, now seen corresponding path program 1 times [2021-08-21 12:12:19,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:19,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66665054] [2021-08-21 12:12:19,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:19,104 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:19,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:19,148 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 12:12:19,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:19,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66665054] [2021-08-21 12:12:19,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66665054] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:19,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052802630] [2021-08-21 12:12:19,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:19,149 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:19,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:19,150 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 12:12:19,172 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 12:12:19,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:19,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-21 12:12:19,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:19,324 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 12:12:19,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052802630] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:19,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:19,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-08-21 12:12:19,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254060448] [2021-08-21 12:12:19,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:12:19,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:19,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:12:19,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:12:19,328 INFO L87 Difference]: Start difference. First operand 610 states and 3411 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:19,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:19,515 INFO L93 Difference]: Finished difference Result 2023 states and 11454 transitions. [2021-08-21 12:12:19,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:12:19,516 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 12:12:19,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:19,529 INFO L225 Difference]: With dead ends: 2023 [2021-08-21 12:12:19,529 INFO L226 Difference]: Without dead ends: 1163 [2021-08-21 12:12:19,530 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 37.4ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:12:19,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2021-08-21 12:12:19,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 1163. [2021-08-21 12:12:19,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1163 states, 1162 states have (on average 5.699655765920826) internal successors, (6623), 1162 states have internal predecessors, (6623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:19,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 6623 transitions. [2021-08-21 12:12:19,598 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 6623 transitions. Word has length 24 [2021-08-21 12:12:19,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:19,598 INFO L470 AbstractCegarLoop]: Abstraction has 1163 states and 6623 transitions. [2021-08-21 12:12:19,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:19,599 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 6623 transitions. [2021-08-21 12:12:19,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 12:12:19,604 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:19,604 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 12:12:19,631 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 12:12:19,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:19,821 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:12:19,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:19,822 INFO L82 PathProgramCache]: Analyzing trace with hash -103790194, now seen corresponding path program 1 times [2021-08-21 12:12:19,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:19,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617287722] [2021-08-21 12:12:19,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:19,822 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:19,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:19,867 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 12:12:19,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:19,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617287722] [2021-08-21 12:12:19,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617287722] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:19,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458663066] [2021-08-21 12:12:19,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:19,868 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:19,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:19,869 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 12:12:19,871 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 12:12:19,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:19,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-21 12:12:19,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:20,030 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 12:12:20,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458663066] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:20,030 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:20,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-08-21 12:12:20,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067699187] [2021-08-21 12:12:20,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:12:20,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:20,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:12:20,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:12:20,032 INFO L87 Difference]: Start difference. First operand 1163 states and 6623 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:20,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:20,074 INFO L93 Difference]: Finished difference Result 1806 states and 10329 transitions. [2021-08-21 12:12:20,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 12:12:20,074 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 12:12:20,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:20,087 INFO L225 Difference]: With dead ends: 1806 [2021-08-21 12:12:20,087 INFO L226 Difference]: Without dead ends: 1298 [2021-08-21 12:12:20,087 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.9ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:12:20,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1298 states. [2021-08-21 12:12:20,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1298 to 992. [2021-08-21 12:12:20,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 991 states have (on average 5.702320887991927) internal successors, (5651), 991 states have internal predecessors, (5651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:20,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 5651 transitions. [2021-08-21 12:12:20,130 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 5651 transitions. Word has length 26 [2021-08-21 12:12:20,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:20,131 INFO L470 AbstractCegarLoop]: Abstraction has 992 states and 5651 transitions. [2021-08-21 12:12:20,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:20,131 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 5651 transitions. [2021-08-21 12:12:20,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 12:12:20,135 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:20,135 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 12:12:20,161 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 12:12:20,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:20,353 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:12:20,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:20,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1915665608, now seen corresponding path program 1 times [2021-08-21 12:12:20,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:20,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028158773] [2021-08-21 12:12:20,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:20,354 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:20,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:20,388 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 12:12:20,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:20,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028158773] [2021-08-21 12:12:20,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028158773] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:20,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786179508] [2021-08-21 12:12:20,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:20,389 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:20,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:20,390 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 12:12:20,390 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 12:12:20,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:20,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-21 12:12:20,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:20,629 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 12:12:20,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786179508] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:20,629 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:20,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-08-21 12:12:20,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775488301] [2021-08-21 12:12:20,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:12:20,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:20,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:12:20,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:12:20,632 INFO L87 Difference]: Start difference. First operand 992 states and 5651 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:20,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:20,679 INFO L93 Difference]: Finished difference Result 1941 states and 11157 transitions. [2021-08-21 12:12:20,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 12:12:20,679 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 12:12:20,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:20,696 INFO L225 Difference]: With dead ends: 1941 [2021-08-21 12:12:20,696 INFO L226 Difference]: Without dead ends: 1460 [2021-08-21 12:12:20,696 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.2ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:12:20,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2021-08-21 12:12:20,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1460. [2021-08-21 12:12:20,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1459 states have (on average 5.748457847840987) internal successors, (8387), 1459 states have internal predecessors, (8387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:20,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 8387 transitions. [2021-08-21 12:12:20,757 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 8387 transitions. Word has length 26 [2021-08-21 12:12:20,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:20,757 INFO L470 AbstractCegarLoop]: Abstraction has 1460 states and 8387 transitions. [2021-08-21 12:12:20,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:20,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 8387 transitions. [2021-08-21 12:12:20,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 12:12:20,764 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:20,764 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:12:20,788 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 12:12:20,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:20,977 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:12:20,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:20,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1029298811, now seen corresponding path program 1 times [2021-08-21 12:12:20,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:20,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413514607] [2021-08-21 12:12:20,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:20,978 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:20,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:21,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 12:12:21,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:21,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413514607] [2021-08-21 12:12:21,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413514607] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:21,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084167904] [2021-08-21 12:12:21,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:21,036 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:21,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:21,037 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 12:12:21,052 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 12:12:21,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:21,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:12:21,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:21,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 12:12:21,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084167904] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:21,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:21,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 6 [2021-08-21 12:12:21,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917656280] [2021-08-21 12:12:21,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:12:21,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:21,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:12:21,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:12:21,447 INFO L87 Difference]: Start difference. First operand 1460 states and 8387 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:21,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:21,658 INFO L93 Difference]: Finished difference Result 6508 states and 37469 transitions. [2021-08-21 12:12:21,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:12:21,659 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 12:12:21,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:21,708 INFO L225 Difference]: With dead ends: 6508 [2021-08-21 12:12:21,708 INFO L226 Difference]: Without dead ends: 5595 [2021-08-21 12:12:21,709 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 84.0ms TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:12:21,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5595 states. [2021-08-21 12:12:21,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5595 to 3403. [2021-08-21 12:12:21,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3403 states, 3402 states have (on average 6.304526748971194) internal successors, (21448), 3402 states have internal predecessors, (21448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:21,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3403 states to 3403 states and 21448 transitions. [2021-08-21 12:12:21,957 INFO L78 Accepts]: Start accepts. Automaton has 3403 states and 21448 transitions. Word has length 27 [2021-08-21 12:12:21,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:21,957 INFO L470 AbstractCegarLoop]: Abstraction has 3403 states and 21448 transitions. [2021-08-21 12:12:21,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:21,957 INFO L276 IsEmpty]: Start isEmpty. Operand 3403 states and 21448 transitions. [2021-08-21 12:12:22,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 12:12:22,003 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:22,003 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:12:22,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-21 12:12:22,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:22,204 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:12:22,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:22,205 INFO L82 PathProgramCache]: Analyzing trace with hash 460516603, now seen corresponding path program 2 times [2021-08-21 12:12:22,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:22,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324281725] [2021-08-21 12:12:22,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:22,205 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:22,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:22,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 12:12:22,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:22,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324281725] [2021-08-21 12:12:22,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324281725] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:22,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880726780] [2021-08-21 12:12:22,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:12:22,303 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:22,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:22,304 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 12:12:22,306 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 12:12:22,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:12:22,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:12:22,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:12:22,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:22,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 12:12:22,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880726780] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:22,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:22,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 6 [2021-08-21 12:12:22,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458403605] [2021-08-21 12:12:22,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:12:22,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:22,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:12:22,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:12:22,638 INFO L87 Difference]: Start difference. First operand 3403 states and 21448 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:22,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:22,920 INFO L93 Difference]: Finished difference Result 11115 states and 69290 transitions. [2021-08-21 12:12:22,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:12:22,920 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 12:12:22,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:23,008 INFO L225 Difference]: With dead ends: 11115 [2021-08-21 12:12:23,008 INFO L226 Difference]: Without dead ends: 10118 [2021-08-21 12:12:23,009 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 83.2ms TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:12:23,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10118 states. [2021-08-21 12:12:23,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10118 to 6709. [2021-08-21 12:12:23,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6709 states, 6708 states have (on average 6.731067382230173) internal successors, (45152), 6708 states have internal predecessors, (45152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:23,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6709 states to 6709 states and 45152 transitions. [2021-08-21 12:12:23,468 INFO L78 Accepts]: Start accepts. Automaton has 6709 states and 45152 transitions. Word has length 27 [2021-08-21 12:12:23,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:23,471 INFO L470 AbstractCegarLoop]: Abstraction has 6709 states and 45152 transitions. [2021-08-21 12:12:23,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:23,472 INFO L276 IsEmpty]: Start isEmpty. Operand 6709 states and 45152 transitions. [2021-08-21 12:12:23,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 12:12:23,513 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:23,513 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:12:23,540 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 12:12:23,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:23,740 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:12:23,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:23,741 INFO L82 PathProgramCache]: Analyzing trace with hash -90777990, now seen corresponding path program 3 times [2021-08-21 12:12:23,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:23,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667454070] [2021-08-21 12:12:23,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:23,785 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:23,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:23,827 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 12:12:23,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:23,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667454070] [2021-08-21 12:12:23,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667454070] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:23,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134298429] [2021-08-21 12:12:23,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:12:23,828 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:23,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:23,829 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 12:12:23,830 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 12:12:23,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:12:23,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:12:23,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 12:12:23,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:24,107 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 12:12:24,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134298429] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:24,108 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:24,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-21 12:12:24,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211458532] [2021-08-21 12:12:24,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:12:24,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:24,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:12:24,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:12:24,112 INFO L87 Difference]: Start difference. First operand 6709 states and 45152 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:24,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:24,305 INFO L93 Difference]: Finished difference Result 9291 states and 60293 transitions. [2021-08-21 12:12:24,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:12:24,305 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 12:12:24,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:24,369 INFO L225 Difference]: With dead ends: 9291 [2021-08-21 12:12:24,369 INFO L226 Difference]: Without dead ends: 7946 [2021-08-21 12:12:24,369 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 30.0ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:12:24,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7946 states. [2021-08-21 12:12:24,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7946 to 6226. [2021-08-21 12:12:24,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6226 states, 6225 states have (on average 6.658473895582329) internal successors, (41449), 6225 states have internal predecessors, (41449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:24,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6226 states to 6226 states and 41449 transitions. [2021-08-21 12:12:24,720 INFO L78 Accepts]: Start accepts. Automaton has 6226 states and 41449 transitions. Word has length 28 [2021-08-21 12:12:24,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:24,721 INFO L470 AbstractCegarLoop]: Abstraction has 6226 states and 41449 transitions. [2021-08-21 12:12:24,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:24,721 INFO L276 IsEmpty]: Start isEmpty. Operand 6226 states and 41449 transitions. [2021-08-21 12:12:24,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 12:12:24,746 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:24,746 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:12:24,769 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 12:12:24,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:24,965 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:12:24,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:24,965 INFO L82 PathProgramCache]: Analyzing trace with hash 292327756, now seen corresponding path program 4 times [2021-08-21 12:12:24,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:24,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606485479] [2021-08-21 12:12:24,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:24,966 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:24,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:25,014 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 12:12:25,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:25,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606485479] [2021-08-21 12:12:25,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606485479] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:25,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884814291] [2021-08-21 12:12:25,015 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:12:25,015 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:25,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:25,016 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 12:12:25,018 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 12:12:25,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:12:25,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:12:25,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 12:12:25,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:25,356 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 12:12:25,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884814291] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:25,356 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:25,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-21 12:12:25,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316829915] [2021-08-21 12:12:25,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:12:25,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:25,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:12:25,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:12:25,358 INFO L87 Difference]: Start difference. First operand 6226 states and 41449 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:25,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:25,562 INFO L93 Difference]: Finished difference Result 9667 states and 62399 transitions. [2021-08-21 12:12:25,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:12:25,563 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 12:12:25,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:25,706 INFO L225 Difference]: With dead ends: 9667 [2021-08-21 12:12:25,706 INFO L226 Difference]: Without dead ends: 7372 [2021-08-21 12:12:25,706 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 54.1ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:12:25,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7372 states. [2021-08-21 12:12:25,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7372 to 6226. [2021-08-21 12:12:25,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6226 states, 6225 states have (on average 6.566586345381526) internal successors, (40877), 6225 states have internal predecessors, (40877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:26,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6226 states to 6226 states and 40877 transitions. [2021-08-21 12:12:26,074 INFO L78 Accepts]: Start accepts. Automaton has 6226 states and 40877 transitions. Word has length 28 [2021-08-21 12:12:26,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:26,074 INFO L470 AbstractCegarLoop]: Abstraction has 6226 states and 40877 transitions. [2021-08-21 12:12:26,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:26,075 INFO L276 IsEmpty]: Start isEmpty. Operand 6226 states and 40877 transitions. [2021-08-21 12:12:26,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 12:12:26,108 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:26,108 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:12:26,127 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 12:12:26,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-21 12:12:26,315 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:12:26,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:26,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1127701574, now seen corresponding path program 5 times [2021-08-21 12:12:26,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:26,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945362433] [2021-08-21 12:12:26,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:26,316 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:26,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:26,365 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 12:12:26,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:26,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945362433] [2021-08-21 12:12:26,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945362433] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:26,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732176575] [2021-08-21 12:12:26,366 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:12:26,366 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:26,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:26,381 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 12:12:26,381 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 12:12:26,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:12:26,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:12:26,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 12:12:26,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:26,650 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 12:12:26,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732176575] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:26,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:26,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-21 12:12:26,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483569402] [2021-08-21 12:12:26,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:12:26,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:26,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:12:26,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:12:26,652 INFO L87 Difference]: Start difference. First operand 6226 states and 40877 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:26,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:26,863 INFO L93 Difference]: Finished difference Result 9093 states and 58145 transitions. [2021-08-21 12:12:26,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:12:26,863 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 12:12:26,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:26,902 INFO L225 Difference]: With dead ends: 9093 [2021-08-21 12:12:26,902 INFO L226 Difference]: Without dead ends: 7656 [2021-08-21 12:12:26,902 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 46.2ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:12:26,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7656 states. [2021-08-21 12:12:27,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7656 to 5654. [2021-08-21 12:12:27,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5654 states, 5653 states have (on average 6.428268176189634) internal successors, (36339), 5653 states have internal predecessors, (36339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:27,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5654 states to 5654 states and 36339 transitions. [2021-08-21 12:12:27,125 INFO L78 Accepts]: Start accepts. Automaton has 5654 states and 36339 transitions. Word has length 28 [2021-08-21 12:12:27,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:27,125 INFO L470 AbstractCegarLoop]: Abstraction has 5654 states and 36339 transitions. [2021-08-21 12:12:27,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:27,125 INFO L276 IsEmpty]: Start isEmpty. Operand 5654 states and 36339 transitions. [2021-08-21 12:12:27,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 12:12:27,146 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:27,146 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:12:27,171 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 12:12:27,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:27,363 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:12:27,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:27,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1808352738, now seen corresponding path program 6 times [2021-08-21 12:12:27,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:27,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103354864] [2021-08-21 12:12:27,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:27,364 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:27,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:27,409 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 12:12:27,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:27,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103354864] [2021-08-21 12:12:27,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103354864] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:27,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030644866] [2021-08-21 12:12:27,410 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:12:27,410 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:27,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:27,425 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 12:12:27,426 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 12:12:27,656 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:12:27,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:12:27,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 12:12:27,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:27,808 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 12:12:27,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030644866] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:27,809 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:27,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-21 12:12:27,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214679756] [2021-08-21 12:12:27,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:12:27,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:27,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:12:27,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:12:27,810 INFO L87 Difference]: Start difference. First operand 5654 states and 36339 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:27,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:27,946 INFO L93 Difference]: Finished difference Result 7946 states and 50780 transitions. [2021-08-21 12:12:27,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:12:27,946 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 12:12:27,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:27,977 INFO L225 Difference]: With dead ends: 7946 [2021-08-21 12:12:27,977 INFO L226 Difference]: Without dead ends: 6800 [2021-08-21 12:12:27,977 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 32.1ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:12:27,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6800 states. [2021-08-21 12:12:28,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6800 to 5368. [2021-08-21 12:12:28,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5368 states, 5367 states have (on average 6.374697223774921) internal successors, (34213), 5367 states have internal predecessors, (34213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:28,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5368 states to 5368 states and 34213 transitions. [2021-08-21 12:12:28,225 INFO L78 Accepts]: Start accepts. Automaton has 5368 states and 34213 transitions. Word has length 28 [2021-08-21 12:12:28,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:28,225 INFO L470 AbstractCegarLoop]: Abstraction has 5368 states and 34213 transitions. [2021-08-21 12:12:28,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:28,225 INFO L276 IsEmpty]: Start isEmpty. Operand 5368 states and 34213 transitions. [2021-08-21 12:12:28,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 12:12:28,246 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:28,246 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:12:28,270 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 12:12:28,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-21 12:12:28,469 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:12:28,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:28,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1475497308, now seen corresponding path program 7 times [2021-08-21 12:12:28,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:28,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786459027] [2021-08-21 12:12:28,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:28,470 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:28,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:28,526 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 12:12:28,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:28,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786459027] [2021-08-21 12:12:28,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786459027] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:28,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883866187] [2021-08-21 12:12:28,526 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:12:28,526 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:28,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:28,531 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 12:12:28,577 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 12:12:28,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:28,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 12:12:28,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:28,922 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 12:12:28,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883866187] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:28,923 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:28,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-21 12:12:28,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518170097] [2021-08-21 12:12:28,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:12:28,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:28,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:12:28,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:12:28,924 INFO L87 Difference]: Start difference. First operand 5368 states and 34213 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:29,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:29,081 INFO L93 Difference]: Finished difference Result 7087 states and 45258 transitions. [2021-08-21 12:12:29,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:12:29,081 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 12:12:29,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:29,111 INFO L225 Difference]: With dead ends: 7087 [2021-08-21 12:12:29,111 INFO L226 Difference]: Without dead ends: 6512 [2021-08-21 12:12:29,111 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 49.2ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:12:29,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6512 states. [2021-08-21 12:12:29,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6512 to 5940. [2021-08-21 12:12:29,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5940 states, 5939 states have (on average 6.380367065162485) internal successors, (37893), 5939 states have internal predecessors, (37893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:29,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5940 states to 5940 states and 37893 transitions. [2021-08-21 12:12:29,331 INFO L78 Accepts]: Start accepts. Automaton has 5940 states and 37893 transitions. Word has length 28 [2021-08-21 12:12:29,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:29,332 INFO L470 AbstractCegarLoop]: Abstraction has 5940 states and 37893 transitions. [2021-08-21 12:12:29,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:29,332 INFO L276 IsEmpty]: Start isEmpty. Operand 5940 states and 37893 transitions. [2021-08-21 12:12:29,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:12:29,355 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:29,355 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:12:29,379 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 12:12:29,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-21 12:12:29,579 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:12:29,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:29,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1880877169, now seen corresponding path program 8 times [2021-08-21 12:12:29,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:29,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368652675] [2021-08-21 12:12:29,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:29,580 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:29,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:29,636 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 12:12:29,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:29,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368652675] [2021-08-21 12:12:29,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368652675] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:29,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629429445] [2021-08-21 12:12:29,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:12:29,637 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:29,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:29,649 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 12:12:29,650 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 12:12:29,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:12:29,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:12:29,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 12:12:29,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:30,269 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 12:12:30,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629429445] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:30,269 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:30,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-08-21 12:12:30,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329725103] [2021-08-21 12:12:30,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:12:30,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:30,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:12:30,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:12:30,270 INFO L87 Difference]: Start difference. First operand 5940 states and 37893 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:30,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:30,410 INFO L93 Difference]: Finished difference Result 11496 states and 73614 transitions. [2021-08-21 12:12:30,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:12:30,411 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:12:30,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:30,470 INFO L225 Difference]: With dead ends: 11496 [2021-08-21 12:12:30,470 INFO L226 Difference]: Without dead ends: 11208 [2021-08-21 12:12:30,471 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 49.7ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:12:30,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11208 states. [2021-08-21 12:12:30,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11208 to 9196. [2021-08-21 12:12:30,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9196 states, 9195 states have (on average 6.621098423056009) internal successors, (60881), 9195 states have internal predecessors, (60881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:30,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9196 states to 9196 states and 60881 transitions. [2021-08-21 12:12:30,834 INFO L78 Accepts]: Start accepts. Automaton has 9196 states and 60881 transitions. Word has length 29 [2021-08-21 12:12:30,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:30,835 INFO L470 AbstractCegarLoop]: Abstraction has 9196 states and 60881 transitions. [2021-08-21 12:12:30,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:30,835 INFO L276 IsEmpty]: Start isEmpty. Operand 9196 states and 60881 transitions. [2021-08-21 12:12:30,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 12:12:30,865 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:30,865 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:12:30,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-21 12:12:31,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-21 12:12:31,066 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:12:31,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:31,066 INFO L82 PathProgramCache]: Analyzing trace with hash -847814829, now seen corresponding path program 9 times [2021-08-21 12:12:31,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:31,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219992898] [2021-08-21 12:12:31,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:31,066 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:31,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:31,124 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 12:12:31,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:31,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219992898] [2021-08-21 12:12:31,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219992898] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:31,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581712159] [2021-08-21 12:12:31,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:12:31,125 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:31,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:31,126 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 12:12:31,151 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 12:12:31,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:12:31,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:12:31,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:12:31,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:31,572 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-21 12:12:31,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581712159] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:31,573 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:31,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-08-21 12:12:31,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898690555] [2021-08-21 12:12:31,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:12:31,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:31,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:12:31,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:12:31,574 INFO L87 Difference]: Start difference. First operand 9196 states and 60881 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:32,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:32,065 INFO L93 Difference]: Finished difference Result 25018 states and 159726 transitions. [2021-08-21 12:12:32,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:12:32,066 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 12:12:32,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:32,229 INFO L225 Difference]: With dead ends: 25018 [2021-08-21 12:12:32,229 INFO L226 Difference]: Without dead ends: 22353 [2021-08-21 12:12:32,230 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 119.8ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:12:32,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22353 states. [2021-08-21 12:12:32,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22353 to 13742. [2021-08-21 12:12:32,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13742 states, 13741 states have (on average 6.9258423695509785) internal successors, (95168), 13741 states have internal predecessors, (95168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:32,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13742 states to 13742 states and 95168 transitions. [2021-08-21 12:12:32,867 INFO L78 Accepts]: Start accepts. Automaton has 13742 states and 95168 transitions. Word has length 29 [2021-08-21 12:12:32,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:32,867 INFO L470 AbstractCegarLoop]: Abstraction has 13742 states and 95168 transitions. [2021-08-21 12:12:32,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:32,868 INFO L276 IsEmpty]: Start isEmpty. Operand 13742 states and 95168 transitions. [2021-08-21 12:12:32,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:12:32,919 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:32,919 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, 1] [2021-08-21 12:12:32,936 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 12:12:33,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-21 12:12:33,120 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:12:33,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:33,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1109462170, now seen corresponding path program 10 times [2021-08-21 12:12:33,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:33,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563457428] [2021-08-21 12:12:33,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:33,121 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:33,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:33,167 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-21 12:12:33,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:33,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563457428] [2021-08-21 12:12:33,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563457428] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:33,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417750649] [2021-08-21 12:12:33,168 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:12:33,168 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:33,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:33,169 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 12:12:33,185 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 12:12:33,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:12:33,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:12:33,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 12:12:33,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:33,575 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-21 12:12:33,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417750649] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:33,575 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:33,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-21 12:12:33,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284700287] [2021-08-21 12:12:33,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:12:33,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:33,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:12:33,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:12:33,577 INFO L87 Difference]: Start difference. First operand 13742 states and 95168 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:33,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:33,848 INFO L93 Difference]: Finished difference Result 22024 states and 145091 transitions. [2021-08-21 12:12:33,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:12:33,848 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:12:33,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:33,928 INFO L225 Difference]: With dead ends: 22024 [2021-08-21 12:12:33,928 INFO L226 Difference]: Without dead ends: 17242 [2021-08-21 12:12:33,929 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 32.2ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:12:33,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17242 states. [2021-08-21 12:12:34,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17242 to 12713. [2021-08-21 12:12:34,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12713 states, 12712 states have (on average 6.821821900566394) internal successors, (86719), 12712 states have internal predecessors, (86719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:34,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12713 states to 12713 states and 86719 transitions. [2021-08-21 12:12:34,567 INFO L78 Accepts]: Start accepts. Automaton has 12713 states and 86719 transitions. Word has length 30 [2021-08-21 12:12:34,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:34,567 INFO L470 AbstractCegarLoop]: Abstraction has 12713 states and 86719 transitions. [2021-08-21 12:12:34,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:34,567 INFO L276 IsEmpty]: Start isEmpty. Operand 12713 states and 86719 transitions. [2021-08-21 12:12:34,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:12:34,606 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:34,606 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, 1] [2021-08-21 12:12:34,623 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 12:12:34,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:34,807 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:12:34,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:34,807 INFO L82 PathProgramCache]: Analyzing trace with hash 465673390, now seen corresponding path program 11 times [2021-08-21 12:12:34,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:34,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064354882] [2021-08-21 12:12:34,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:34,808 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:34,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:34,843 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-21 12:12:34,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:34,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064354882] [2021-08-21 12:12:34,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064354882] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:34,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31118264] [2021-08-21 12:12:34,843 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:12:34,844 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:34,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:34,845 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 12:12:34,846 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 12:12:35,080 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:12:35,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:12:35,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 12:12:35,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:35,206 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-21 12:12:35,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31118264] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:35,206 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:35,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-21 12:12:35,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371785444] [2021-08-21 12:12:35,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:12:35,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:35,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:12:35,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:12:35,207 INFO L87 Difference]: Start difference. First operand 12713 states and 86719 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:35,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:35,686 INFO L93 Difference]: Finished difference Result 24284 states and 158204 transitions. [2021-08-21 12:12:35,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:12:35,687 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:12:35,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:35,765 INFO L225 Difference]: With dead ends: 24284 [2021-08-21 12:12:35,765 INFO L226 Difference]: Without dead ends: 15901 [2021-08-21 12:12:35,765 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 45.9ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:12:35,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15901 states. [2021-08-21 12:12:36,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15901 to 12713. [2021-08-21 12:12:36,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12713 states, 12712 states have (on average 6.732772183763373) internal successors, (85587), 12712 states have internal predecessors, (85587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:36,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12713 states to 12713 states and 85587 transitions. [2021-08-21 12:12:36,465 INFO L78 Accepts]: Start accepts. Automaton has 12713 states and 85587 transitions. Word has length 30 [2021-08-21 12:12:36,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:36,466 INFO L470 AbstractCegarLoop]: Abstraction has 12713 states and 85587 transitions. [2021-08-21 12:12:36,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:36,466 INFO L276 IsEmpty]: Start isEmpty. Operand 12713 states and 85587 transitions. [2021-08-21 12:12:36,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:12:36,502 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:36,502 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, 1] [2021-08-21 12:12:36,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-08-21 12:12:36,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-21 12:12:36,704 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:12:36,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:36,704 INFO L82 PathProgramCache]: Analyzing trace with hash -2003086426, now seen corresponding path program 12 times [2021-08-21 12:12:36,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:36,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034921813] [2021-08-21 12:12:36,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:36,704 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:36,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:36,741 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-21 12:12:36,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:36,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034921813] [2021-08-21 12:12:36,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034921813] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:36,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961369909] [2021-08-21 12:12:36,741 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:12:36,741 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:36,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:36,744 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 12:12:36,745 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 12:12:37,102 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:12:37,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:12:37,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 12:12:37,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:37,233 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-21 12:12:37,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961369909] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:37,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:37,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-21 12:12:37,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155531034] [2021-08-21 12:12:37,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:12:37,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:37,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:12:37,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:12:37,235 INFO L87 Difference]: Start difference. First operand 12713 states and 85587 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:37,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:37,526 INFO L93 Difference]: Finished difference Result 22021 states and 143389 transitions. [2021-08-21 12:12:37,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:12:37,526 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:12:37,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:37,702 INFO L225 Difference]: With dead ends: 22021 [2021-08-21 12:12:37,703 INFO L226 Difference]: Without dead ends: 15543 [2021-08-21 12:12:37,703 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 50.0ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:12:37,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15543 states. [2021-08-21 12:12:38,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15543 to 11581. [2021-08-21 12:12:38,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11581 states, 11580 states have (on average 6.59853195164076) internal successors, (76411), 11580 states have internal predecessors, (76411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:38,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11581 states to 11581 states and 76411 transitions. [2021-08-21 12:12:38,216 INFO L78 Accepts]: Start accepts. Automaton has 11581 states and 76411 transitions. Word has length 30 [2021-08-21 12:12:38,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:38,216 INFO L470 AbstractCegarLoop]: Abstraction has 11581 states and 76411 transitions. [2021-08-21 12:12:38,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:38,216 INFO L276 IsEmpty]: Start isEmpty. Operand 11581 states and 76411 transitions. [2021-08-21 12:12:38,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:12:38,253 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:38,253 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, 1] [2021-08-21 12:12:38,270 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-08-21 12:12:38,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:38,456 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:12:38,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:38,457 INFO L82 PathProgramCache]: Analyzing trace with hash 415691786, now seen corresponding path program 13 times [2021-08-21 12:12:38,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:38,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036969455] [2021-08-21 12:12:38,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:38,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:38,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:38,496 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-21 12:12:38,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:38,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036969455] [2021-08-21 12:12:38,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036969455] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:38,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361931256] [2021-08-21 12:12:38,497 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:12:38,497 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:38,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:38,498 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 12:12:38,528 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 12:12:38,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:38,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 12:12:38,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:38,912 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-21 12:12:38,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361931256] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:38,913 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:38,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-21 12:12:38,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418542373] [2021-08-21 12:12:38,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:12:38,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:38,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:12:38,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:12:38,914 INFO L87 Difference]: Start difference. First operand 11581 states and 76411 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:39,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:39,254 INFO L93 Difference]: Finished difference Result 18164 states and 118652 transitions. [2021-08-21 12:12:39,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:12:39,255 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:12:39,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:39,317 INFO L225 Difference]: With dead ends: 18164 [2021-08-21 12:12:39,317 INFO L226 Difference]: Without dead ends: 14769 [2021-08-21 12:12:39,317 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 30.8ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:12:39,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14769 states. [2021-08-21 12:12:39,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14769 to 11015. [2021-08-21 12:12:39,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11015 states, 11014 states have (on average 6.546758670782641) internal successors, (72106), 11014 states have internal predecessors, (72106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:39,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11015 states to 11015 states and 72106 transitions. [2021-08-21 12:12:39,726 INFO L78 Accepts]: Start accepts. Automaton has 11015 states and 72106 transitions. Word has length 30 [2021-08-21 12:12:39,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:39,726 INFO L470 AbstractCegarLoop]: Abstraction has 11015 states and 72106 transitions. [2021-08-21 12:12:39,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:39,726 INFO L276 IsEmpty]: Start isEmpty. Operand 11015 states and 72106 transitions. [2021-08-21 12:12:39,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:12:39,762 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:39,762 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, 1] [2021-08-21 12:12:39,785 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 12:12:39,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:39,981 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:12:39,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:39,981 INFO L82 PathProgramCache]: Analyzing trace with hash 477731400, now seen corresponding path program 14 times [2021-08-21 12:12:39,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:39,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923115155] [2021-08-21 12:12:39,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:39,982 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:39,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:40,017 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-21 12:12:40,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:40,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923115155] [2021-08-21 12:12:40,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923115155] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:40,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128342666] [2021-08-21 12:12:40,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:12:40,017 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:40,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:40,018 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 12:12:40,019 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 12:12:40,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:12:40,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:12:40,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 12:12:40,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:40,405 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-21 12:12:40,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128342666] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:40,406 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:40,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-21 12:12:40,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453003103] [2021-08-21 12:12:40,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:12:40,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:40,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:12:40,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:12:40,408 INFO L87 Difference]: Start difference. First operand 11015 states and 72106 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:40,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:40,753 INFO L93 Difference]: Finished difference Result 16004 states and 104321 transitions. [2021-08-21 12:12:40,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:12:40,753 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:12:40,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:40,810 INFO L225 Difference]: With dead ends: 16004 [2021-08-21 12:12:40,810 INFO L226 Difference]: Without dead ends: 13279 [2021-08-21 12:12:40,811 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 188.0ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:12:40,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13279 states. [2021-08-21 12:12:41,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13279 to 12147. [2021-08-21 12:12:41,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12147 states, 12146 states have (on average 6.552280586201219) internal successors, (79584), 12146 states have internal predecessors, (79584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:41,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12147 states to 12147 states and 79584 transitions. [2021-08-21 12:12:41,311 INFO L78 Accepts]: Start accepts. Automaton has 12147 states and 79584 transitions. Word has length 30 [2021-08-21 12:12:41,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:41,312 INFO L470 AbstractCegarLoop]: Abstraction has 12147 states and 79584 transitions. [2021-08-21 12:12:41,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:41,312 INFO L276 IsEmpty]: Start isEmpty. Operand 12147 states and 79584 transitions. [2021-08-21 12:12:41,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:12:41,345 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:41,345 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:12:41,362 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 12:12:41,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:41,548 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:12:41,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:41,548 INFO L82 PathProgramCache]: Analyzing trace with hash 2135980253, now seen corresponding path program 15 times [2021-08-21 12:12:41,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:41,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217851065] [2021-08-21 12:12:41,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:41,549 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:41,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:41,603 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-21 12:12:41,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:41,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217851065] [2021-08-21 12:12:41,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217851065] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:41,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935024990] [2021-08-21 12:12:41,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:12:41,604 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:41,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:41,617 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 12:12:41,624 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 12:12:42,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 12:12:42,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:12:42,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 12:12:42,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:42,386 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-21 12:12:42,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935024990] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:42,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:42,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 9 [2021-08-21 12:12:42,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982723023] [2021-08-21 12:12:42,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:12:42,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:42,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:12:42,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:12:42,388 INFO L87 Difference]: Start difference. First operand 12147 states and 79584 transitions. Second operand has 10 states, 10 states have (on average 5.7) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:43,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:43,240 INFO L93 Difference]: Finished difference Result 42090 states and 268739 transitions. [2021-08-21 12:12:43,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:12:43,241 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 12:12:43,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:43,593 INFO L225 Difference]: With dead ends: 42090 [2021-08-21 12:12:43,593 INFO L226 Difference]: Without dead ends: 38810 [2021-08-21 12:12:43,594 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 194.1ms TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:12:43,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38810 states. [2021-08-21 12:12:44,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38810 to 24247. [2021-08-21 12:12:44,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24247 states, 24246 states have (on average 6.913552750969232) internal successors, (167626), 24246 states have internal predecessors, (167626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:44,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24247 states to 24247 states and 167626 transitions. [2021-08-21 12:12:44,923 INFO L78 Accepts]: Start accepts. Automaton has 24247 states and 167626 transitions. Word has length 31 [2021-08-21 12:12:44,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:44,923 INFO L470 AbstractCegarLoop]: Abstraction has 24247 states and 167626 transitions. [2021-08-21 12:12:44,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:44,923 INFO L276 IsEmpty]: Start isEmpty. Operand 24247 states and 167626 transitions. [2021-08-21 12:12:45,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 12:12:45,012 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:45,013 INFO L512 BasicCegarLoop]: trace histogram [3, 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 12:12:45,032 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 12:12:45,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:45,213 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:12:45,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:45,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1628666418, now seen corresponding path program 16 times [2021-08-21 12:12:45,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:45,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005515214] [2021-08-21 12:12:45,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:45,214 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:45,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:45,260 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-21 12:12:45,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:45,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005515214] [2021-08-21 12:12:45,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005515214] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:45,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549806841] [2021-08-21 12:12:45,260 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:12:45,260 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:45,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:45,274 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 12:12:45,296 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 12:12:45,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:12:45,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:12:45,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:12:45,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:46,084 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-21 12:12:46,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549806841] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:46,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:46,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-08-21 12:12:46,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114986723] [2021-08-21 12:12:46,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:12:46,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:46,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:12:46,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:12:46,086 INFO L87 Difference]: Start difference. First operand 24247 states and 167626 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:46,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:46,816 INFO L93 Difference]: Finished difference Result 33951 states and 226852 transitions. [2021-08-21 12:12:46,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:12:46,816 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 12:12:46,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:47,094 INFO L225 Difference]: With dead ends: 33951 [2021-08-21 12:12:47,094 INFO L226 Difference]: Without dead ends: 31017 [2021-08-21 12:12:47,094 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 52.8ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:12:47,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31017 states. [2021-08-21 12:12:48,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31017 to 23869. [2021-08-21 12:12:48,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23869 states, 23868 states have (on average 6.8552874141109434) internal successors, (163622), 23868 states have internal predecessors, (163622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:48,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23869 states to 23869 states and 163622 transitions. [2021-08-21 12:12:48,298 INFO L78 Accepts]: Start accepts. Automaton has 23869 states and 163622 transitions. Word has length 32 [2021-08-21 12:12:48,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:48,298 INFO L470 AbstractCegarLoop]: Abstraction has 23869 states and 163622 transitions. [2021-08-21 12:12:48,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:48,299 INFO L276 IsEmpty]: Start isEmpty. Operand 23869 states and 163622 transitions. [2021-08-21 12:12:48,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 12:12:48,382 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:48,382 INFO L512 BasicCegarLoop]: trace histogram [3, 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 12:12:48,399 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 12:12:48,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-21 12:12:48,582 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:12:48,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:48,583 INFO L82 PathProgramCache]: Analyzing trace with hash 620042656, now seen corresponding path program 17 times [2021-08-21 12:12:48,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:48,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651052023] [2021-08-21 12:12:48,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:48,583 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:48,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:48,896 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-21 12:12:48,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:48,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651052023] [2021-08-21 12:12:48,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651052023] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:48,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635929354] [2021-08-21 12:12:48,897 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:12:48,897 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:48,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:48,917 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 12:12:48,920 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 12:12:49,242 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:12:49,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:12:49,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:12:49,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:49,388 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-21 12:12:49,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635929354] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:49,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:49,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 12:12:49,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495421926] [2021-08-21 12:12:49,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:12:49,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:49,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:12:49,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:12:49,390 INFO L87 Difference]: Start difference. First operand 23869 states and 163622 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:50,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:50,142 INFO L93 Difference]: Finished difference Result 35105 states and 233275 transitions. [2021-08-21 12:12:50,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:12:50,142 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 12:12:50,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:50,305 INFO L225 Difference]: With dead ends: 35105 [2021-08-21 12:12:50,305 INFO L226 Difference]: Without dead ends: 27952 [2021-08-21 12:12:50,305 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 117.5ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:12:50,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27952 states. [2021-08-21 12:12:51,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27952 to 21827. [2021-08-21 12:12:51,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21827 states, 21826 states have (on average 6.797443416109227) internal successors, (148361), 21826 states have internal predecessors, (148361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:51,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21827 states to 21827 states and 148361 transitions. [2021-08-21 12:12:51,400 INFO L78 Accepts]: Start accepts. Automaton has 21827 states and 148361 transitions. Word has length 32 [2021-08-21 12:12:51,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:51,400 INFO L470 AbstractCegarLoop]: Abstraction has 21827 states and 148361 transitions. [2021-08-21 12:12:51,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:51,401 INFO L276 IsEmpty]: Start isEmpty. Operand 21827 states and 148361 transitions. [2021-08-21 12:12:51,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 12:12:51,460 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:51,460 INFO L512 BasicCegarLoop]: trace histogram [3, 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 12:12:51,477 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 12:12:51,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-21 12:12:51,665 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:12:51,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:51,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1356406896, now seen corresponding path program 18 times [2021-08-21 12:12:51,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:51,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410041844] [2021-08-21 12:12:51,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:51,668 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:51,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:51,721 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-21 12:12:51,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:51,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410041844] [2021-08-21 12:12:51,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410041844] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:51,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839355538] [2021-08-21 12:12:51,722 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:12:51,722 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:51,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:51,722 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 12:12:51,727 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 12:12:52,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:12:52,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:12:52,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:12:52,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:52,389 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-21 12:12:52,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839355538] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:52,389 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:52,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-08-21 12:12:52,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513138727] [2021-08-21 12:12:52,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:12:52,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:52,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:12:52,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:12:52,391 INFO L87 Difference]: Start difference. First operand 21827 states and 148361 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:53,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:53,117 INFO L93 Difference]: Finished difference Result 39186 states and 256137 transitions. [2021-08-21 12:12:53,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:12:53,118 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 12:12:53,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:53,335 INFO L225 Difference]: With dead ends: 39186 [2021-08-21 12:12:53,335 INFO L226 Difference]: Without dead ends: 33561 [2021-08-21 12:12:53,335 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 83.4ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:12:53,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33561 states. [2021-08-21 12:12:54,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33561 to 21317. [2021-08-21 12:12:54,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21317 states, 21316 states have (on average 6.68540063801839) internal successors, (142506), 21316 states have internal predecessors, (142506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:54,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21317 states to 21317 states and 142506 transitions. [2021-08-21 12:12:54,526 INFO L78 Accepts]: Start accepts. Automaton has 21317 states and 142506 transitions. Word has length 32 [2021-08-21 12:12:54,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:54,526 INFO L470 AbstractCegarLoop]: Abstraction has 21317 states and 142506 transitions. [2021-08-21 12:12:54,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:54,526 INFO L276 IsEmpty]: Start isEmpty. Operand 21317 states and 142506 transitions. [2021-08-21 12:12:54,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 12:12:54,584 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:54,584 INFO L512 BasicCegarLoop]: trace histogram [3, 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 12:12:54,601 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-08-21 12:12:54,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:54,785 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:12:54,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:54,786 INFO L82 PathProgramCache]: Analyzing trace with hash -2037058060, now seen corresponding path program 19 times [2021-08-21 12:12:54,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:54,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204660828] [2021-08-21 12:12:54,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:54,786 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:54,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:54,828 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-21 12:12:54,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:54,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204660828] [2021-08-21 12:12:54,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204660828] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:54,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078253939] [2021-08-21 12:12:54,828 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:12:54,828 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:54,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:54,829 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 12:12:54,830 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 12:12:55,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:55,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:12:55,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:55,313 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-21 12:12:55,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078253939] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:55,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:55,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-08-21 12:12:55,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240972137] [2021-08-21 12:12:55,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:12:55,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:55,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:12:55,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:12:55,315 INFO L87 Difference]: Start difference. First operand 21317 states and 142506 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:55,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:55,886 INFO L93 Difference]: Finished difference Result 35611 states and 232490 transitions. [2021-08-21 12:12:55,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:12:55,886 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 12:12:55,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:56,227 INFO L225 Difference]: With dead ends: 35611 [2021-08-21 12:12:56,227 INFO L226 Difference]: Without dead ends: 28971 [2021-08-21 12:12:56,227 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 68.6ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:12:56,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28971 states. [2021-08-21 12:12:56,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28971 to 20296. [2021-08-21 12:12:56,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20296 states, 20295 states have (on average 6.620645479182064) internal successors, (134366), 20295 states have internal predecessors, (134366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:57,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20296 states to 20296 states and 134366 transitions. [2021-08-21 12:12:57,023 INFO L78 Accepts]: Start accepts. Automaton has 20296 states and 134366 transitions. Word has length 32 [2021-08-21 12:12:57,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:57,024 INFO L470 AbstractCegarLoop]: Abstraction has 20296 states and 134366 transitions. [2021-08-21 12:12:57,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:57,024 INFO L276 IsEmpty]: Start isEmpty. Operand 20296 states and 134366 transitions. [2021-08-21 12:12:57,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 12:12:57,091 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:57,091 INFO L512 BasicCegarLoop]: trace histogram [3, 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 12:12:57,108 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-08-21 12:12:57,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:57,291 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:12:57,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:57,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1246791986, now seen corresponding path program 20 times [2021-08-21 12:12:57,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:57,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230122612] [2021-08-21 12:12:57,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:57,292 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:57,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:12:57,349 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-21 12:12:57,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:12:57,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230122612] [2021-08-21 12:12:57,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230122612] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:57,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322367785] [2021-08-21 12:12:57,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:12:57,349 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:12:57,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:12:57,350 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 12:12:57,351 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 12:12:57,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:12:57,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:12:57,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:12:57,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:12:58,075 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-21 12:12:58,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322367785] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:12:58,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:12:58,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-21 12:12:58,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15838546] [2021-08-21 12:12:58,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:12:58,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:12:58,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:12:58,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:12:58,076 INFO L87 Difference]: Start difference. First operand 20296 states and 134366 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:58,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:12:58,808 INFO L93 Difference]: Finished difference Result 30499 states and 199941 transitions. [2021-08-21 12:12:58,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:12:58,808 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 12:12:58,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:12:58,977 INFO L225 Difference]: With dead ends: 30499 [2021-08-21 12:12:58,977 INFO L226 Difference]: Without dead ends: 29476 [2021-08-21 12:12:58,977 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 100.5ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:12:59,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29476 states. [2021-08-21 12:12:59,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29476 to 20296. [2021-08-21 12:12:59,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20296 states, 20295 states have (on average 6.620645479182064) internal successors, (134366), 20295 states have internal predecessors, (134366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:59,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20296 states to 20296 states and 134366 transitions. [2021-08-21 12:12:59,733 INFO L78 Accepts]: Start accepts. Automaton has 20296 states and 134366 transitions. Word has length 32 [2021-08-21 12:12:59,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:12:59,733 INFO L470 AbstractCegarLoop]: Abstraction has 20296 states and 134366 transitions. [2021-08-21 12:12:59,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:12:59,733 INFO L276 IsEmpty]: Start isEmpty. Operand 20296 states and 134366 transitions. [2021-08-21 12:12:59,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 12:12:59,785 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:12:59,785 INFO L512 BasicCegarLoop]: trace histogram [3, 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 12:12:59,804 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 12:12:59,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-21 12:12:59,986 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:12:59,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:12:59,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1883991200, now seen corresponding path program 21 times [2021-08-21 12:12:59,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:12:59,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549853683] [2021-08-21 12:12:59,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:12:59,987 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:12:59,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:00,039 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-21 12:13:00,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:00,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549853683] [2021-08-21 12:13:00,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549853683] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:00,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845154202] [2021-08-21 12:13:00,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:13:00,039 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:00,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:00,040 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 12:13:00,040 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 12:13:00,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:13:00,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:00,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 12:13:00,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:01,012 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-21 12:13:01,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845154202] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:01,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:01,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-08-21 12:13:01,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794272495] [2021-08-21 12:13:01,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:13:01,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:01,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:13:01,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:13:01,014 INFO L87 Difference]: Start difference. First operand 20296 states and 134366 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:02,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:02,452 INFO L93 Difference]: Finished difference Result 51829 states and 330813 transitions. [2021-08-21 12:13:02,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 12:13:02,452 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 12:13:02,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:02,969 INFO L225 Difference]: With dead ends: 51829 [2021-08-21 12:13:02,970 INFO L226 Difference]: Without dead ends: 45101 [2021-08-21 12:13:02,970 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 406.9ms TimeCoverageRelationStatistics Valid=240, Invalid=1740, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 12:13:03,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45101 states. [2021-08-21 12:13:03,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45101 to 23196. [2021-08-21 12:13:03,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23196 states, 23195 states have (on average 6.768743263634404) internal successors, (157001), 23195 states have internal predecessors, (157001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:04,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23196 states to 23196 states and 157001 transitions. [2021-08-21 12:13:04,293 INFO L78 Accepts]: Start accepts. Automaton has 23196 states and 157001 transitions. Word has length 32 [2021-08-21 12:13:04,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:04,293 INFO L470 AbstractCegarLoop]: Abstraction has 23196 states and 157001 transitions. [2021-08-21 12:13:04,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:04,293 INFO L276 IsEmpty]: Start isEmpty. Operand 23196 states and 157001 transitions. [2021-08-21 12:13:04,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 12:13:04,399 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:04,399 INFO L512 BasicCegarLoop]: trace histogram [3, 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 12:13:04,425 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 12:13:04,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-21 12:13:04,621 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:13:04,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:04,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1883118756, now seen corresponding path program 22 times [2021-08-21 12:13:04,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:04,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598614089] [2021-08-21 12:13:04,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:04,622 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:04,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:04,667 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-21 12:13:04,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:04,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598614089] [2021-08-21 12:13:04,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598614089] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:04,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188283418] [2021-08-21 12:13:04,668 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:13:04,668 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:04,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:04,669 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 12:13:04,669 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 12:13:05,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:13:05,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:05,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:13:05,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:05,221 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-21 12:13:05,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188283418] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:05,222 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:05,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-08-21 12:13:05,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63840679] [2021-08-21 12:13:05,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:13:05,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:05,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:13:05,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:13:05,223 INFO L87 Difference]: Start difference. First operand 23196 states and 157001 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:05,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:05,909 INFO L93 Difference]: Finished difference Result 35396 states and 233654 transitions. [2021-08-21 12:13:05,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:13:05,910 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 12:13:05,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:06,061 INFO L225 Difference]: With dead ends: 35396 [2021-08-21 12:13:06,061 INFO L226 Difference]: Without dead ends: 31326 [2021-08-21 12:13:06,061 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 73.0ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:13:06,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31326 states. [2021-08-21 12:13:06,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31326 to 23196. [2021-08-21 12:13:06,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23196 states, 23195 states have (on average 6.743737874541927) internal successors, (156421), 23195 states have internal predecessors, (156421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:07,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23196 states to 23196 states and 156421 transitions. [2021-08-21 12:13:07,155 INFO L78 Accepts]: Start accepts. Automaton has 23196 states and 156421 transitions. Word has length 32 [2021-08-21 12:13:07,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:07,155 INFO L470 AbstractCegarLoop]: Abstraction has 23196 states and 156421 transitions. [2021-08-21 12:13:07,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:07,155 INFO L276 IsEmpty]: Start isEmpty. Operand 23196 states and 156421 transitions. [2021-08-21 12:13:07,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 12:13:07,221 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:07,221 INFO L512 BasicCegarLoop]: trace histogram [3, 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 12:13:07,238 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-08-21 12:13:07,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-21 12:13:07,421 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:13:07,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:07,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1731197376, now seen corresponding path program 23 times [2021-08-21 12:13:07,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:07,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392864364] [2021-08-21 12:13:07,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:07,422 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:07,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:07,468 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-21 12:13:07,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:07,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392864364] [2021-08-21 12:13:07,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392864364] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:07,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555881224] [2021-08-21 12:13:07,468 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:13:07,468 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:07,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:07,469 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 12:13:07,471 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 12:13:07,859 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:13:07,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:07,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:13:07,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:08,005 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-21 12:13:08,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555881224] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:08,006 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:08,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-08-21 12:13:08,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972781426] [2021-08-21 12:13:08,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:13:08,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:08,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:13:08,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:13:08,007 INFO L87 Difference]: Start difference. First operand 23196 states and 156421 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:08,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:08,589 INFO L93 Difference]: Finished difference Result 33071 states and 218278 transitions. [2021-08-21 12:13:08,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:13:08,590 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 12:13:08,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:08,742 INFO L225 Difference]: With dead ends: 33071 [2021-08-21 12:13:08,742 INFO L226 Difference]: Without dead ends: 30169 [2021-08-21 12:13:08,743 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 43.7ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:13:08,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30169 states. [2021-08-21 12:13:09,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30169 to 22616. [2021-08-21 12:13:09,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22616 states, 22615 states have (on average 6.669865133760778) internal successors, (150839), 22615 states have internal predecessors, (150839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:09,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22616 states to 22616 states and 150839 transitions. [2021-08-21 12:13:09,811 INFO L78 Accepts]: Start accepts. Automaton has 22616 states and 150839 transitions. Word has length 32 [2021-08-21 12:13:09,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:09,811 INFO L470 AbstractCegarLoop]: Abstraction has 22616 states and 150839 transitions. [2021-08-21 12:13:09,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:09,811 INFO L276 IsEmpty]: Start isEmpty. Operand 22616 states and 150839 transitions. [2021-08-21 12:13:09,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 12:13:09,878 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:09,878 INFO L512 BasicCegarLoop]: trace histogram [3, 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 12:13:09,895 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-08-21 12:13:10,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:10,079 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:13:10,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:10,079 INFO L82 PathProgramCache]: Analyzing trace with hash 720080126, now seen corresponding path program 24 times [2021-08-21 12:13:10,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:10,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148592535] [2021-08-21 12:13:10,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:10,080 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:10,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:10,126 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-21 12:13:10,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:10,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148592535] [2021-08-21 12:13:10,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148592535] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:10,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043593274] [2021-08-21 12:13:10,127 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:13:10,127 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:10,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:10,141 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 12:13:10,147 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 12:13:10,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:13:10,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:10,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:13:10,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:10,897 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-21 12:13:10,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043593274] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:10,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:10,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-08-21 12:13:10,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985330642] [2021-08-21 12:13:10,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:13:10,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:10,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:13:10,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:13:10,898 INFO L87 Difference]: Start difference. First operand 22616 states and 150839 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:11,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:11,749 INFO L93 Difference]: Finished difference Result 45260 states and 297817 transitions. [2021-08-21 12:13:11,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:13:11,749 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 12:13:11,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:11,972 INFO L225 Difference]: With dead ends: 45260 [2021-08-21 12:13:11,972 INFO L226 Difference]: Without dead ends: 32476 [2021-08-21 12:13:11,972 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 127.0ms TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:13:12,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32476 states. [2021-08-21 12:13:12,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32476 to 19136. [2021-08-21 12:13:12,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19136 states, 19135 states have (on average 6.5872484975176375) internal successors, (126047), 19135 states have internal predecessors, (126047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:12,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19136 states to 19136 states and 126047 transitions. [2021-08-21 12:13:12,815 INFO L78 Accepts]: Start accepts. Automaton has 19136 states and 126047 transitions. Word has length 32 [2021-08-21 12:13:12,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:12,815 INFO L470 AbstractCegarLoop]: Abstraction has 19136 states and 126047 transitions. [2021-08-21 12:13:12,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:12,815 INFO L276 IsEmpty]: Start isEmpty. Operand 19136 states and 126047 transitions. [2021-08-21 12:13:12,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 12:13:12,869 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:12,869 INFO L512 BasicCegarLoop]: trace histogram [3, 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 12:13:12,886 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 12:13:13,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:13,077 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:13:13,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:13,077 INFO L82 PathProgramCache]: Analyzing trace with hash 451333698, now seen corresponding path program 25 times [2021-08-21 12:13:13,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:13,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406079799] [2021-08-21 12:13:13,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:13,078 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:13,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:13,129 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-21 12:13:13,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:13,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406079799] [2021-08-21 12:13:13,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406079799] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:13,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779339168] [2021-08-21 12:13:13,129 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:13:13,129 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:13,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:13,130 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 12:13:13,132 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 12:13:13,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:13,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:13:13,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:13,951 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-21 12:13:13,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779339168] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:13,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:13,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 12:13:13,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233187251] [2021-08-21 12:13:13,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:13:13,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:13,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:13:13,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:13:13,953 INFO L87 Difference]: Start difference. First operand 19136 states and 126047 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:14,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:14,308 INFO L93 Difference]: Finished difference Result 23779 states and 156788 transitions. [2021-08-21 12:13:14,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:13:14,309 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 12:13:14,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:14,408 INFO L225 Difference]: With dead ends: 23779 [2021-08-21 12:13:14,408 INFO L226 Difference]: Without dead ends: 22616 [2021-08-21 12:13:14,408 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 98.0ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:13:14,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22616 states. [2021-08-21 12:13:14,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22616 to 20296. [2021-08-21 12:13:15,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20296 states, 20295 states have (on average 6.589356984478936) internal successors, (133731), 20295 states have internal predecessors, (133731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:15,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20296 states to 20296 states and 133731 transitions. [2021-08-21 12:13:15,426 INFO L78 Accepts]: Start accepts. Automaton has 20296 states and 133731 transitions. Word has length 32 [2021-08-21 12:13:15,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:15,427 INFO L470 AbstractCegarLoop]: Abstraction has 20296 states and 133731 transitions. [2021-08-21 12:13:15,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:15,427 INFO L276 IsEmpty]: Start isEmpty. Operand 20296 states and 133731 transitions. [2021-08-21 12:13:15,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 12:13:15,519 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:15,519 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:15,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-21 12:13:15,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:15,743 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:13:15,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:15,744 INFO L82 PathProgramCache]: Analyzing trace with hash -72806561, now seen corresponding path program 26 times [2021-08-21 12:13:15,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:15,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311143368] [2021-08-21 12:13:15,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:15,744 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:15,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:15,857 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-21 12:13:15,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:15,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311143368] [2021-08-21 12:13:15,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311143368] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:15,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026135653] [2021-08-21 12:13:15,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:13:15,858 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:15,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:15,865 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 12:13:15,866 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 12:13:16,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:13:16,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:16,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 12:13:16,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:16,747 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-08-21 12:13:16,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026135653] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:16,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:16,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-08-21 12:13:16,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629989416] [2021-08-21 12:13:16,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:13:16,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:16,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:13:16,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:13:16,749 INFO L87 Difference]: Start difference. First operand 20296 states and 133731 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:18,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:18,301 INFO L93 Difference]: Finished difference Result 66256 states and 420935 transitions. [2021-08-21 12:13:18,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 12:13:18,302 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 12:13:18,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:18,683 INFO L225 Difference]: With dead ends: 66256 [2021-08-21 12:13:18,683 INFO L226 Difference]: Without dead ends: 59456 [2021-08-21 12:13:18,684 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 310.0ms TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:13:19,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59456 states. [2021-08-21 12:13:20,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59456 to 31835. [2021-08-21 12:13:20,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31835 states, 31834 states have (on average 6.805648049255513) internal successors, (216651), 31834 states have internal predecessors, (216651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:20,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31835 states to 31835 states and 216651 transitions. [2021-08-21 12:13:20,675 INFO L78 Accepts]: Start accepts. Automaton has 31835 states and 216651 transitions. Word has length 33 [2021-08-21 12:13:20,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:20,675 INFO L470 AbstractCegarLoop]: Abstraction has 31835 states and 216651 transitions. [2021-08-21 12:13:20,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:20,675 INFO L276 IsEmpty]: Start isEmpty. Operand 31835 states and 216651 transitions. [2021-08-21 12:13:20,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 12:13:20,800 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:20,800 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:13:20,818 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-08-21 12:13:21,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-08-21 12:13:21,000 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:13:21,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:21,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1800076997, now seen corresponding path program 27 times [2021-08-21 12:13:21,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:21,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129733327] [2021-08-21 12:13:21,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:21,001 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:21,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:21,068 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-21 12:13:21,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:21,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129733327] [2021-08-21 12:13:21,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129733327] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:21,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469210155] [2021-08-21 12:13:21,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:13:21,069 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:21,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:21,070 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 12:13:21,081 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 12:13:21,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:13:21,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:21,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 12:13:21,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:22,060 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-08-21 12:13:22,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469210155] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:22,060 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:22,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-08-21 12:13:22,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136642121] [2021-08-21 12:13:22,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:13:22,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:22,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:13:22,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:13:22,061 INFO L87 Difference]: Start difference. First operand 31835 states and 216651 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:23,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:23,598 INFO L93 Difference]: Finished difference Result 76452 states and 499137 transitions. [2021-08-21 12:13:23,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 12:13:23,599 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 12:13:23,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:24,375 INFO L225 Difference]: With dead ends: 76452 [2021-08-21 12:13:24,375 INFO L226 Difference]: Without dead ends: 71950 [2021-08-21 12:13:24,376 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 246.4ms TimeCoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:13:24,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71950 states. [2021-08-21 12:13:26,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71950 to 45299. [2021-08-21 12:13:26,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45299 states, 45298 states have (on average 7.045123405006843) internal successors, (319130), 45298 states have internal predecessors, (319130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:26,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45299 states to 45299 states and 319130 transitions. [2021-08-21 12:13:26,927 INFO L78 Accepts]: Start accepts. Automaton has 45299 states and 319130 transitions. Word has length 33 [2021-08-21 12:13:26,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:26,927 INFO L470 AbstractCegarLoop]: Abstraction has 45299 states and 319130 transitions. [2021-08-21 12:13:26,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:26,928 INFO L276 IsEmpty]: Start isEmpty. Operand 45299 states and 319130 transitions. [2021-08-21 12:13:27,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 12:13:27,096 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:27,096 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 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 12:13:27,113 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 12:13:27,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:27,297 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:13:27,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:27,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1235120450, now seen corresponding path program 28 times [2021-08-21 12:13:27,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:27,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047219588] [2021-08-21 12:13:27,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:27,298 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:27,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:27,344 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-08-21 12:13:27,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:27,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047219588] [2021-08-21 12:13:27,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047219588] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:27,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233915867] [2021-08-21 12:13:27,345 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:13:27,345 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:27,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:27,346 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 12:13:27,364 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 12:13:28,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:13:28,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:28,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:13:28,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:28,371 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-08-21 12:13:28,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233915867] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:28,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:28,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-08-21 12:13:28,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795237317] [2021-08-21 12:13:28,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:13:28,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:28,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:13:28,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:13:28,373 INFO L87 Difference]: Start difference. First operand 45299 states and 319130 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:29,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:29,328 INFO L93 Difference]: Finished difference Result 71328 states and 479587 transitions. [2021-08-21 12:13:29,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:13:29,328 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-21 12:13:29,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:30,050 INFO L225 Difference]: With dead ends: 71328 [2021-08-21 12:13:30,050 INFO L226 Difference]: Without dead ends: 61764 [2021-08-21 12:13:30,050 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 49.9ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:13:30,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61764 states. [2021-08-21 12:13:31,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61764 to 45298. [2021-08-21 12:13:31,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45298 states, 45297 states have (on average 6.9854957281939205) internal successors, (316422), 45297 states have internal predecessors, (316422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:32,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45298 states to 45298 states and 316422 transitions. [2021-08-21 12:13:32,083 INFO L78 Accepts]: Start accepts. Automaton has 45298 states and 316422 transitions. Word has length 34 [2021-08-21 12:13:32,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:32,083 INFO L470 AbstractCegarLoop]: Abstraction has 45298 states and 316422 transitions. [2021-08-21 12:13:32,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:32,083 INFO L276 IsEmpty]: Start isEmpty. Operand 45298 states and 316422 transitions. [2021-08-21 12:13:32,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 12:13:32,634 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:32,634 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 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 12:13:32,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-21 12:13:32,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:32,848 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:13:32,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:32,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1110638710, now seen corresponding path program 29 times [2021-08-21 12:13:32,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:32,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166569094] [2021-08-21 12:13:32,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:32,849 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:32,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:32,905 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-08-21 12:13:32,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:32,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166569094] [2021-08-21 12:13:32,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166569094] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:32,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993209883] [2021-08-21 12:13:32,906 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:13:32,906 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:32,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:32,907 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 12:13:32,931 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 12:13:33,440 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:13:33,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:33,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:13:33,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:33,580 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-08-21 12:13:33,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993209883] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:33,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:33,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 12:13:33,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216677914] [2021-08-21 12:13:33,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:13:33,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:33,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:13:33,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:13:33,582 INFO L87 Difference]: Start difference. First operand 45298 states and 316422 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:34,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:34,937 INFO L93 Difference]: Finished difference Result 79431 states and 527696 transitions. [2021-08-21 12:13:34,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:13:34,937 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-21 12:13:34,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:35,323 INFO L225 Difference]: With dead ends: 79431 [2021-08-21 12:13:35,324 INFO L226 Difference]: Without dead ends: 54866 [2021-08-21 12:13:35,324 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 103.7ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:13:35,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54866 states. [2021-08-21 12:13:36,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54866 to 40122. [2021-08-21 12:13:36,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40122 states, 40121 states have (on average 6.923107599511478) internal successors, (277762), 40121 states have internal predecessors, (277762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:37,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40122 states to 40122 states and 277762 transitions. [2021-08-21 12:13:37,549 INFO L78 Accepts]: Start accepts. Automaton has 40122 states and 277762 transitions. Word has length 34 [2021-08-21 12:13:37,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:37,549 INFO L470 AbstractCegarLoop]: Abstraction has 40122 states and 277762 transitions. [2021-08-21 12:13:37,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:37,549 INFO L276 IsEmpty]: Start isEmpty. Operand 40122 states and 277762 transitions. [2021-08-21 12:13:37,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 12:13:37,732 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:37,732 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 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 12:13:37,757 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 12:13:37,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-21 12:13:37,949 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:13:37,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:37,949 INFO L82 PathProgramCache]: Analyzing trace with hash -446438244, now seen corresponding path program 30 times [2021-08-21 12:13:37,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:37,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924897229] [2021-08-21 12:13:37,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:37,950 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:37,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:37,990 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-21 12:13:37,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:37,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924897229] [2021-08-21 12:13:37,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924897229] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:37,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785881920] [2021-08-21 12:13:37,990 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:13:37,990 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:37,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:37,991 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 12:13:37,992 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 12:13:38,498 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:13:38,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:38,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:13:38,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:38,659 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-08-21 12:13:38,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785881920] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:38,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:38,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-08-21 12:13:38,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613043368] [2021-08-21 12:13:38,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:13:38,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:38,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:13:38,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:13:38,660 INFO L87 Difference]: Start difference. First operand 40122 states and 277762 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:40,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:40,099 INFO L93 Difference]: Finished difference Result 85865 states and 563740 transitions. [2021-08-21 12:13:40,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:13:40,100 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-21 12:13:40,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:40,558 INFO L225 Difference]: With dead ends: 85865 [2021-08-21 12:13:40,558 INFO L226 Difference]: Without dead ends: 62787 [2021-08-21 12:13:40,558 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 75.0ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:13:40,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62787 states. [2021-08-21 12:13:42,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62787 to 39220. [2021-08-21 12:13:42,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39220 states, 39219 states have (on average 6.795660266707463) internal successors, (266519), 39219 states have internal predecessors, (266519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:42,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39220 states to 39220 states and 266519 transitions. [2021-08-21 12:13:42,760 INFO L78 Accepts]: Start accepts. Automaton has 39220 states and 266519 transitions. Word has length 34 [2021-08-21 12:13:42,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:42,760 INFO L470 AbstractCegarLoop]: Abstraction has 39220 states and 266519 transitions. [2021-08-21 12:13:42,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:42,761 INFO L276 IsEmpty]: Start isEmpty. Operand 39220 states and 266519 transitions. [2021-08-21 12:13:42,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 12:13:42,892 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:42,892 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 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 12:13:42,914 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 12:13:43,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-21 12:13:43,101 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:13:43,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:43,102 INFO L82 PathProgramCache]: Analyzing trace with hash 422116352, now seen corresponding path program 31 times [2021-08-21 12:13:43,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:43,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592778552] [2021-08-21 12:13:43,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:43,102 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:43,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:43,141 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-08-21 12:13:43,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:43,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592778552] [2021-08-21 12:13:43,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592778552] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:43,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296623143] [2021-08-21 12:13:43,142 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:13:43,142 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:43,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:43,142 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 12:13:43,143 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 12:13:43,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:43,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:13:43,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:44,135 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-08-21 12:13:44,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296623143] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:44,135 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:44,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-08-21 12:13:44,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506036573] [2021-08-21 12:13:44,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:13:44,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:44,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:13:44,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:13:44,137 INFO L87 Difference]: Start difference. First operand 39220 states and 266519 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:45,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:45,168 INFO L93 Difference]: Finished difference Result 76848 states and 503197 transitions. [2021-08-21 12:13:45,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:13:45,169 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-21 12:13:45,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:45,865 INFO L225 Difference]: With dead ends: 76848 [2021-08-21 12:13:45,865 INFO L226 Difference]: Without dead ends: 55886 [2021-08-21 12:13:45,865 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 61.5ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:13:45,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55886 states. [2021-08-21 12:13:47,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55886 to 36632. [2021-08-21 12:13:47,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36632 states, 36631 states have (on average 6.734159591602741) internal successors, (246679), 36631 states have internal predecessors, (246679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:47,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36632 states to 36632 states and 246679 transitions. [2021-08-21 12:13:47,692 INFO L78 Accepts]: Start accepts. Automaton has 36632 states and 246679 transitions. Word has length 34 [2021-08-21 12:13:47,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:47,692 INFO L470 AbstractCegarLoop]: Abstraction has 36632 states and 246679 transitions. [2021-08-21 12:13:47,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:47,692 INFO L276 IsEmpty]: Start isEmpty. Operand 36632 states and 246679 transitions. [2021-08-21 12:13:47,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 12:13:47,815 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:47,815 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 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 12:13:47,833 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 12:13:48,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-21 12:13:48,016 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:13:48,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:48,016 INFO L82 PathProgramCache]: Analyzing trace with hash -87356738, now seen corresponding path program 32 times [2021-08-21 12:13:48,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:48,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279406040] [2021-08-21 12:13:48,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:48,017 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:48,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:48,065 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-08-21 12:13:48,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:48,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279406040] [2021-08-21 12:13:48,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279406040] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:48,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296851640] [2021-08-21 12:13:48,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:13:48,068 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:48,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:48,068 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 12:13:48,084 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 12:13:49,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:13:49,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:49,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:13:49,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:13:49,167 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-08-21 12:13:49,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296851640] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:49,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:13:49,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-21 12:13:49,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738802950] [2021-08-21 12:13:49,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:13:49,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:13:49,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:13:49,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:13:49,168 INFO L87 Difference]: Start difference. First operand 36632 states and 246679 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:50,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:13:50,091 INFO L93 Difference]: Finished difference Result 57373 states and 381185 transitions. [2021-08-21 12:13:50,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:13:50,092 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-21 12:13:50,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:13:50,432 INFO L225 Difference]: With dead ends: 57373 [2021-08-21 12:13:50,433 INFO L226 Difference]: Without dead ends: 52868 [2021-08-21 12:13:50,433 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 90.3ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:13:50,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52868 states. [2021-08-21 12:13:51,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52868 to 36632. [2021-08-21 12:13:52,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36632 states, 36631 states have (on average 6.734159591602741) internal successors, (246679), 36631 states have internal predecessors, (246679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:52,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36632 states to 36632 states and 246679 transitions. [2021-08-21 12:13:52,350 INFO L78 Accepts]: Start accepts. Automaton has 36632 states and 246679 transitions. Word has length 34 [2021-08-21 12:13:52,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:13:52,351 INFO L470 AbstractCegarLoop]: Abstraction has 36632 states and 246679 transitions. [2021-08-21 12:13:52,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:13:52,351 INFO L276 IsEmpty]: Start isEmpty. Operand 36632 states and 246679 transitions. [2021-08-21 12:13:52,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 12:13:52,943 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:13:52,943 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 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 12:13:53,009 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 12:13:53,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-21 12:13:53,173 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 12:13:53,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:13:53,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1127109322, now seen corresponding path program 33 times [2021-08-21 12:13:53,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:13:53,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169229841] [2021-08-21 12:13:53,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:13:53,174 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:13:53,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:13:53,253 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-08-21 12:13:53,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:13:53,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169229841] [2021-08-21 12:13:53,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169229841] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:13:53,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966054236] [2021-08-21 12:13:53,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:13:53,254 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:13:53,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:13:53,257 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 12:13:53,284 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 12:13:53,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:13:53,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:13:53,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:13:53,842 INFO L286 TraceCheckSpWp]: Computing forward predicates...