/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-series-array.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 18:24:30,799 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 18:24:30,801 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 18:24:30,822 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-21 18:24:30,822 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-21 18:24:30,823 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-21 18:24:30,824 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-21 18:24:30,825 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-21 18:24:30,832 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-21 18:24:30,833 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-21 18:24:30,834 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-21 18:24:30,835 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-21 18:24:30,835 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-21 18:24:30,836 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-21 18:24:30,836 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-21 18:24:30,837 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-21 18:24:30,838 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-21 18:24:30,838 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-21 18:24:30,840 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-21 18:24:30,841 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-21 18:24:30,842 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-21 18:24:30,843 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-21 18:24:30,844 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-21 18:24:30,844 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-21 18:24:30,846 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-21 18:24:30,851 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 18:24:30,852 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 18:24:30,852 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 18:24:30,853 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf [2021-08-21 18:24:30,884 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 18:24:30,884 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 18:24:30,885 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 18:24:30,885 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 18:24:30,885 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 18:24:30,885 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 18:24:30,885 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 18:24:30,885 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 18:24:30,885 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 18:24:30,886 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 18:24:30,886 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 18:24:30,886 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 18:24:30,886 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 18:24:30,886 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 18:24:30,886 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 18:24:30,886 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 18:24:30,886 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 18:24:30,887 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 18:24:30,887 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 18:24:30,887 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 18:24:30,887 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 18:24:30,887 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 18:24:30,887 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 18:24:30,887 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 18:24:30,887 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 18:24:30,888 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 18:24:30,888 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 18:24:30,888 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 18:24:30,888 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 18:24:30,888 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-21 18:24:30,888 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 18:24:31,159 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 18:24:31,181 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 18:24:31,182 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 18:24:31,183 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 18:24:31,184 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 18:24:31,184 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-series-array.wvr.bpl [2021-08-21 18:24:31,185 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-series-array.wvr.bpl' [2021-08-21 18:24:31,209 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 18:24:31,210 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 18:24:31,221 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 18:24:31,221 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 18:24:31,221 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 18:24:31,230 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:24:31" (1/1) ... [2021-08-21 18:24:31,236 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:24:31" (1/1) ... [2021-08-21 18:24:31,242 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 18:24:31,244 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 18:24:31,244 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 18:24:31,244 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 18:24:31,249 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:24:31" (1/1) ... [2021-08-21 18:24:31,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:24:31" (1/1) ... [2021-08-21 18:24:31,251 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:24:31" (1/1) ... [2021-08-21 18:24:31,251 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:24:31" (1/1) ... [2021-08-21 18:24:31,258 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:24:31" (1/1) ... [2021-08-21 18:24:31,270 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:24:31" (1/1) ... [2021-08-21 18:24:31,270 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:24:31" (1/1) ... [2021-08-21 18:24:31,271 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 18:24:31,272 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 18:24:31,272 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 18:24:31,272 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 18:24:31,285 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:24:31" (1/1) ... [2021-08-21 18:24:31,290 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 18:24:31,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:24:31,317 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-21 18:24:31,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-21 18:24:31,348 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 18:24:31,348 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 18:24:31,348 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 18:24:31,348 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 18:24:31,348 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 18:24:31,348 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 18:24:31,348 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 18:24:31,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 18:24:31,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 18:24:31,348 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-21 18:24:31,349 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-21 18:24:31,349 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-21 18:24:31,349 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-08-21 18:24:31,349 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-08-21 18:24:31,349 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-08-21 18:24:31,349 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-21 18:24:31,541 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 18:24:31,542 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-21 18:24:31,543 INFO L202 PluginConnector]: Adding new model buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:24:31 BoogieIcfgContainer [2021-08-21 18:24:31,543 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 18:24:31,544 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 18:24:31,544 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 18:24:31,546 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 18:24:31,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:24:31" (1/2) ... [2021-08-21 18:24:31,547 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b8c11a9 and model type buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:24:31, skipping insertion in model container [2021-08-21 18:24:31,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:24:31" (2/2) ... [2021-08-21 18:24:31,548 INFO L111 eAbstractionObserver]: Analyzing ICFG buffer-series-array.wvr.bpl [2021-08-21 18:24:31,551 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 18:24:31,551 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 18:24:31,551 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 18:24:31,551 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 18:24:31,600 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-08-21 18:24:31,626 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 18:24:31,630 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-21 18:24:31,630 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-08-21 18:24:31,883 INFO L276 IsEmpty]: Start isEmpty. Operand has 635 states, 444 states have (on average 2.1531531531531534) internal successors, (956), 634 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:31,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 18:24:31,911 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:24:31,911 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:24:31,912 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:24:31,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:24:31,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1811222286, now seen corresponding path program 1 times [2021-08-21 18:24:31,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:24:31,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467337421] [2021-08-21 18:24:31,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:24:31,923 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:24:31,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:24:32,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:24:32,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:24:32,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467337421] [2021-08-21 18:24:32,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467337421] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:24:32,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118954042] [2021-08-21 18:24:32,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:24:32,042 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:24:32,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:24:32,043 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:24:32,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-21 18:24:32,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:24:32,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-21 18:24:32,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:24:32,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:24:32,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118954042] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:24:32,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-21 18:24:32,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-08-21 18:24:32,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184575166] [2021-08-21 18:24:32,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 18:24:32,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:24:32,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 18:24:32,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:24:32,185 INFO L87 Difference]: Start difference. First operand has 635 states, 444 states have (on average 2.1531531531531534) internal successors, (956), 634 states have internal predecessors, (956), 0 states have call successors, (0), 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 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:32,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:24:32,234 INFO L93 Difference]: Finished difference Result 635 states and 916 transitions. [2021-08-21 18:24:32,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 18:24:32,236 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 18:24:32,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:24:32,246 INFO L225 Difference]: With dead ends: 635 [2021-08-21 18:24:32,246 INFO L226 Difference]: Without dead ends: 144 [2021-08-21 18:24:32,247 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:24:32,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-08-21 18:24:32,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2021-08-21 18:24:32,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.8391608391608392) internal successors, (263), 143 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:32,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 263 transitions. [2021-08-21 18:24:32,304 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 263 transitions. Word has length 24 [2021-08-21 18:24:32,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:24:32,305 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 263 transitions. [2021-08-21 18:24:32,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:32,305 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 263 transitions. [2021-08-21 18:24:32,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:24:32,306 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:24:32,306 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:24:32,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-21 18:24:32,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-08-21 18:24:32,507 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:24:32,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:24:32,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1940999982, now seen corresponding path program 2 times [2021-08-21 18:24:32,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:24:32,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966789853] [2021-08-21 18:24:32,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:24:32,508 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:24:32,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:24:32,560 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:24:32,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:24:32,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966789853] [2021-08-21 18:24:32,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966789853] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:24:32,561 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:24:32,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:24:32,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149718005] [2021-08-21 18:24:32,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:24:32,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:24:32,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:24:32,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:24:32,563 INFO L87 Difference]: Start difference. First operand 144 states and 263 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:32,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:24:32,604 INFO L93 Difference]: Finished difference Result 192 states and 341 transitions. [2021-08-21 18:24:32,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:24:32,604 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:24:32,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:24:32,608 INFO L225 Difference]: With dead ends: 192 [2021-08-21 18:24:32,608 INFO L226 Difference]: Without dead ends: 187 [2021-08-21 18:24:32,608 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:24:32,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-08-21 18:24:32,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 170. [2021-08-21 18:24:32,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.816568047337278) internal successors, (307), 169 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:32,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 307 transitions. [2021-08-21 18:24:32,629 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 307 transitions. Word has length 26 [2021-08-21 18:24:32,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:24:32,629 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 307 transitions. [2021-08-21 18:24:32,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:32,630 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 307 transitions. [2021-08-21 18:24:32,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:24:32,630 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:24:32,630 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:24:32,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 18:24:32,631 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:24:32,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:24:32,631 INFO L82 PathProgramCache]: Analyzing trace with hash 2123196562, now seen corresponding path program 3 times [2021-08-21 18:24:32,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:24:32,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211472021] [2021-08-21 18:24:32,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:24:32,631 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:24:32,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:24:32,695 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:24:32,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:24:32,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211472021] [2021-08-21 18:24:32,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211472021] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:24:32,696 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:24:32,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:24:32,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650555686] [2021-08-21 18:24:32,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:24:32,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:24:32,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:24:32,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:24:32,697 INFO L87 Difference]: Start difference. First operand 170 states and 307 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:32,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:24:32,746 INFO L93 Difference]: Finished difference Result 206 states and 369 transitions. [2021-08-21 18:24:32,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:24:32,746 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:24:32,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:24:32,748 INFO L225 Difference]: With dead ends: 206 [2021-08-21 18:24:32,748 INFO L226 Difference]: Without dead ends: 206 [2021-08-21 18:24:32,748 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:24:32,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-08-21 18:24:32,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 187. [2021-08-21 18:24:32,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 1.8118279569892473) internal successors, (337), 186 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:32,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 337 transitions. [2021-08-21 18:24:32,758 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 337 transitions. Word has length 26 [2021-08-21 18:24:32,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:24:32,758 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 337 transitions. [2021-08-21 18:24:32,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:32,758 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 337 transitions. [2021-08-21 18:24:32,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:24:32,759 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:24:32,759 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 18:24:32,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 18:24:32,759 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:24:32,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:24:32,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1174364130, now seen corresponding path program 1 times [2021-08-21 18:24:32,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:24:32,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021917096] [2021-08-21 18:24:32,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:24:32,760 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:24:32,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:24:32,792 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 18:24:32,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:24:32,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021917096] [2021-08-21 18:24:32,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021917096] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:24:32,792 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:24:32,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:24:32,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588171790] [2021-08-21 18:24:32,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:24:32,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:24:32,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:24:32,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:24:32,793 INFO L87 Difference]: Start difference. First operand 187 states and 337 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:32,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:24:32,813 INFO L93 Difference]: Finished difference Result 279 states and 512 transitions. [2021-08-21 18:24:32,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:24:32,813 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:24:32,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:24:32,814 INFO L225 Difference]: With dead ends: 279 [2021-08-21 18:24:32,814 INFO L226 Difference]: Without dead ends: 279 [2021-08-21 18:24:32,814 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:24:32,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-08-21 18:24:32,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 233. [2021-08-21 18:24:32,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 1.8577586206896552) internal successors, (431), 232 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:32,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 431 transitions. [2021-08-21 18:24:32,820 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 431 transitions. Word has length 29 [2021-08-21 18:24:32,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:24:32,820 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 431 transitions. [2021-08-21 18:24:32,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:32,820 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 431 transitions. [2021-08-21 18:24:32,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:24:32,821 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:24:32,821 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:24:32,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-21 18:24:32,822 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:24:32,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:24:32,822 INFO L82 PathProgramCache]: Analyzing trace with hash -859912484, now seen corresponding path program 1 times [2021-08-21 18:24:32,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:24:32,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845591113] [2021-08-21 18:24:32,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:24:32,823 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:24:32,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:24:33,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:24:33,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:24:33,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845591113] [2021-08-21 18:24:33,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845591113] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:24:33,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485302634] [2021-08-21 18:24:33,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:24:33,082 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:24:33,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:24:33,086 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:24:33,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-21 18:24:33,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:24:33,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:24:33,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:24:33,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-08-21 18:24:33,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-08-21 18:24:33,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:24:33,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485302634] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:24:33,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:24:33,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-08-21 18:24:33,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120997587] [2021-08-21 18:24:33,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 18:24:33,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:24:33,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 18:24:33,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:24:33,537 INFO L87 Difference]: Start difference. First operand 233 states and 431 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:33,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:24:33,654 INFO L93 Difference]: Finished difference Result 611 states and 1165 transitions. [2021-08-21 18:24:33,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:24:33,654 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 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 18:24:33,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:24:33,658 INFO L225 Difference]: With dead ends: 611 [2021-08-21 18:24:33,658 INFO L226 Difference]: Without dead ends: 601 [2021-08-21 18:24:33,658 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 87.3ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:24:33,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-08-21 18:24:33,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 299. [2021-08-21 18:24:33,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 1.919463087248322) internal successors, (572), 298 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:33,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 572 transitions. [2021-08-21 18:24:33,668 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 572 transitions. Word has length 29 [2021-08-21 18:24:33,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:24:33,669 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 572 transitions. [2021-08-21 18:24:33,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:33,669 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 572 transitions. [2021-08-21 18:24:33,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:24:33,671 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:24:33,672 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:24:33,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-21 18:24:33,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:24:33,889 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:24:33,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:24:33,889 INFO L82 PathProgramCache]: Analyzing trace with hash -743388768, now seen corresponding path program 2 times [2021-08-21 18:24:33,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:24:33,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829303392] [2021-08-21 18:24:33,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:24:33,890 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:24:33,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:24:33,935 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:24:33,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:24:33,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829303392] [2021-08-21 18:24:33,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829303392] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:24:33,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618820648] [2021-08-21 18:24:33,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:24:33,936 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:24:33,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:24:33,938 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:24:33,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-21 18:24:34,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:24:34,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:24:34,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 18:24:34,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:24:34,120 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:24:34,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618820648] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:24:34,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-21 18:24:34,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-08-21 18:24:34,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603522132] [2021-08-21 18:24:34,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:24:34,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:24:34,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:24:34,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:24:34,121 INFO L87 Difference]: Start difference. First operand 299 states and 572 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:34,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:24:34,135 INFO L93 Difference]: Finished difference Result 691 states and 1270 transitions. [2021-08-21 18:24:34,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:24:34,137 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have 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 18:24:34,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:24:34,139 INFO L225 Difference]: With dead ends: 691 [2021-08-21 18:24:34,139 INFO L226 Difference]: Without dead ends: 685 [2021-08-21 18:24:34,140 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.4ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:24:34,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-08-21 18:24:34,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 610. [2021-08-21 18:24:34,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 609 states have (on average 1.935960591133005) internal successors, (1179), 609 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:34,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 1179 transitions. [2021-08-21 18:24:34,152 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 1179 transitions. Word has length 31 [2021-08-21 18:24:34,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:24:34,152 INFO L470 AbstractCegarLoop]: Abstraction has 610 states and 1179 transitions. [2021-08-21 18:24:34,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:34,152 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 1179 transitions. [2021-08-21 18:24:34,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:24:34,153 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:24:34,154 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:24:34,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-21 18:24:34,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:24:34,357 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:24:34,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:24:34,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1348073246, now seen corresponding path program 3 times [2021-08-21 18:24:34,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:24:34,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772059169] [2021-08-21 18:24:34,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:24:34,358 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:24:34,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:24:34,389 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:24:34,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:24:34,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772059169] [2021-08-21 18:24:34,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772059169] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:24:34,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:24:34,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:24:34,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987750964] [2021-08-21 18:24:34,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:24:34,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:24:34,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:24:34,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:24:34,394 INFO L87 Difference]: Start difference. First operand 610 states and 1179 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:34,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:24:34,415 INFO L93 Difference]: Finished difference Result 1558 states and 2910 transitions. [2021-08-21 18:24:34,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:24:34,416 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 18:24:34,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:24:34,423 INFO L225 Difference]: With dead ends: 1558 [2021-08-21 18:24:34,423 INFO L226 Difference]: Without dead ends: 1526 [2021-08-21 18:24:34,424 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.3ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:24:34,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1526 states. [2021-08-21 18:24:34,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1526 to 1083. [2021-08-21 18:24:34,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1083 states, 1082 states have (on average 1.9981515711645101) internal successors, (2162), 1082 states have internal predecessors, (2162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:34,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1083 states to 1083 states and 2162 transitions. [2021-08-21 18:24:34,450 INFO L78 Accepts]: Start accepts. Automaton has 1083 states and 2162 transitions. Word has length 31 [2021-08-21 18:24:34,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:24:34,450 INFO L470 AbstractCegarLoop]: Abstraction has 1083 states and 2162 transitions. [2021-08-21 18:24:34,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:34,451 INFO L276 IsEmpty]: Start isEmpty. Operand 1083 states and 2162 transitions. [2021-08-21 18:24:34,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:24:34,452 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:24:34,453 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, 1, 1] [2021-08-21 18:24:34,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-21 18:24:34,453 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:24:34,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:24:34,453 INFO L82 PathProgramCache]: Analyzing trace with hash 250942127, now seen corresponding path program 4 times [2021-08-21 18:24:34,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:24:34,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337868929] [2021-08-21 18:24:34,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:24:34,454 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:24:34,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:24:34,481 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:24:34,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:24:34,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337868929] [2021-08-21 18:24:34,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337868929] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:24:34,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899770921] [2021-08-21 18:24:34,482 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:24:34,482 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:24:34,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:24:34,483 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:24:34,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-21 18:24:34,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:24:34,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:24:34,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 18:24:34,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:24:34,725 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:24:34,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899770921] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:24:34,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:24:34,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-08-21 18:24:34,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023227909] [2021-08-21 18:24:34,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 18:24:34,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:24:34,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 18:24:34,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:24:34,727 INFO L87 Difference]: Start difference. First operand 1083 states and 2162 transitions. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 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 18:24:34,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:24:34,933 INFO L93 Difference]: Finished difference Result 2662 states and 5238 transitions. [2021-08-21 18:24:34,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 18:24:34,933 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 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 32 [2021-08-21 18:24:34,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:24:34,941 INFO L225 Difference]: With dead ends: 2662 [2021-08-21 18:24:34,941 INFO L226 Difference]: Without dead ends: 2662 [2021-08-21 18:24:34,942 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 82.4ms TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:24:34,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2662 states. [2021-08-21 18:24:34,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2662 to 2045. [2021-08-21 18:24:34,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2045 states, 2044 states have (on average 1.9657534246575343) internal successors, (4018), 2044 states have internal predecessors, (4018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:34,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2045 states to 2045 states and 4018 transitions. [2021-08-21 18:24:34,986 INFO L78 Accepts]: Start accepts. Automaton has 2045 states and 4018 transitions. Word has length 32 [2021-08-21 18:24:34,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:24:34,987 INFO L470 AbstractCegarLoop]: Abstraction has 2045 states and 4018 transitions. [2021-08-21 18:24:34,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 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 18:24:34,987 INFO L276 IsEmpty]: Start isEmpty. Operand 2045 states and 4018 transitions. [2021-08-21 18:24:34,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 18:24:34,991 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:24:34,991 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:24:35,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-21 18:24:35,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:24:35,207 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:24:35,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:24:35,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1336890539, now seen corresponding path program 5 times [2021-08-21 18:24:35,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:24:35,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85986168] [2021-08-21 18:24:35,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:24:35,208 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:24:35,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:24:35,241 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:24:35,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:24:35,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85986168] [2021-08-21 18:24:35,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85986168] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:24:35,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189944706] [2021-08-21 18:24:35,242 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:24:35,242 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:24:35,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:24:35,245 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:24:35,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-21 18:24:35,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:24:35,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:24:35,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 18:24:35,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:24:35,539 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:24:35,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189944706] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:24:35,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:24:35,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-08-21 18:24:35,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557161689] [2021-08-21 18:24:35,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 18:24:35,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:24:35,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 18:24:35,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:24:35,543 INFO L87 Difference]: Start difference. First operand 2045 states and 4018 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:35,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:24:35,741 INFO L93 Difference]: Finished difference Result 5361 states and 10243 transitions. [2021-08-21 18:24:35,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 18:24:35,741 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-21 18:24:35,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:24:35,756 INFO L225 Difference]: With dead ends: 5361 [2021-08-21 18:24:35,756 INFO L226 Difference]: Without dead ends: 5169 [2021-08-21 18:24:35,757 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 69.8ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:24:35,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5169 states. [2021-08-21 18:24:35,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5169 to 4055. [2021-08-21 18:24:35,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4055 states, 4054 states have (on average 1.9711396151948692) internal successors, (7991), 4054 states have internal predecessors, (7991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:35,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4055 states to 4055 states and 7991 transitions. [2021-08-21 18:24:35,856 INFO L78 Accepts]: Start accepts. Automaton has 4055 states and 7991 transitions. Word has length 34 [2021-08-21 18:24:35,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:24:35,856 INFO L470 AbstractCegarLoop]: Abstraction has 4055 states and 7991 transitions. [2021-08-21 18:24:35,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:35,857 INFO L276 IsEmpty]: Start isEmpty. Operand 4055 states and 7991 transitions. [2021-08-21 18:24:35,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 18:24:35,865 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:24:35,865 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:24:35,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-21 18:24:36,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:24:36,083 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:24:36,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:24:36,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1567661291, now seen corresponding path program 6 times [2021-08-21 18:24:36,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:24:36,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515396538] [2021-08-21 18:24:36,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:24:36,084 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:24:36,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:24:36,120 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:24:36,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:24:36,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515396538] [2021-08-21 18:24:36,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515396538] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:24:36,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861462219] [2021-08-21 18:24:36,122 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:24:36,122 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:24:36,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:24:36,123 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:24:36,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-21 18:24:36,262 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:24:36,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:24:36,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 18:24:36,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:24:36,428 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:24:36,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861462219] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:24:36,428 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:24:36,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-08-21 18:24:36,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537732399] [2021-08-21 18:24:36,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 18:24:36,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:24:36,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 18:24:36,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:24:36,431 INFO L87 Difference]: Start difference. First operand 4055 states and 7991 transitions. Second operand has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:36,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:24:36,617 INFO L93 Difference]: Finished difference Result 5117 states and 9806 transitions. [2021-08-21 18:24:36,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 18:24:36,618 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 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 34 [2021-08-21 18:24:36,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:24:36,632 INFO L225 Difference]: With dead ends: 5117 [2021-08-21 18:24:36,633 INFO L226 Difference]: Without dead ends: 4812 [2021-08-21 18:24:36,633 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 82.7ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:24:36,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4812 states. [2021-08-21 18:24:36,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4812 to 3773. [2021-08-21 18:24:36,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3773 states, 3772 states have (on average 1.9745493107104983) internal successors, (7448), 3772 states have internal predecessors, (7448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:36,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3773 states to 3773 states and 7448 transitions. [2021-08-21 18:24:36,724 INFO L78 Accepts]: Start accepts. Automaton has 3773 states and 7448 transitions. Word has length 34 [2021-08-21 18:24:36,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:24:36,725 INFO L470 AbstractCegarLoop]: Abstraction has 3773 states and 7448 transitions. [2021-08-21 18:24:36,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:36,725 INFO L276 IsEmpty]: Start isEmpty. Operand 3773 states and 7448 transitions. [2021-08-21 18:24:36,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 18:24:36,731 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:24:36,731 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:24:36,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-21 18:24:36,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:24:36,937 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:24:36,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:24:36,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1009805525, now seen corresponding path program 7 times [2021-08-21 18:24:36,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:24:36,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927767986] [2021-08-21 18:24:36,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:24:36,937 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:24:36,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:24:36,965 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:24:36,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:24:36,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927767986] [2021-08-21 18:24:36,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927767986] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:24:36,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959097942] [2021-08-21 18:24:36,966 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:24:36,966 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:24:36,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:24:36,966 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:24:36,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-21 18:24:37,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:24:37,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 18:24:37,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:24:37,282 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:24:37,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959097942] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:24:37,282 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:24:37,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-21 18:24:37,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817037195] [2021-08-21 18:24:37,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 18:24:37,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:24:37,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 18:24:37,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:24:37,283 INFO L87 Difference]: Start difference. First operand 3773 states and 7448 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:37,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:24:37,486 INFO L93 Difference]: Finished difference Result 6387 states and 12548 transitions. [2021-08-21 18:24:37,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 18:24:37,493 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 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 34 [2021-08-21 18:24:37,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:24:37,519 INFO L225 Difference]: With dead ends: 6387 [2021-08-21 18:24:37,520 INFO L226 Difference]: Without dead ends: 6170 [2021-08-21 18:24:37,520 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 85.4ms TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:24:37,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6170 states. [2021-08-21 18:24:37,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6170 to 5585. [2021-08-21 18:24:37,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5585 states, 5584 states have (on average 1.9980300859598854) internal successors, (11157), 5584 states have internal predecessors, (11157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:37,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5585 states to 5585 states and 11157 transitions. [2021-08-21 18:24:37,615 INFO L78 Accepts]: Start accepts. Automaton has 5585 states and 11157 transitions. Word has length 34 [2021-08-21 18:24:37,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:24:37,616 INFO L470 AbstractCegarLoop]: Abstraction has 5585 states and 11157 transitions. [2021-08-21 18:24:37,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:37,616 INFO L276 IsEmpty]: Start isEmpty. Operand 5585 states and 11157 transitions. [2021-08-21 18:24:37,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 18:24:37,626 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:24:37,626 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:24:37,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-21 18:24:37,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:24:37,841 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:24:37,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:24:37,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1117564082, now seen corresponding path program 8 times [2021-08-21 18:24:37,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:24:37,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622115620] [2021-08-21 18:24:37,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:24:37,842 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:24:37,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:24:37,868 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:24:37,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:24:37,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622115620] [2021-08-21 18:24:37,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622115620] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:24:37,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718282434] [2021-08-21 18:24:37,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:24:37,869 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:24:37,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:24:37,869 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:24:37,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-21 18:24:38,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:24:38,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:24:38,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 18:24:38,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:24:38,259 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:24:38,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718282434] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:24:38,259 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:24:38,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-21 18:24:38,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102210188] [2021-08-21 18:24:38,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 18:24:38,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:24:38,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 18:24:38,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:24:38,261 INFO L87 Difference]: Start difference. First operand 5585 states and 11157 transitions. Second operand has 10 states, 10 states have (on average 5.9) internal successors, (59), 9 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 18:24:38,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:24:38,509 INFO L93 Difference]: Finished difference Result 11936 states and 23639 transitions. [2021-08-21 18:24:38,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 18:24:38,509 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.9) internal successors, (59), 9 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 34 [2021-08-21 18:24:38,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:24:38,534 INFO L225 Difference]: With dead ends: 11936 [2021-08-21 18:24:38,534 INFO L226 Difference]: Without dead ends: 11878 [2021-08-21 18:24:38,534 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 97.9ms TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:24:38,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11878 states. [2021-08-21 18:24:38,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11878 to 8722. [2021-08-21 18:24:38,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8722 states, 8721 states have (on average 2.0335970645568167) internal successors, (17735), 8721 states have internal predecessors, (17735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:38,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8722 states to 8722 states and 17735 transitions. [2021-08-21 18:24:38,714 INFO L78 Accepts]: Start accepts. Automaton has 8722 states and 17735 transitions. Word has length 34 [2021-08-21 18:24:38,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:24:38,715 INFO L470 AbstractCegarLoop]: Abstraction has 8722 states and 17735 transitions. [2021-08-21 18:24:38,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.9) internal successors, (59), 9 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 18:24:38,715 INFO L276 IsEmpty]: Start isEmpty. Operand 8722 states and 17735 transitions. [2021-08-21 18:24:38,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:24:38,731 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:24:38,731 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:24:38,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-21 18:24:38,947 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,SelfDestructingSolverStorable11 [2021-08-21 18:24:38,948 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:24:38,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:24:38,948 INFO L82 PathProgramCache]: Analyzing trace with hash -2064347487, now seen corresponding path program 9 times [2021-08-21 18:24:38,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:24:38,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812091579] [2021-08-21 18:24:38,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:24:38,948 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:24:38,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:24:38,978 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 18:24:38,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:24:38,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812091579] [2021-08-21 18:24:38,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812091579] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:24:38,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261068318] [2021-08-21 18:24:38,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:24:38,978 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:24:38,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:24:38,981 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:24:39,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-21 18:24:39,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:24:39,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:24:39,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 18:24:39,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:24:39,236 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 18:24:39,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261068318] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:24:39,236 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:24:39,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-08-21 18:24:39,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712029281] [2021-08-21 18:24:39,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:24:39,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:24:39,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:24:39,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:24:39,237 INFO L87 Difference]: Start difference. First operand 8722 states and 17735 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:39,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:24:39,287 INFO L93 Difference]: Finished difference Result 13540 states and 27229 transitions. [2021-08-21 18:24:39,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:24:39,287 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 18:24:39,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:24:39,314 INFO L225 Difference]: With dead ends: 13540 [2021-08-21 18:24:39,314 INFO L226 Difference]: Without dead ends: 13540 [2021-08-21 18:24:39,315 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 14.2ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:24:39,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13540 states. [2021-08-21 18:24:39,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13540 to 11586. [2021-08-21 18:24:39,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11586 states, 11585 states have (on average 2.00785498489426) internal successors, (23261), 11585 states have internal predecessors, (23261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:39,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11586 states to 11586 states and 23261 transitions. [2021-08-21 18:24:39,530 INFO L78 Accepts]: Start accepts. Automaton has 11586 states and 23261 transitions. Word has length 37 [2021-08-21 18:24:39,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:24:39,530 INFO L470 AbstractCegarLoop]: Abstraction has 11586 states and 23261 transitions. [2021-08-21 18:24:39,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:39,531 INFO L276 IsEmpty]: Start isEmpty. Operand 11586 states and 23261 transitions. [2021-08-21 18:24:39,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:24:39,603 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:24:39,603 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:24:39,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-21 18:24:39,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-21 18:24:39,804 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:24:39,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:24:39,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1318902941, now seen corresponding path program 10 times [2021-08-21 18:24:39,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:24:39,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774792229] [2021-08-21 18:24:39,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:24:39,805 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:24:39,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:24:40,286 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:24:40,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:24:40,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774792229] [2021-08-21 18:24:40,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774792229] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:24:40,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394969461] [2021-08-21 18:24:40,286 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:24:40,286 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:24:40,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:24:40,287 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:24:40,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-21 18:24:40,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:24:40,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:24:40,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 18:24:40,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:24:40,992 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:24:40,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-08-21 18:24:41,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-08-21 18:24:41,280 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:24:41,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394969461] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:24:41,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:24:41,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-21 18:24:41,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416058194] [2021-08-21 18:24:41,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 18:24:41,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:24:41,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 18:24:41,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:24:41,281 INFO L87 Difference]: Start difference. First operand 11586 states and 23261 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:42,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:24:42,974 INFO L93 Difference]: Finished difference Result 26674 states and 53744 transitions. [2021-08-21 18:24:42,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 18:24:42,974 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 18:24:42,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:24:43,027 INFO L225 Difference]: With dead ends: 26674 [2021-08-21 18:24:43,027 INFO L226 Difference]: Without dead ends: 26666 [2021-08-21 18:24:43,028 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 1244.3ms TimeCoverageRelationStatistics Valid=413, Invalid=1939, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 18:24:43,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26666 states. [2021-08-21 18:24:43,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26666 to 11797. [2021-08-21 18:24:43,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11797 states, 11796 states have (on average 2.0128857239742284) internal successors, (23744), 11796 states have internal predecessors, (23744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:43,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11797 states to 11797 states and 23744 transitions. [2021-08-21 18:24:43,305 INFO L78 Accepts]: Start accepts. Automaton has 11797 states and 23744 transitions. Word has length 39 [2021-08-21 18:24:43,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:24:43,306 INFO L470 AbstractCegarLoop]: Abstraction has 11797 states and 23744 transitions. [2021-08-21 18:24:43,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:43,306 INFO L276 IsEmpty]: Start isEmpty. Operand 11797 states and 23744 transitions. [2021-08-21 18:24:43,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:24:43,324 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:24:43,325 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:24:43,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-21 18:24:43,541 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,SelfDestructingSolverStorable13 [2021-08-21 18:24:43,542 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:24:43,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:24:43,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1842350753, now seen corresponding path program 11 times [2021-08-21 18:24:43,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:24:43,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828723317] [2021-08-21 18:24:43,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:24:43,542 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:24:43,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:24:43,979 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:24:43,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:24:43,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828723317] [2021-08-21 18:24:43,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828723317] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:24:43,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46673746] [2021-08-21 18:24:43,980 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:24:43,980 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:24:43,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:24:43,985 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:24:44,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-21 18:24:44,218 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:24:44,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:24:44,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-21 18:24:44,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:24:45,137 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:24:45,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 65 [2021-08-21 18:24:45,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:24:45,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 56 [2021-08-21 18:24:45,717 INFO L354 Elim1Store]: treesize reduction 54, result has 11.5 percent of original size [2021-08-21 18:24:45,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 23 [2021-08-21 18:24:45,772 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:24:45,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46673746] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:24:45,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:24:45,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-08-21 18:24:45,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081641695] [2021-08-21 18:24:45,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 18:24:45,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:24:45,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 18:24:45,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:24:45,774 INFO L87 Difference]: Start difference. First operand 11797 states and 23744 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:49,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:24:49,612 INFO L93 Difference]: Finished difference Result 23253 states and 46782 transitions. [2021-08-21 18:24:49,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-21 18:24:49,612 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 18:24:49,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:24:49,651 INFO L225 Difference]: With dead ends: 23253 [2021-08-21 18:24:49,651 INFO L226 Difference]: Without dead ends: 23245 [2021-08-21 18:24:49,652 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1483 ImplicationChecksByTransitivity, 2564.2ms TimeCoverageRelationStatistics Valid=651, Invalid=4605, Unknown=0, NotChecked=0, Total=5256 [2021-08-21 18:24:49,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23245 states. [2021-08-21 18:24:49,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23245 to 11843. [2021-08-21 18:24:49,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11843 states, 11842 states have (on average 2.013426786015876) internal successors, (23843), 11842 states have internal predecessors, (23843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:49,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11843 states to 11843 states and 23843 transitions. [2021-08-21 18:24:49,882 INFO L78 Accepts]: Start accepts. Automaton has 11843 states and 23843 transitions. Word has length 39 [2021-08-21 18:24:49,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:24:49,882 INFO L470 AbstractCegarLoop]: Abstraction has 11843 states and 23843 transitions. [2021-08-21 18:24:49,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:49,882 INFO L276 IsEmpty]: Start isEmpty. Operand 11843 states and 23843 transitions. [2021-08-21 18:24:49,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:24:49,901 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:24:49,901 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:24:49,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-21 18:24:50,116 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,SelfDestructingSolverStorable14 [2021-08-21 18:24:50,117 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:24:50,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:24:50,117 INFO L82 PathProgramCache]: Analyzing trace with hash -275288101, now seen corresponding path program 12 times [2021-08-21 18:24:50,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:24:50,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470279133] [2021-08-21 18:24:50,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:24:50,117 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:24:50,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:24:50,565 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:24:50,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:24:50,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470279133] [2021-08-21 18:24:50,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470279133] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:24:50,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662218468] [2021-08-21 18:24:50,566 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:24:50,566 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:24:50,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:24:50,576 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:24:50,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-21 18:24:50,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:24:50,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:24:50,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:24:50,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:24:51,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-08-21 18:24:51,510 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:24:51,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-08-21 18:24:51,608 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:24:51,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662218468] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:24:51,609 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:24:51,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-21 18:24:51,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626898816] [2021-08-21 18:24:51,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 18:24:51,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:24:51,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 18:24:51,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:24:51,610 INFO L87 Difference]: Start difference. First operand 11843 states and 23843 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:53,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:24:53,238 INFO L93 Difference]: Finished difference Result 29125 states and 59168 transitions. [2021-08-21 18:24:53,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 18:24:53,238 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 18:24:53,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:24:53,286 INFO L225 Difference]: With dead ends: 29125 [2021-08-21 18:24:53,286 INFO L226 Difference]: Without dead ends: 29117 [2021-08-21 18:24:53,287 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 1091.1ms TimeCoverageRelationStatistics Valid=420, Invalid=2030, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 18:24:53,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29117 states. [2021-08-21 18:24:53,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29117 to 12371. [2021-08-21 18:24:53,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12371 states, 12370 states have (on average 2.0202910266774454) internal successors, (24991), 12370 states have internal predecessors, (24991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:53,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12371 states to 12371 states and 24991 transitions. [2021-08-21 18:24:53,553 INFO L78 Accepts]: Start accepts. Automaton has 12371 states and 24991 transitions. Word has length 39 [2021-08-21 18:24:53,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:24:53,553 INFO L470 AbstractCegarLoop]: Abstraction has 12371 states and 24991 transitions. [2021-08-21 18:24:53,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:53,554 INFO L276 IsEmpty]: Start isEmpty. Operand 12371 states and 24991 transitions. [2021-08-21 18:24:53,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:24:53,571 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:24:53,571 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:24:53,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-21 18:24:53,784 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,SelfDestructingSolverStorable15 [2021-08-21 18:24:53,785 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:24:53,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:24:53,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1205817141, now seen corresponding path program 13 times [2021-08-21 18:24:53,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:24:53,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306674744] [2021-08-21 18:24:53,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:24:53,785 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:24:53,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:24:54,277 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:24:54,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:24:54,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306674744] [2021-08-21 18:24:54,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306674744] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:24:54,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091438196] [2021-08-21 18:24:54,278 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:24:54,278 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:24:54,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:24:54,279 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:24:54,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-21 18:24:54,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:24:54,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 18:24:54,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:24:54,950 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:24:54,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-08-21 18:24:55,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-21 18:24:55,309 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:24:55,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091438196] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:24:55,309 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:24:55,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-21 18:24:55,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749084074] [2021-08-21 18:24:55,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 18:24:55,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:24:55,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 18:24:55,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:24:55,310 INFO L87 Difference]: Start difference. First operand 12371 states and 24991 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:56,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:24:56,719 INFO L93 Difference]: Finished difference Result 24002 states and 48249 transitions. [2021-08-21 18:24:56,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 18:24:56,719 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 18:24:56,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:24:56,757 INFO L225 Difference]: With dead ends: 24002 [2021-08-21 18:24:56,757 INFO L226 Difference]: Without dead ends: 23990 [2021-08-21 18:24:56,758 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1158.4ms TimeCoverageRelationStatistics Valid=358, Invalid=1804, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 18:24:56,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23990 states. [2021-08-21 18:24:56,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23990 to 12411. [2021-08-21 18:24:56,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12411 states, 12410 states have (on average 2.0203867848509267) internal successors, (25073), 12410 states have internal predecessors, (25073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:56,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12411 states to 12411 states and 25073 transitions. [2021-08-21 18:24:56,991 INFO L78 Accepts]: Start accepts. Automaton has 12411 states and 25073 transitions. Word has length 39 [2021-08-21 18:24:56,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:24:56,992 INFO L470 AbstractCegarLoop]: Abstraction has 12411 states and 25073 transitions. [2021-08-21 18:24:56,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:24:56,992 INFO L276 IsEmpty]: Start isEmpty. Operand 12411 states and 25073 transitions. [2021-08-21 18:24:57,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:24:57,008 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:24:57,008 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:24:57,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-21 18:24:57,208 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,SelfDestructingSolverStorable16 [2021-08-21 18:24:57,208 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:24:57,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:24:57,209 INFO L82 PathProgramCache]: Analyzing trace with hash 844616901, now seen corresponding path program 14 times [2021-08-21 18:24:57,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:24:57,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753659084] [2021-08-21 18:24:57,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:24:57,209 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:24:57,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:24:57,658 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:24:57,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:24:57,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753659084] [2021-08-21 18:24:57,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753659084] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:24:57,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307142386] [2021-08-21 18:24:57,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:24:57,659 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:24:57,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:24:57,660 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:24:57,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-21 18:24:58,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:24:58,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:24:58,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 18:24:58,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:24:58,446 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:24:58,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-08-21 18:24:58,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-08-21 18:24:58,742 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:24:58,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307142386] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:24:58,742 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:24:58,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-21 18:24:58,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032090751] [2021-08-21 18:24:58,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 18:24:58,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:24:58,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 18:24:58,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:24:58,743 INFO L87 Difference]: Start difference. First operand 12411 states and 25073 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:00,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:25:00,187 INFO L93 Difference]: Finished difference Result 25849 states and 52249 transitions. [2021-08-21 18:25:00,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 18:25:00,187 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 18:25:00,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:25:00,227 INFO L225 Difference]: With dead ends: 25849 [2021-08-21 18:25:00,227 INFO L226 Difference]: Without dead ends: 25841 [2021-08-21 18:25:00,228 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 986.9ms TimeCoverageRelationStatistics Valid=334, Invalid=1828, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 18:25:00,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25841 states. [2021-08-21 18:25:00,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25841 to 12424. [2021-08-21 18:25:00,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12424 states, 12423 states have (on average 2.0202044594703374) internal successors, (25097), 12423 states have internal predecessors, (25097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:00,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12424 states to 12424 states and 25097 transitions. [2021-08-21 18:25:00,475 INFO L78 Accepts]: Start accepts. Automaton has 12424 states and 25097 transitions. Word has length 39 [2021-08-21 18:25:00,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:25:00,475 INFO L470 AbstractCegarLoop]: Abstraction has 12424 states and 25097 transitions. [2021-08-21 18:25:00,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:00,475 INFO L276 IsEmpty]: Start isEmpty. Operand 12424 states and 25097 transitions. [2021-08-21 18:25:00,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:25:00,493 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:25:00,493 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:25:00,516 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-08-21 18:25:00,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:25:00,697 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:25:00,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:25:00,697 INFO L82 PathProgramCache]: Analyzing trace with hash -2096665671, now seen corresponding path program 15 times [2021-08-21 18:25:00,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:25:00,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372551697] [2021-08-21 18:25:00,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:25:00,697 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:25:00,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:25:01,171 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:25:01,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:25:01,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372551697] [2021-08-21 18:25:01,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372551697] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:25:01,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436067184] [2021-08-21 18:25:01,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:25:01,172 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:25:01,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:25:01,173 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:25:01,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-21 18:25:01,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:25:01,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:25:01,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-21 18:25:01,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:25:02,281 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-21 18:25:02,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 21 [2021-08-21 18:25:02,477 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:25:02,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-08-21 18:25:02,737 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:25:02,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436067184] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:25:02,737 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:25:02,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-08-21 18:25:02,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296887987] [2021-08-21 18:25:02,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 18:25:02,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:25:02,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 18:25:02,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=703, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:25:02,738 INFO L87 Difference]: Start difference. First operand 12424 states and 25097 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:04,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:25:04,410 INFO L93 Difference]: Finished difference Result 23622 states and 47490 transitions. [2021-08-21 18:25:04,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 18:25:04,410 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 18:25:04,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:25:04,452 INFO L225 Difference]: With dead ends: 23622 [2021-08-21 18:25:04,452 INFO L226 Difference]: Without dead ends: 23610 [2021-08-21 18:25:04,453 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1247.8ms TimeCoverageRelationStatistics Valid=457, Invalid=1799, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 18:25:04,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23610 states. [2021-08-21 18:25:04,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23610 to 12454. [2021-08-21 18:25:04,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12454 states, 12453 states have (on average 2.019914879948607) internal successors, (25154), 12453 states have internal predecessors, (25154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:04,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12454 states to 12454 states and 25154 transitions. [2021-08-21 18:25:04,703 INFO L78 Accepts]: Start accepts. Automaton has 12454 states and 25154 transitions. Word has length 39 [2021-08-21 18:25:04,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:25:04,703 INFO L470 AbstractCegarLoop]: Abstraction has 12454 states and 25154 transitions. [2021-08-21 18:25:04,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:04,704 INFO L276 IsEmpty]: Start isEmpty. Operand 12454 states and 25154 transitions. [2021-08-21 18:25:04,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:25:04,756 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:25:04,756 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:25:04,776 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 18:25:04,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:25:04,965 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:25:04,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:25:04,965 INFO L82 PathProgramCache]: Analyzing trace with hash 946400103, now seen corresponding path program 16 times [2021-08-21 18:25:04,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:25:04,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547693450] [2021-08-21 18:25:04,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:25:04,965 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:25:04,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:25:05,518 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:25:05,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:25:05,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547693450] [2021-08-21 18:25:05,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547693450] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:25:05,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655135584] [2021-08-21 18:25:05,518 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:25:05,518 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:25:05,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:25:05,519 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:25:05,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-21 18:25:06,105 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:25:06,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:25:06,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 18:25:06,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:25:06,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-08-21 18:25:06,807 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:25:06,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-08-21 18:25:07,075 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:25:07,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655135584] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:25:07,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:25:07,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-21 18:25:07,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59603711] [2021-08-21 18:25:07,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 18:25:07,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:25:07,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 18:25:07,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:25:07,077 INFO L87 Difference]: Start difference. First operand 12454 states and 25154 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:08,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:25:08,599 INFO L93 Difference]: Finished difference Result 26471 states and 53551 transitions. [2021-08-21 18:25:08,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 18:25:08,600 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 18:25:08,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:25:08,646 INFO L225 Difference]: With dead ends: 26471 [2021-08-21 18:25:08,646 INFO L226 Difference]: Without dead ends: 26463 [2021-08-21 18:25:08,646 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 1128.3ms TimeCoverageRelationStatistics Valid=362, Invalid=1708, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 18:25:08,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26463 states. [2021-08-21 18:25:08,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26463 to 12519. [2021-08-21 18:25:08,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12519 states, 12518 states have (on average 2.0207700910688606) internal successors, (25296), 12518 states have internal predecessors, (25296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:08,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12519 states to 12519 states and 25296 transitions. [2021-08-21 18:25:08,913 INFO L78 Accepts]: Start accepts. Automaton has 12519 states and 25296 transitions. Word has length 39 [2021-08-21 18:25:08,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:25:08,913 INFO L470 AbstractCegarLoop]: Abstraction has 12519 states and 25296 transitions. [2021-08-21 18:25:08,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:08,913 INFO L276 IsEmpty]: Start isEmpty. Operand 12519 states and 25296 transitions. [2021-08-21 18:25:08,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:25:08,932 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:25:08,932 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:25:08,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-21 18:25:09,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:25:09,150 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:25:09,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:25:09,150 INFO L82 PathProgramCache]: Analyzing trace with hash 267259837, now seen corresponding path program 17 times [2021-08-21 18:25:09,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:25:09,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771014916] [2021-08-21 18:25:09,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:25:09,151 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:25:09,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:25:09,590 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:25:09,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:25:09,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771014916] [2021-08-21 18:25:09,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771014916] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:25:09,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164148083] [2021-08-21 18:25:09,590 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:25:09,590 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:25:09,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:25:09,591 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:25:09,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-21 18:25:10,221 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:25:10,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:25:10,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-21 18:25:10,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:25:10,961 INFO L354 Elim1Store]: treesize reduction 36, result has 46.3 percent of original size [2021-08-21 18:25:10,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 67 [2021-08-21 18:25:11,374 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 18:25:11,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 36 [2021-08-21 18:25:11,479 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:25:11,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164148083] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:25:11,479 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:25:11,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-08-21 18:25:11,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744067066] [2021-08-21 18:25:11,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 18:25:11,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:25:11,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 18:25:11,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:25:11,480 INFO L87 Difference]: Start difference. First operand 12519 states and 25296 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:13,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:25:13,799 INFO L93 Difference]: Finished difference Result 23791 states and 47804 transitions. [2021-08-21 18:25:13,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 18:25:13,799 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 18:25:13,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:25:13,838 INFO L225 Difference]: With dead ends: 23791 [2021-08-21 18:25:13,838 INFO L226 Difference]: Without dead ends: 23779 [2021-08-21 18:25:13,839 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 1583.3ms TimeCoverageRelationStatistics Valid=420, Invalid=2336, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 18:25:13,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23779 states. [2021-08-21 18:25:14,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23779 to 12565. [2021-08-21 18:25:14,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12565 states, 12564 states have (on average 2.021808341292582) internal successors, (25402), 12564 states have internal predecessors, (25402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:14,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12565 states to 12565 states and 25402 transitions. [2021-08-21 18:25:14,078 INFO L78 Accepts]: Start accepts. Automaton has 12565 states and 25402 transitions. Word has length 39 [2021-08-21 18:25:14,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:25:14,078 INFO L470 AbstractCegarLoop]: Abstraction has 12565 states and 25402 transitions. [2021-08-21 18:25:14,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:14,079 INFO L276 IsEmpty]: Start isEmpty. Operand 12565 states and 25402 transitions. [2021-08-21 18:25:14,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:25:14,095 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:25:14,095 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:25:14,114 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-08-21 18:25:14,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:25:14,296 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:25:14,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:25:14,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1663950503, now seen corresponding path program 18 times [2021-08-21 18:25:14,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:25:14,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456420605] [2021-08-21 18:25:14,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:25:14,296 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:25:14,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:25:14,768 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:25:14,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:25:14,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456420605] [2021-08-21 18:25:14,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456420605] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:25:14,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426566296] [2021-08-21 18:25:14,769 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:25:14,769 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:25:14,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:25:14,770 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:25:14,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-21 18:25:15,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 18:25:15,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:25:15,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-21 18:25:15,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:25:16,011 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:25:16,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 52 [2021-08-21 18:25:16,205 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:25:16,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 38 [2021-08-21 18:25:16,508 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:25:16,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 34 [2021-08-21 18:25:16,716 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:25:16,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426566296] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:25:16,717 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:25:16,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2021-08-21 18:25:16,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396882827] [2021-08-21 18:25:16,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 18:25:16,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:25:16,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 18:25:16,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=929, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 18:25:16,718 INFO L87 Difference]: Start difference. First operand 12565 states and 25402 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:22,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:25:22,522 INFO L93 Difference]: Finished difference Result 24156 states and 48786 transitions. [2021-08-21 18:25:22,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-08-21 18:25:22,522 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 18:25:22,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:25:22,563 INFO L225 Difference]: With dead ends: 24156 [2021-08-21 18:25:22,563 INFO L226 Difference]: Without dead ends: 24140 [2021-08-21 18:25:22,565 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3448 ImplicationChecksByTransitivity, 4445.7ms TimeCoverageRelationStatistics Valid=1156, Invalid=9556, Unknown=0, NotChecked=0, Total=10712 [2021-08-21 18:25:22,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24140 states. [2021-08-21 18:25:22,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24140 to 12589. [2021-08-21 18:25:22,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12589 states, 12588 states have (on average 2.0226406101048617) internal successors, (25461), 12588 states have internal predecessors, (25461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:22,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12589 states to 12589 states and 25461 transitions. [2021-08-21 18:25:22,793 INFO L78 Accepts]: Start accepts. Automaton has 12589 states and 25461 transitions. Word has length 39 [2021-08-21 18:25:22,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:25:22,794 INFO L470 AbstractCegarLoop]: Abstraction has 12589 states and 25461 transitions. [2021-08-21 18:25:22,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:22,794 INFO L276 IsEmpty]: Start isEmpty. Operand 12589 states and 25461 transitions. [2021-08-21 18:25:22,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:25:22,811 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:25:22,811 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:25:22,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-21 18:25:23,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:25:23,026 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:25:23,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:25:23,026 INFO L82 PathProgramCache]: Analyzing trace with hash 2107568981, now seen corresponding path program 19 times [2021-08-21 18:25:23,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:25:23,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265174175] [2021-08-21 18:25:23,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:25:23,026 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:25:23,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:25:23,572 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:25:23,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:25:23,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265174175] [2021-08-21 18:25:23,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265174175] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:25:23,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102331430] [2021-08-21 18:25:23,572 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:25:23,572 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:25:23,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:25:23,573 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:25:23,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-21 18:25:24,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:25:24,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 18:25:24,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:25:24,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-08-21 18:25:24,985 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:25:24,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-08-21 18:25:25,083 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:25:25,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102331430] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:25:25,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:25:25,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-21 18:25:25,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474847560] [2021-08-21 18:25:25,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 18:25:25,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:25:25,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 18:25:25,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:25:25,084 INFO L87 Difference]: Start difference. First operand 12589 states and 25461 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:26,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:25:26,632 INFO L93 Difference]: Finished difference Result 29288 states and 59463 transitions. [2021-08-21 18:25:26,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 18:25:26,632 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 18:25:26,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:25:26,699 INFO L225 Difference]: With dead ends: 29288 [2021-08-21 18:25:26,699 INFO L226 Difference]: Without dead ends: 29280 [2021-08-21 18:25:26,700 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 1057.3ms TimeCoverageRelationStatistics Valid=375, Invalid=1977, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 18:25:26,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29280 states. [2021-08-21 18:25:26,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29280 to 12648. [2021-08-21 18:25:26,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12648 states, 12647 states have (on average 2.0234047600221396) internal successors, (25590), 12647 states have internal predecessors, (25590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:26,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12648 states to 12648 states and 25590 transitions. [2021-08-21 18:25:26,999 INFO L78 Accepts]: Start accepts. Automaton has 12648 states and 25590 transitions. Word has length 39 [2021-08-21 18:25:27,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:25:27,000 INFO L470 AbstractCegarLoop]: Abstraction has 12648 states and 25590 transitions. [2021-08-21 18:25:27,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:27,000 INFO L276 IsEmpty]: Start isEmpty. Operand 12648 states and 25590 transitions. [2021-08-21 18:25:27,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:25:27,018 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:25:27,018 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:25:27,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-21 18:25:27,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:25:27,229 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:25:27,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:25:27,229 INFO L82 PathProgramCache]: Analyzing trace with hash -620335663, now seen corresponding path program 20 times [2021-08-21 18:25:27,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:25:27,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976854245] [2021-08-21 18:25:27,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:25:27,229 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:25:27,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:25:27,694 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:25:27,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:25:27,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976854245] [2021-08-21 18:25:27,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976854245] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:25:27,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241449634] [2021-08-21 18:25:27,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:25:27,694 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:25:27,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:25:27,695 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:25:27,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-21 18:25:28,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:25:28,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:25:28,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 18:25:28,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:25:28,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-08-21 18:25:29,100 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:25:29,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-08-21 18:25:29,198 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:25:29,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241449634] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:25:29,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:25:29,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-21 18:25:29,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219967840] [2021-08-21 18:25:29,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 18:25:29,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:25:29,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 18:25:29,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:25:29,199 INFO L87 Difference]: Start difference. First operand 12648 states and 25590 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:31,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:25:31,017 INFO L93 Difference]: Finished difference Result 31471 states and 64070 transitions. [2021-08-21 18:25:31,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 18:25:31,017 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 18:25:31,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:25:31,086 INFO L225 Difference]: With dead ends: 31471 [2021-08-21 18:25:31,086 INFO L226 Difference]: Without dead ends: 31463 [2021-08-21 18:25:31,087 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 1152.7ms TimeCoverageRelationStatistics Valid=396, Invalid=2154, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 18:25:31,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31463 states. [2021-08-21 18:25:31,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31463 to 12588. [2021-08-21 18:25:31,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12588 states, 12587 states have (on average 2.023357432271391) internal successors, (25468), 12587 states have internal predecessors, (25468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:31,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12588 states to 12588 states and 25468 transitions. [2021-08-21 18:25:31,390 INFO L78 Accepts]: Start accepts. Automaton has 12588 states and 25468 transitions. Word has length 39 [2021-08-21 18:25:31,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:25:31,390 INFO L470 AbstractCegarLoop]: Abstraction has 12588 states and 25468 transitions. [2021-08-21 18:25:31,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:31,391 INFO L276 IsEmpty]: Start isEmpty. Operand 12588 states and 25468 transitions. [2021-08-21 18:25:31,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:25:31,408 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:25:31,408 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:25:31,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-21 18:25:31,608 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,SelfDestructingSolverStorable23 [2021-08-21 18:25:31,609 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:25:31,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:25:31,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1177081095, now seen corresponding path program 21 times [2021-08-21 18:25:31,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:25:31,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386730734] [2021-08-21 18:25:31,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:25:31,609 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:25:31,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:25:32,069 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:25:32,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:25:32,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386730734] [2021-08-21 18:25:32,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386730734] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:25:32,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25084097] [2021-08-21 18:25:32,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:25:32,070 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:25:32,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:25:32,073 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:25:32,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-21 18:25:32,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:25:32,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:25:32,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-21 18:25:32,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:25:33,400 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-21 18:25:33,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-08-21 18:25:33,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-08-21 18:25:33,543 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:25:33,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2021-08-21 18:25:33,641 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:25:33,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25084097] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:25:33,642 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:25:33,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-08-21 18:25:33,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119480710] [2021-08-21 18:25:33,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 18:25:33,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:25:33,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 18:25:33,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2021-08-21 18:25:33,643 INFO L87 Difference]: Start difference. First operand 12588 states and 25468 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:36,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:25:36,871 INFO L93 Difference]: Finished difference Result 28481 states and 57700 transitions. [2021-08-21 18:25:36,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-08-21 18:25:36,872 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 18:25:36,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:25:36,932 INFO L225 Difference]: With dead ends: 28481 [2021-08-21 18:25:36,932 INFO L226 Difference]: Without dead ends: 28473 [2021-08-21 18:25:36,933 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1718 ImplicationChecksByTransitivity, 2245.9ms TimeCoverageRelationStatistics Valid=711, Invalid=4989, Unknown=0, NotChecked=0, Total=5700 [2021-08-21 18:25:36,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28473 states. [2021-08-21 18:25:37,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28473 to 12588. [2021-08-21 18:25:37,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12588 states, 12587 states have (on average 2.023277985222849) internal successors, (25467), 12587 states have internal predecessors, (25467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:37,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12588 states to 12588 states and 25467 transitions. [2021-08-21 18:25:37,208 INFO L78 Accepts]: Start accepts. Automaton has 12588 states and 25467 transitions. Word has length 39 [2021-08-21 18:25:37,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:25:37,208 INFO L470 AbstractCegarLoop]: Abstraction has 12588 states and 25467 transitions. [2021-08-21 18:25:37,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:37,208 INFO L276 IsEmpty]: Start isEmpty. Operand 12588 states and 25467 transitions. [2021-08-21 18:25:37,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:25:37,225 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:25:37,225 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:25:37,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-21 18:25:37,431 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,SelfDestructingSolverStorable24 [2021-08-21 18:25:37,431 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:25:37,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:25:37,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1481910279, now seen corresponding path program 22 times [2021-08-21 18:25:37,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:25:37,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654417356] [2021-08-21 18:25:37,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:25:37,432 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:25:37,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:25:37,914 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:25:37,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:25:37,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654417356] [2021-08-21 18:25:37,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654417356] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:25:37,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473999189] [2021-08-21 18:25:37,914 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:25:37,914 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:25:37,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:25:37,915 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:25:37,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-21 18:25:38,846 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:25:38,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:25:38,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 18:25:38,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:25:39,373 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:25:39,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-08-21 18:25:39,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-08-21 18:25:39,582 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:25:39,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473999189] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:25:39,582 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:25:39,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-21 18:25:39,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604268725] [2021-08-21 18:25:39,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 18:25:39,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:25:39,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 18:25:39,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:25:39,583 INFO L87 Difference]: Start difference. First operand 12588 states and 25467 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:41,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:25:41,898 INFO L93 Difference]: Finished difference Result 27114 states and 54793 transitions. [2021-08-21 18:25:41,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-21 18:25:41,899 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 18:25:41,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:25:41,948 INFO L225 Difference]: With dead ends: 27114 [2021-08-21 18:25:41,948 INFO L226 Difference]: Without dead ends: 27091 [2021-08-21 18:25:41,949 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 982 ImplicationChecksByTransitivity, 1493.3ms TimeCoverageRelationStatistics Valid=479, Invalid=2943, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 18:25:41,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27091 states. [2021-08-21 18:25:42,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27091 to 12631. [2021-08-21 18:25:42,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12631 states, 12630 states have (on average 2.0249406175771973) internal successors, (25575), 12630 states have internal predecessors, (25575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:42,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12631 states to 12631 states and 25575 transitions. [2021-08-21 18:25:42,261 INFO L78 Accepts]: Start accepts. Automaton has 12631 states and 25575 transitions. Word has length 39 [2021-08-21 18:25:42,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:25:42,262 INFO L470 AbstractCegarLoop]: Abstraction has 12631 states and 25575 transitions. [2021-08-21 18:25:42,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:42,262 INFO L276 IsEmpty]: Start isEmpty. Operand 12631 states and 25575 transitions. [2021-08-21 18:25:42,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:25:42,277 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:25:42,277 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:25:42,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-21 18:25:42,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-21 18:25:42,481 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:25:42,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:25:42,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1326780683, now seen corresponding path program 23 times [2021-08-21 18:25:42,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:25:42,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984492780] [2021-08-21 18:25:42,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:25:42,482 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:25:42,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:25:42,978 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:25:42,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:25:42,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984492780] [2021-08-21 18:25:42,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984492780] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:25:42,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808736176] [2021-08-21 18:25:42,979 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:25:42,979 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:25:42,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:25:42,980 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:25:42,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-21 18:25:43,939 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:25:43,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:25:43,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-21 18:25:43,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:25:44,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2021-08-21 18:25:44,828 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-21 18:25:44,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 38 [2021-08-21 18:25:44,935 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:25:44,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808736176] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:25:44,935 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:25:44,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-21 18:25:44,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760272124] [2021-08-21 18:25:44,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 18:25:44,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:25:44,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 18:25:44,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:25:44,937 INFO L87 Difference]: Start difference. First operand 12631 states and 25575 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:47,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:25:47,232 INFO L93 Difference]: Finished difference Result 29862 states and 60835 transitions. [2021-08-21 18:25:47,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 18:25:47,232 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 18:25:47,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:25:47,280 INFO L225 Difference]: With dead ends: 29862 [2021-08-21 18:25:47,281 INFO L226 Difference]: Without dead ends: 29854 [2021-08-21 18:25:47,281 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 1655.7ms TimeCoverageRelationStatistics Valid=474, Invalid=2948, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 18:25:47,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29854 states. [2021-08-21 18:25:47,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29854 to 12706. [2021-08-21 18:25:47,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12706 states, 12705 states have (on average 2.0267611176702087) internal successors, (25750), 12705 states have internal predecessors, (25750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:47,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12706 states to 12706 states and 25750 transitions. [2021-08-21 18:25:47,531 INFO L78 Accepts]: Start accepts. Automaton has 12706 states and 25750 transitions. Word has length 39 [2021-08-21 18:25:47,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:25:47,531 INFO L470 AbstractCegarLoop]: Abstraction has 12706 states and 25750 transitions. [2021-08-21 18:25:47,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:47,531 INFO L276 IsEmpty]: Start isEmpty. Operand 12706 states and 25750 transitions. [2021-08-21 18:25:47,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:25:47,548 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:25:47,548 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:25:47,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-21 18:25:47,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:25:47,749 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:25:47,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:25:47,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1749541773, now seen corresponding path program 24 times [2021-08-21 18:25:47,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:25:47,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111619088] [2021-08-21 18:25:47,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:25:47,751 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:25:47,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:25:48,243 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:25:48,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:25:48,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111619088] [2021-08-21 18:25:48,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111619088] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:25:48,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617181779] [2021-08-21 18:25:48,244 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:25:48,244 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:25:48,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:25:48,244 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:25:48,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-21 18:25:49,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 18:25:49,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:25:49,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-21 18:25:49,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:25:49,907 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:25:49,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 65 [2021-08-21 18:25:51,176 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-21 18:25:51,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 74 [2021-08-21 18:25:51,940 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:25:51,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2021-08-21 18:25:52,109 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:25:52,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617181779] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:25:52,110 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:25:52,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2021-08-21 18:25:52,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692908764] [2021-08-21 18:25:52,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 18:25:52,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:25:52,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 18:25:52,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 18:25:52,110 INFO L87 Difference]: Start difference. First operand 12706 states and 25750 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:58,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:25:58,240 INFO L93 Difference]: Finished difference Result 29945 states and 61085 transitions. [2021-08-21 18:25:58,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-08-21 18:25:58,241 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 18:25:58,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:25:58,319 INFO L225 Difference]: With dead ends: 29945 [2021-08-21 18:25:58,319 INFO L226 Difference]: Without dead ends: 29937 [2021-08-21 18:25:58,320 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2682 ImplicationChecksByTransitivity, 4329.4ms TimeCoverageRelationStatistics Valid=1105, Invalid=7825, Unknown=0, NotChecked=0, Total=8930 [2021-08-21 18:25:58,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29937 states. [2021-08-21 18:25:58,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29937 to 12742. [2021-08-21 18:25:58,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12742 states, 12741 states have (on average 2.027705831567381) internal successors, (25835), 12741 states have internal predecessors, (25835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:58,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12742 states to 12742 states and 25835 transitions. [2021-08-21 18:25:58,567 INFO L78 Accepts]: Start accepts. Automaton has 12742 states and 25835 transitions. Word has length 39 [2021-08-21 18:25:58,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:25:58,568 INFO L470 AbstractCegarLoop]: Abstraction has 12742 states and 25835 transitions. [2021-08-21 18:25:58,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:25:58,568 INFO L276 IsEmpty]: Start isEmpty. Operand 12742 states and 25835 transitions. [2021-08-21 18:25:58,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:25:58,587 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:25:58,587 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:25:58,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-21 18:25:58,787 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,SelfDestructingSolverStorable27 [2021-08-21 18:25:58,787 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:25:58,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:25:58,788 INFO L82 PathProgramCache]: Analyzing trace with hash -889174777, now seen corresponding path program 25 times [2021-08-21 18:25:58,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:25:58,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408843101] [2021-08-21 18:25:58,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:25:58,788 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:25:58,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:25:59,302 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:25:59,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:25:59,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408843101] [2021-08-21 18:25:59,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408843101] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:25:59,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693552182] [2021-08-21 18:25:59,302 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:25:59,302 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:25:59,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:25:59,303 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:25:59,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-21 18:26:00,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:26:00,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 18:26:00,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:26:00,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-08-21 18:26:01,028 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:26:01,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-08-21 18:26:01,132 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:26:01,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693552182] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:26:01,133 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:26:01,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-21 18:26:01,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234869399] [2021-08-21 18:26:01,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 18:26:01,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:26:01,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 18:26:01,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:26:01,134 INFO L87 Difference]: Start difference. First operand 12742 states and 25835 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:26:03,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:26:03,584 INFO L93 Difference]: Finished difference Result 28637 states and 58317 transitions. [2021-08-21 18:26:03,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-21 18:26:03,584 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 18:26:03,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:26:03,629 INFO L225 Difference]: With dead ends: 28637 [2021-08-21 18:26:03,630 INFO L226 Difference]: Without dead ends: 28629 [2021-08-21 18:26:03,630 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 1797.1ms TimeCoverageRelationStatistics Valid=599, Invalid=3691, Unknown=0, NotChecked=0, Total=4290 [2021-08-21 18:26:03,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28629 states. [2021-08-21 18:26:03,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28629 to 12764. [2021-08-21 18:26:03,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12764 states, 12763 states have (on average 2.0276580741205046) internal successors, (25879), 12763 states have internal predecessors, (25879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:26:03,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12764 states to 12764 states and 25879 transitions. [2021-08-21 18:26:03,863 INFO L78 Accepts]: Start accepts. Automaton has 12764 states and 25879 transitions. Word has length 39 [2021-08-21 18:26:03,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:26:03,863 INFO L470 AbstractCegarLoop]: Abstraction has 12764 states and 25879 transitions. [2021-08-21 18:26:03,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:26:03,863 INFO L276 IsEmpty]: Start isEmpty. Operand 12764 states and 25879 transitions. [2021-08-21 18:26:03,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:26:03,878 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:26:03,878 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:26:03,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-21 18:26:04,079 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,SelfDestructingSolverStorable28 [2021-08-21 18:26:04,079 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:26:04,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:26:04,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1740501253, now seen corresponding path program 26 times [2021-08-21 18:26:04,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:26:04,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83964210] [2021-08-21 18:26:04,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:26:04,079 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:26:04,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:26:04,584 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:26:04,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:26:04,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83964210] [2021-08-21 18:26:04,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83964210] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:26:04,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268909852] [2021-08-21 18:26:04,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:26:04,585 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:26:04,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:26:04,587 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:26:04,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-21 18:26:05,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:26:05,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:26:05,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 18:26:05,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:26:06,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-08-21 18:26:06,386 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:26:06,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-08-21 18:26:06,481 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:26:06,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268909852] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:26:06,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:26:06,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-21 18:26:06,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313308964] [2021-08-21 18:26:06,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 18:26:06,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:26:06,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 18:26:06,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:26:06,482 INFO L87 Difference]: Start difference. First operand 12764 states and 25879 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:26:08,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:26:08,912 INFO L93 Difference]: Finished difference Result 28292 states and 57429 transitions. [2021-08-21 18:26:08,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-21 18:26:08,912 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 18:26:08,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:26:08,957 INFO L225 Difference]: With dead ends: 28292 [2021-08-21 18:26:08,957 INFO L226 Difference]: Without dead ends: 28260 [2021-08-21 18:26:08,958 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1209 ImplicationChecksByTransitivity, 1703.4ms TimeCoverageRelationStatistics Valid=632, Invalid=3400, Unknown=0, NotChecked=0, Total=4032 [2021-08-21 18:26:08,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28260 states. [2021-08-21 18:26:09,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28260 to 12772. [2021-08-21 18:26:09,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12772 states, 12771 states have (on average 2.028502075013703) internal successors, (25906), 12771 states have internal predecessors, (25906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:26:09,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12772 states to 12772 states and 25906 transitions. [2021-08-21 18:26:09,190 INFO L78 Accepts]: Start accepts. Automaton has 12772 states and 25906 transitions. Word has length 39 [2021-08-21 18:26:09,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:26:09,190 INFO L470 AbstractCegarLoop]: Abstraction has 12772 states and 25906 transitions. [2021-08-21 18:26:09,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:26:09,190 INFO L276 IsEmpty]: Start isEmpty. Operand 12772 states and 25906 transitions. [2021-08-21 18:26:09,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:26:09,206 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:26:09,206 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:26:09,226 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 18:26:09,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:26:09,421 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:26:09,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:26:09,421 INFO L82 PathProgramCache]: Analyzing trace with hash 648601019, now seen corresponding path program 27 times [2021-08-21 18:26:09,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:26:09,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224316746] [2021-08-21 18:26:09,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:26:09,421 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:26:09,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:26:09,939 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:26:09,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:26:09,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224316746] [2021-08-21 18:26:09,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224316746] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:26:09,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770626502] [2021-08-21 18:26:09,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:26:09,939 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:26:09,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:26:09,940 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:26:09,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-21 18:26:11,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:26:11,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:26:11,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 18:26:11,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:26:11,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-08-21 18:26:11,660 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:26:11,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-08-21 18:26:11,727 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:26:11,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2021-08-21 18:26:11,838 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:26:11,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770626502] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:26:11,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:26:11,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-08-21 18:26:11,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825288034] [2021-08-21 18:26:11,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 18:26:11,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:26:11,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 18:26:11,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2021-08-21 18:26:11,839 INFO L87 Difference]: Start difference. First operand 12772 states and 25906 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:26:14,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:26:14,583 INFO L93 Difference]: Finished difference Result 26870 states and 54297 transitions. [2021-08-21 18:26:14,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-21 18:26:14,584 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 18:26:14,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:26:14,628 INFO L225 Difference]: With dead ends: 26870 [2021-08-21 18:26:14,628 INFO L226 Difference]: Without dead ends: 26862 [2021-08-21 18:26:14,629 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 2139.6ms TimeCoverageRelationStatistics Valid=666, Invalid=4164, Unknown=0, NotChecked=0, Total=4830 [2021-08-21 18:26:14,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26862 states. [2021-08-21 18:26:14,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26862 to 12791. [2021-08-21 18:26:14,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12791 states, 12790 states have (on average 2.0279906176700546) internal successors, (25938), 12790 states have internal predecessors, (25938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:26:14,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12791 states to 12791 states and 25938 transitions. [2021-08-21 18:26:14,859 INFO L78 Accepts]: Start accepts. Automaton has 12791 states and 25938 transitions. Word has length 39 [2021-08-21 18:26:14,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:26:14,859 INFO L470 AbstractCegarLoop]: Abstraction has 12791 states and 25938 transitions. [2021-08-21 18:26:14,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:26:14,859 INFO L276 IsEmpty]: Start isEmpty. Operand 12791 states and 25938 transitions. [2021-08-21 18:26:14,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:26:14,875 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:26:14,875 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:26:14,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-21 18:26:15,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:26:15,081 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:26:15,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:26:15,081 INFO L82 PathProgramCache]: Analyzing trace with hash 614383735, now seen corresponding path program 28 times [2021-08-21 18:26:15,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:26:15,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093270441] [2021-08-21 18:26:15,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:26:15,081 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:26:15,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:26:15,579 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:26:15,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:26:15,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093270441] [2021-08-21 18:26:15,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093270441] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:26:15,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477005517] [2021-08-21 18:26:15,579 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:26:15,580 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:26:15,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:26:15,581 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:26:15,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-21 18:26:16,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:26:16,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:26:16,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 18:26:16,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:26:17,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-08-21 18:26:17,466 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:26:17,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-08-21 18:26:17,559 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:26:17,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477005517] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:26:17,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:26:17,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-21 18:26:17,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857912617] [2021-08-21 18:26:17,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 18:26:17,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:26:17,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 18:26:17,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:26:17,560 INFO L87 Difference]: Start difference. First operand 12791 states and 25938 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:26:20,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:26:20,474 INFO L93 Difference]: Finished difference Result 27379 states and 55731 transitions. [2021-08-21 18:26:20,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-21 18:26:20,474 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 18:26:20,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:26:20,515 INFO L225 Difference]: With dead ends: 27379 [2021-08-21 18:26:20,515 INFO L226 Difference]: Without dead ends: 27371 [2021-08-21 18:26:20,516 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1180 ImplicationChecksByTransitivity, 2102.8ms TimeCoverageRelationStatistics Valid=588, Invalid=3702, Unknown=0, NotChecked=0, Total=4290 [2021-08-21 18:26:20,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27371 states. [2021-08-21 18:26:20,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27371 to 12831. [2021-08-21 18:26:20,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12831 states, 12830 states have (on average 2.0282930631332814) internal successors, (26023), 12830 states have internal predecessors, (26023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:26:20,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12831 states to 12831 states and 26023 transitions. [2021-08-21 18:26:20,748 INFO L78 Accepts]: Start accepts. Automaton has 12831 states and 26023 transitions. Word has length 39 [2021-08-21 18:26:20,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:26:20,748 INFO L470 AbstractCegarLoop]: Abstraction has 12831 states and 26023 transitions. [2021-08-21 18:26:20,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:26:20,748 INFO L276 IsEmpty]: Start isEmpty. Operand 12831 states and 26023 transitions. [2021-08-21 18:26:20,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:26:20,764 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:26:20,764 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:26:20,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-21 18:26:20,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:26:20,969 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:26:20,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:26:20,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1247277431, now seen corresponding path program 29 times [2021-08-21 18:26:20,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:26:20,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180570539] [2021-08-21 18:26:20,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:26:20,969 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:26:20,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:26:21,469 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:26:21,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:26:21,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180570539] [2021-08-21 18:26:21,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180570539] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:26:21,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718421761] [2021-08-21 18:26:21,470 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:26:21,470 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:26:21,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:26:21,471 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:26:21,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-21 18:26:22,830 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:26:22,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:26:22,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 18:26:22,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:26:23,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-08-21 18:26:23,436 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:26:23,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 65 [2021-08-21 18:26:23,585 INFO L354 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2021-08-21 18:26:23,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 17 [2021-08-21 18:26:23,642 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:26:23,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718421761] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:26:23,642 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:26:23,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-08-21 18:26:23,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996717033] [2021-08-21 18:26:23,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 18:26:23,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:26:23,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 18:26:23,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2021-08-21 18:26:23,643 INFO L87 Difference]: Start difference. First operand 12831 states and 26023 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:26:28,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:26:28,186 INFO L93 Difference]: Finished difference Result 26456 states and 53388 transitions. [2021-08-21 18:26:28,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-08-21 18:26:28,186 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 18:26:28,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:26:28,232 INFO L225 Difference]: With dead ends: 26456 [2021-08-21 18:26:28,233 INFO L226 Difference]: Without dead ends: 26448 [2021-08-21 18:26:28,234 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2760 ImplicationChecksByTransitivity, 3294.9ms TimeCoverageRelationStatistics Valid=1030, Invalid=7712, Unknown=0, NotChecked=0, Total=8742 [2021-08-21 18:26:28,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26448 states. [2021-08-21 18:26:28,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26448 to 12831. [2021-08-21 18:26:28,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12831 states, 12830 states have (on average 2.0282930631332814) internal successors, (26023), 12830 states have internal predecessors, (26023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:26:28,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12831 states to 12831 states and 26023 transitions. [2021-08-21 18:26:28,475 INFO L78 Accepts]: Start accepts. Automaton has 12831 states and 26023 transitions. Word has length 39 [2021-08-21 18:26:28,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:26:28,475 INFO L470 AbstractCegarLoop]: Abstraction has 12831 states and 26023 transitions. [2021-08-21 18:26:28,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:26:28,475 INFO L276 IsEmpty]: Start isEmpty. Operand 12831 states and 26023 transitions. [2021-08-21 18:26:28,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:26:28,492 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:26:28,492 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:26:28,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-21 18:26:28,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:26:28,692 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:26:28,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:26:28,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1233515007, now seen corresponding path program 30 times [2021-08-21 18:26:28,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:26:28,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866819331] [2021-08-21 18:26:28,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:26:28,693 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:26:28,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:26:29,149 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:26:29,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:26:29,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866819331] [2021-08-21 18:26:29,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866819331] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:26:29,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69658115] [2021-08-21 18:26:29,149 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:26:29,149 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:26:29,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:26:29,150 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:26:29,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-21 18:26:30,511 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 18:26:30,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:26:30,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-21 18:26:30,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:26:31,065 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:26:31,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 53 [2021-08-21 18:26:32,177 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-21 18:26:32,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 62 [2021-08-21 18:26:32,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:26:32,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-08-21 18:26:32,634 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:26:32,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69658115] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:26:32,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:26:32,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-08-21 18:26:32,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182214205] [2021-08-21 18:26:32,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 18:26:32,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:26:32,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 18:26:32,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:26:32,635 INFO L87 Difference]: Start difference. First operand 12831 states and 26023 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:26:36,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:26:36,521 INFO L93 Difference]: Finished difference Result 23719 states and 47937 transitions. [2021-08-21 18:26:36,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-08-21 18:26:36,521 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 18:26:36,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:26:36,557 INFO L225 Difference]: With dead ends: 23719 [2021-08-21 18:26:36,557 INFO L226 Difference]: Without dead ends: 23700 [2021-08-21 18:26:36,557 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1903 ImplicationChecksByTransitivity, 3021.1ms TimeCoverageRelationStatistics Valid=679, Invalid=5963, Unknown=0, NotChecked=0, Total=6642 [2021-08-21 18:26:36,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23700 states. [2021-08-21 18:26:36,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23700 to 12841. [2021-08-21 18:26:36,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12841 states, 12840 states have (on average 2.0292834890965734) internal successors, (26056), 12840 states have internal predecessors, (26056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:26:36,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12841 states to 12841 states and 26056 transitions. [2021-08-21 18:26:36,765 INFO L78 Accepts]: Start accepts. Automaton has 12841 states and 26056 transitions. Word has length 39 [2021-08-21 18:26:36,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:26:36,765 INFO L470 AbstractCegarLoop]: Abstraction has 12841 states and 26056 transitions. [2021-08-21 18:26:36,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:26:36,765 INFO L276 IsEmpty]: Start isEmpty. Operand 12841 states and 26056 transitions. [2021-08-21 18:26:36,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:26:36,784 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:26:36,784 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:26:36,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-21 18:26:36,984 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,SelfDestructingSolverStorable33 [2021-08-21 18:26:36,984 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:26:36,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:26:36,985 INFO L82 PathProgramCache]: Analyzing trace with hash -2046804677, now seen corresponding path program 31 times [2021-08-21 18:26:36,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:26:36,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372372581] [2021-08-21 18:26:36,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:26:36,985 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:26:37,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:26:37,508 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:26:37,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:26:37,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372372581] [2021-08-21 18:26:37,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372372581] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:26:37,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678866828] [2021-08-21 18:26:37,508 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:26:37,508 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:26:37,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:26:37,509 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:26:37,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-21 18:26:38,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:26:38,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 18:26:38,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:26:39,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-08-21 18:26:39,535 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:26:39,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-08-21 18:26:39,629 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:26:39,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678866828] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:26:39,629 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:26:39,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-21 18:26:39,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44428089] [2021-08-21 18:26:39,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 18:26:39,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:26:39,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 18:26:39,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:26:39,630 INFO L87 Difference]: Start difference. First operand 12841 states and 26056 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:26:41,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:26:41,982 INFO L93 Difference]: Finished difference Result 30388 states and 61509 transitions. [2021-08-21 18:26:41,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 18:26:41,983 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 18:26:41,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:26:42,031 INFO L225 Difference]: With dead ends: 30388 [2021-08-21 18:26:42,031 INFO L226 Difference]: Without dead ends: 30369 [2021-08-21 18:26:42,032 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1046 ImplicationChecksByTransitivity, 1650.6ms TimeCoverageRelationStatistics Valid=449, Invalid=3211, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 18:26:42,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30369 states. [2021-08-21 18:26:42,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30369 to 13023. [2021-08-21 18:26:42,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13023 states, 13022 states have (on average 2.044770388573184) internal successors, (26627), 13022 states have internal predecessors, (26627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:26:42,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13023 states to 13023 states and 26627 transitions. [2021-08-21 18:26:42,319 INFO L78 Accepts]: Start accepts. Automaton has 13023 states and 26627 transitions. Word has length 39 [2021-08-21 18:26:42,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:26:42,319 INFO L470 AbstractCegarLoop]: Abstraction has 13023 states and 26627 transitions. [2021-08-21 18:26:42,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:26:42,319 INFO L276 IsEmpty]: Start isEmpty. Operand 13023 states and 26627 transitions. [2021-08-21 18:26:42,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:26:42,336 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:26:42,336 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:26:42,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-21 18:26:42,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:26:42,537 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:26:42,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:26:42,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1345282559, now seen corresponding path program 32 times [2021-08-21 18:26:42,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:26:42,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703192442] [2021-08-21 18:26:42,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:26:42,538 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:26:42,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:26:42,993 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:26:42,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:26:42,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703192442] [2021-08-21 18:26:42,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703192442] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:26:42,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949776145] [2021-08-21 18:26:42,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:26:42,993 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:26:42,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:26:42,994 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:26:42,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-21 18:26:44,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:26:44,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:26:44,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 18:26:44,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:26:45,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-08-21 18:26:45,106 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:26:45,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-08-21 18:26:45,201 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:26:45,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949776145] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:26:45,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:26:45,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-21 18:26:45,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083815412] [2021-08-21 18:26:45,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 18:26:45,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:26:45,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 18:26:45,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:26:45,202 INFO L87 Difference]: Start difference. First operand 13023 states and 26627 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:26:47,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:26:47,621 INFO L93 Difference]: Finished difference Result 31099 states and 63266 transitions. [2021-08-21 18:26:47,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-21 18:26:47,622 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 18:26:47,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:26:47,673 INFO L225 Difference]: With dead ends: 31099 [2021-08-21 18:26:47,673 INFO L226 Difference]: Without dead ends: 31075 [2021-08-21 18:26:47,674 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 1766.0ms TimeCoverageRelationStatistics Valid=521, Invalid=3385, Unknown=0, NotChecked=0, Total=3906 [2021-08-21 18:26:47,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31075 states. [2021-08-21 18:26:47,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31075 to 13043. [2021-08-21 18:26:47,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13043 states, 13042 states have (on average 2.0461585646373255) internal successors, (26686), 13042 states have internal predecessors, (26686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:26:47,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13043 states to 13043 states and 26686 transitions. [2021-08-21 18:26:47,924 INFO L78 Accepts]: Start accepts. Automaton has 13043 states and 26686 transitions. Word has length 39 [2021-08-21 18:26:47,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:26:47,924 INFO L470 AbstractCegarLoop]: Abstraction has 13043 states and 26686 transitions. [2021-08-21 18:26:47,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:26:47,925 INFO L276 IsEmpty]: Start isEmpty. Operand 13043 states and 26686 transitions. [2021-08-21 18:26:47,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:26:47,942 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:26:47,942 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:26:47,963 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 18:26:48,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:26:48,143 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:26:48,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:26:48,143 INFO L82 PathProgramCache]: Analyzing trace with hash 2144697019, now seen corresponding path program 33 times [2021-08-21 18:26:48,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:26:48,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678234308] [2021-08-21 18:26:48,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:26:48,144 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:26:48,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:26:48,573 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:26:48,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:26:48,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678234308] [2021-08-21 18:26:48,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678234308] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:26:48,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918239313] [2021-08-21 18:26:48,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:26:48,573 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:26:48,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:26:48,574 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:26:48,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-21 18:26:50,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:26:50,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:26:50,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-21 18:26:50,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:26:50,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-08-21 18:26:50,766 INFO L354 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2021-08-21 18:26:50,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 57 [2021-08-21 18:26:50,868 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:26:50,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2021-08-21 18:26:50,965 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:26:50,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918239313] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:26:50,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:26:50,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-08-21 18:26:50,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145832729] [2021-08-21 18:26:50,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 18:26:50,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:26:50,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 18:26:50,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2021-08-21 18:26:50,966 INFO L87 Difference]: Start difference. First operand 13043 states and 26686 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:26:57,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:26:57,262 INFO L93 Difference]: Finished difference Result 30517 states and 62465 transitions. [2021-08-21 18:26:57,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-08-21 18:26:57,262 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 18:26:57,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:26:57,310 INFO L225 Difference]: With dead ends: 30517 [2021-08-21 18:26:57,310 INFO L226 Difference]: Without dead ends: 30501 [2021-08-21 18:26:57,311 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5603 ImplicationChecksByTransitivity, 4932.9ms TimeCoverageRelationStatistics Valid=2307, Invalid=12455, Unknown=0, NotChecked=0, Total=14762 [2021-08-21 18:26:57,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30501 states. [2021-08-21 18:26:57,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30501 to 13077. [2021-08-21 18:26:57,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13077 states, 13076 states have (on average 2.046956255735699) internal successors, (26766), 13076 states have internal predecessors, (26766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:26:57,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13077 states to 13077 states and 26766 transitions. [2021-08-21 18:26:57,561 INFO L78 Accepts]: Start accepts. Automaton has 13077 states and 26766 transitions. Word has length 39 [2021-08-21 18:26:57,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:26:57,561 INFO L470 AbstractCegarLoop]: Abstraction has 13077 states and 26766 transitions. [2021-08-21 18:26:57,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:26:57,561 INFO L276 IsEmpty]: Start isEmpty. Operand 13077 states and 26766 transitions. [2021-08-21 18:26:57,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:26:57,577 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:26:57,577 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:26:57,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-21 18:26:57,781 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,SelfDestructingSolverStorable36 [2021-08-21 18:26:57,781 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:26:57,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:26:57,781 INFO L82 PathProgramCache]: Analyzing trace with hash 527585471, now seen corresponding path program 34 times [2021-08-21 18:26:57,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:26:57,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560511619] [2021-08-21 18:26:57,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:26:57,782 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:26:57,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:26:58,214 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:26:58,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:26:58,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560511619] [2021-08-21 18:26:58,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560511619] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:26:58,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45153475] [2021-08-21 18:26:58,214 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:26:58,214 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:26:58,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:26:58,215 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:26:58,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-21 18:26:59,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:26:59,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:26:59,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 18:26:59,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:27:00,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-08-21 18:27:00,353 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:27:00,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-08-21 18:27:00,470 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:27:00,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45153475] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:27:00,470 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:27:00,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-21 18:27:00,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630395613] [2021-08-21 18:27:00,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 18:27:00,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:27:00,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 18:27:00,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:27:00,471 INFO L87 Difference]: Start difference. First operand 13077 states and 26766 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:27:02,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:27:02,760 INFO L93 Difference]: Finished difference Result 31731 states and 64759 transitions. [2021-08-21 18:27:02,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 18:27:02,760 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 18:27:02,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:27:02,819 INFO L225 Difference]: With dead ends: 31731 [2021-08-21 18:27:02,819 INFO L226 Difference]: Without dead ends: 31723 [2021-08-21 18:27:02,819 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 1408.7ms TimeCoverageRelationStatistics Valid=395, Invalid=2467, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 18:27:02,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31723 states. [2021-08-21 18:27:03,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31723 to 13469. [2021-08-21 18:27:03,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13469 states, 13468 states have (on average 2.05984555984556) internal successors, (27742), 13468 states have internal predecessors, (27742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:27:03,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13469 states to 13469 states and 27742 transitions. [2021-08-21 18:27:03,098 INFO L78 Accepts]: Start accepts. Automaton has 13469 states and 27742 transitions. Word has length 39 [2021-08-21 18:27:03,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:27:03,099 INFO L470 AbstractCegarLoop]: Abstraction has 13469 states and 27742 transitions. [2021-08-21 18:27:03,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:27:03,099 INFO L276 IsEmpty]: Start isEmpty. Operand 13469 states and 27742 transitions. [2021-08-21 18:27:03,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:27:03,116 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:27:03,116 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:27:03,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-21 18:27:03,316 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,SelfDestructingSolverStorable37 [2021-08-21 18:27:03,316 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:27:03,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:27:03,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1760092541, now seen corresponding path program 35 times [2021-08-21 18:27:03,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:27:03,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366347043] [2021-08-21 18:27:03,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:27:03,317 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:27:03,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:27:03,706 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:27:03,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:27:03,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366347043] [2021-08-21 18:27:03,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366347043] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:27:03,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208206407] [2021-08-21 18:27:03,707 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:27:03,707 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:27:03,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:27:03,709 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:27:03,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-21 18:27:05,386 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:27:05,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:27:05,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-21 18:27:05,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:27:05,724 INFO L354 Elim1Store]: treesize reduction 38, result has 43.3 percent of original size [2021-08-21 18:27:05,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 54 [2021-08-21 18:27:06,186 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 18:27:06,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 36 [2021-08-21 18:27:06,287 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:27:06,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208206407] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:27:06,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:27:06,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-08-21 18:27:06,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838340454] [2021-08-21 18:27:06,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 18:27:06,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:27:06,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 18:27:06,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:27:06,288 INFO L87 Difference]: Start difference. First operand 13469 states and 27742 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:27:09,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:27:09,406 INFO L93 Difference]: Finished difference Result 24756 states and 50278 transitions. [2021-08-21 18:27:09,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-21 18:27:09,407 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 18:27:09,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:27:09,447 INFO L225 Difference]: With dead ends: 24756 [2021-08-21 18:27:09,447 INFO L226 Difference]: Without dead ends: 24744 [2021-08-21 18:27:09,447 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1055 ImplicationChecksByTransitivity, 2207.0ms TimeCoverageRelationStatistics Valid=568, Invalid=4124, Unknown=0, NotChecked=0, Total=4692 [2021-08-21 18:27:09,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24744 states. [2021-08-21 18:27:09,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24744 to 13498. [2021-08-21 18:27:09,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13498 states, 13497 states have (on average 2.060457879528784) internal successors, (27810), 13497 states have internal predecessors, (27810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:27:09,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13498 states to 13498 states and 27810 transitions. [2021-08-21 18:27:09,660 INFO L78 Accepts]: Start accepts. Automaton has 13498 states and 27810 transitions. Word has length 39 [2021-08-21 18:27:09,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:27:09,661 INFO L470 AbstractCegarLoop]: Abstraction has 13498 states and 27810 transitions. [2021-08-21 18:27:09,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:27:09,661 INFO L276 IsEmpty]: Start isEmpty. Operand 13498 states and 27810 transitions. [2021-08-21 18:27:09,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:27:09,678 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:27:09,678 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:27:09,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-21 18:27:09,878 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,SelfDestructingSolverStorable38 [2021-08-21 18:27:09,879 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:27:09,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:27:09,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1398892301, now seen corresponding path program 36 times [2021-08-21 18:27:09,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:27:09,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013560265] [2021-08-21 18:27:09,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:27:09,879 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:27:09,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:27:10,246 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:27:10,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:27:10,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013560265] [2021-08-21 18:27:10,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013560265] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:27:10,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850443086] [2021-08-21 18:27:10,246 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:27:10,246 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:27:10,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:27:10,247 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:27:10,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-21 18:27:11,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 18:27:11,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:27:11,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-21 18:27:11,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:27:12,305 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-21 18:27:12,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 50 [2021-08-21 18:27:12,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:27:12,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 18:27:12,637 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:27:12,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 44 [2021-08-21 18:27:12,936 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:27:12,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2021-08-21 18:27:13,056 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:27:13,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850443086] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:27:13,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:27:13,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2021-08-21 18:27:13,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249814306] [2021-08-21 18:27:13,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 18:27:13,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:27:13,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 18:27:13,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 18:27:13,057 INFO L87 Difference]: Start difference. First operand 13498 states and 27810 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:27:17,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:27:17,328 INFO L93 Difference]: Finished difference Result 23892 states and 48674 transitions. [2021-08-21 18:27:17,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-08-21 18:27:17,328 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 18:27:17,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:27:17,366 INFO L225 Difference]: With dead ends: 23892 [2021-08-21 18:27:17,366 INFO L226 Difference]: Without dead ends: 23876 [2021-08-21 18:27:17,367 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2279 ImplicationChecksByTransitivity, 3206.5ms TimeCoverageRelationStatistics Valid=861, Invalid=7329, Unknown=0, NotChecked=0, Total=8190 [2021-08-21 18:27:17,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23876 states. [2021-08-21 18:27:17,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23876 to 13536. [2021-08-21 18:27:17,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13536 states, 13535 states have (on average 2.059992611747322) internal successors, (27882), 13535 states have internal predecessors, (27882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:27:17,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13536 states to 13536 states and 27882 transitions. [2021-08-21 18:27:17,579 INFO L78 Accepts]: Start accepts. Automaton has 13536 states and 27882 transitions. Word has length 39 [2021-08-21 18:27:17,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:27:17,579 INFO L470 AbstractCegarLoop]: Abstraction has 13536 states and 27882 transitions. [2021-08-21 18:27:17,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:27:17,580 INFO L276 IsEmpty]: Start isEmpty. Operand 13536 states and 27882 transitions. [2021-08-21 18:27:17,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:27:17,596 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:27:17,596 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:27:17,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-21 18:27:17,796 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,SelfDestructingSolverStorable39 [2021-08-21 18:27:17,796 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:27:17,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:27:17,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1389693843, now seen corresponding path program 37 times [2021-08-21 18:27:17,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:27:17,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134031415] [2021-08-21 18:27:17,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:27:17,797 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:27:17,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:27:18,195 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:27:18,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:27:18,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134031415] [2021-08-21 18:27:18,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134031415] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:27:18,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288772026] [2021-08-21 18:27:18,196 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:27:18,196 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:27:18,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:27:18,197 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:27:18,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-21 18:27:19,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:27:20,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 18:27:20,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:27:20,325 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:27:20,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-08-21 18:27:20,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-21 18:27:20,708 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:27:20,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288772026] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:27:20,708 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:27:20,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-21 18:27:20,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749321015] [2021-08-21 18:27:20,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 18:27:20,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:27:20,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 18:27:20,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:27:20,720 INFO L87 Difference]: Start difference. First operand 13536 states and 27882 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:27:22,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:27:22,615 INFO L93 Difference]: Finished difference Result 26320 states and 53264 transitions. [2021-08-21 18:27:22,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 18:27:22,616 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 18:27:22,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:27:22,659 INFO L225 Difference]: With dead ends: 26320 [2021-08-21 18:27:22,659 INFO L226 Difference]: Without dead ends: 26308 [2021-08-21 18:27:22,660 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1194.0ms TimeCoverageRelationStatistics Valid=384, Invalid=2372, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 18:27:22,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26308 states. [2021-08-21 18:27:22,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26308 to 13538. [2021-08-21 18:27:22,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13538 states, 13537 states have (on average 2.0596882618009897) internal successors, (27882), 13537 states have internal predecessors, (27882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:27:22,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13538 states to 13538 states and 27882 transitions. [2021-08-21 18:27:22,894 INFO L78 Accepts]: Start accepts. Automaton has 13538 states and 27882 transitions. Word has length 39 [2021-08-21 18:27:22,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:27:22,894 INFO L470 AbstractCegarLoop]: Abstraction has 13538 states and 27882 transitions. [2021-08-21 18:27:22,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:27:22,894 INFO L276 IsEmpty]: Start isEmpty. Operand 13538 states and 27882 transitions. [2021-08-21 18:27:22,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:27:22,911 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:27:22,911 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:27:22,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-21 18:27:23,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:27:23,112 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:27:23,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:27:23,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1750894083, now seen corresponding path program 38 times [2021-08-21 18:27:23,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:27:23,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615102289] [2021-08-21 18:27:23,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:27:23,113 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:27:23,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:27:23,507 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:27:23,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:27:23,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615102289] [2021-08-21 18:27:23,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615102289] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:27:23,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050975621] [2021-08-21 18:27:23,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:27:23,508 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:27:23,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:27:23,509 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:27:23,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-21 18:27:25,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:27:25,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:27:25,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 18:27:25,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:27:25,748 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:27:25,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-08-21 18:27:25,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-08-21 18:27:26,007 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:27:26,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050975621] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:27:26,007 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:27:26,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-21 18:27:26,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506544417] [2021-08-21 18:27:26,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 18:27:26,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:27:26,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 18:27:26,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:27:26,008 INFO L87 Difference]: Start difference. First operand 13538 states and 27882 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:27:27,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:27:27,553 INFO L93 Difference]: Finished difference Result 27928 states and 56811 transitions. [2021-08-21 18:27:27,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 18:27:27,554 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 18:27:27,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:27:27,601 INFO L225 Difference]: With dead ends: 27928 [2021-08-21 18:27:27,602 INFO L226 Difference]: Without dead ends: 27920 [2021-08-21 18:27:27,602 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 1072.1ms TimeCoverageRelationStatistics Valid=354, Invalid=2298, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 18:27:27,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27920 states. [2021-08-21 18:27:27,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27920 to 13522. [2021-08-21 18:27:27,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13522 states, 13521 states have (on average 2.060202647733156) internal successors, (27856), 13521 states have internal predecessors, (27856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:27:27,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13522 states to 13522 states and 27856 transitions. [2021-08-21 18:27:27,849 INFO L78 Accepts]: Start accepts. Automaton has 13522 states and 27856 transitions. Word has length 39 [2021-08-21 18:27:27,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:27:27,849 INFO L470 AbstractCegarLoop]: Abstraction has 13522 states and 27856 transitions. [2021-08-21 18:27:27,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:27:27,849 INFO L276 IsEmpty]: Start isEmpty. Operand 13522 states and 27856 transitions. [2021-08-21 18:27:27,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:27:27,866 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:27:27,866 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:27:27,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-21 18:27:28,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-08-21 18:27:28,067 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:27:28,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:27:28,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1841076481, now seen corresponding path program 39 times [2021-08-21 18:27:28,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:27:28,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754395553] [2021-08-21 18:27:28,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:27:28,068 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:27:28,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:27:28,554 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:27:28,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:27:28,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754395553] [2021-08-21 18:27:28,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754395553] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:27:28,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600682329] [2021-08-21 18:27:28,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:27:28,554 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:27:28,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:27:28,557 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:27:28,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-21 18:27:30,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:27:30,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:27:30,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 18:27:30,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:27:30,911 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:27:30,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-08-21 18:27:31,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-21 18:27:31,136 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:27:31,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600682329] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:27:31,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:27:31,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-21 18:27:31,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353512574] [2021-08-21 18:27:31,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 18:27:31,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:27:31,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 18:27:31,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:27:31,137 INFO L87 Difference]: Start difference. First operand 13522 states and 27856 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:27:32,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:27:32,651 INFO L93 Difference]: Finished difference Result 26839 states and 54361 transitions. [2021-08-21 18:27:32,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 18:27:32,651 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 18:27:32,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:27:32,694 INFO L225 Difference]: With dead ends: 26839 [2021-08-21 18:27:32,694 INFO L226 Difference]: Without dead ends: 26827 [2021-08-21 18:27:32,694 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 1205.1ms TimeCoverageRelationStatistics Valid=409, Invalid=2243, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 18:27:32,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26827 states. [2021-08-21 18:27:32,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26827 to 13562. [2021-08-21 18:27:32,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13562 states, 13561 states have (on average 2.0603937762701867) internal successors, (27941), 13561 states have internal predecessors, (27941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:27:32,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13562 states to 13562 states and 27941 transitions. [2021-08-21 18:27:32,925 INFO L78 Accepts]: Start accepts. Automaton has 13562 states and 27941 transitions. Word has length 39 [2021-08-21 18:27:32,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:27:32,925 INFO L470 AbstractCegarLoop]: Abstraction has 13562 states and 27941 transitions. [2021-08-21 18:27:32,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:27:32,926 INFO L276 IsEmpty]: Start isEmpty. Operand 13562 states and 27941 transitions. [2021-08-21 18:27:32,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:27:32,944 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:27:32,944 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:27:32,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-21 18:27:33,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-08-21 18:27:33,145 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:27:33,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:27:33,145 INFO L82 PathProgramCache]: Analyzing trace with hash 589174959, now seen corresponding path program 40 times [2021-08-21 18:27:33,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:27:33,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830103746] [2021-08-21 18:27:33,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:27:33,145 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:27:33,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:27:33,503 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:27:33,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:27:33,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830103746] [2021-08-21 18:27:33,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830103746] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:27:33,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921017903] [2021-08-21 18:27:33,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:27:33,504 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:27:33,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:27:33,505 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:27:33,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-21 18:27:35,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:27:35,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:27:35,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 18:27:35,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:27:35,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-08-21 18:27:35,999 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:27:36,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-08-21 18:27:36,091 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:27:36,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921017903] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:27:36,091 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:27:36,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-21 18:27:36,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652450705] [2021-08-21 18:27:36,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 18:27:36,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:27:36,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 18:27:36,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:27:36,092 INFO L87 Difference]: Start difference. First operand 13562 states and 27941 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:27:37,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:27:37,668 INFO L93 Difference]: Finished difference Result 28976 states and 59195 transitions. [2021-08-21 18:27:37,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 18:27:37,668 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 18:27:37,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:27:37,716 INFO L225 Difference]: With dead ends: 28976 [2021-08-21 18:27:37,717 INFO L226 Difference]: Without dead ends: 28968 [2021-08-21 18:27:37,717 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 1122.4ms TimeCoverageRelationStatistics Valid=414, Invalid=2136, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 18:27:37,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28968 states. [2021-08-21 18:27:37,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28968 to 13608. [2021-08-21 18:27:37,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13608 states, 13607 states have (on average 2.0612919820680533) internal successors, (28048), 13607 states have internal predecessors, (28048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:27:37,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13608 states to 13608 states and 28048 transitions. [2021-08-21 18:27:37,968 INFO L78 Accepts]: Start accepts. Automaton has 13608 states and 28048 transitions. Word has length 39 [2021-08-21 18:27:37,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:27:37,968 INFO L470 AbstractCegarLoop]: Abstraction has 13608 states and 28048 transitions. [2021-08-21 18:27:37,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:27:37,969 INFO L276 IsEmpty]: Start isEmpty. Operand 13608 states and 28048 transitions. [2021-08-21 18:27:37,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:27:37,987 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:27:37,987 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:27:38,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-21 18:27:38,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-08-21 18:27:38,188 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:27:38,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:27:38,188 INFO L82 PathProgramCache]: Analyzing trace with hash 80791521, now seen corresponding path program 41 times [2021-08-21 18:27:38,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:27:38,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415012762] [2021-08-21 18:27:38,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:27:38,188 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:27:38,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:27:38,662 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:27:38,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:27:38,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415012762] [2021-08-21 18:27:38,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415012762] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:27:38,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909578175] [2021-08-21 18:27:38,662 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:27:38,663 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:27:38,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:27:38,663 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:27:38,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-21 18:27:40,681 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:27:40,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:27:40,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-21 18:27:40,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:27:41,130 INFO L354 Elim1Store]: treesize reduction 34, result has 44.3 percent of original size [2021-08-21 18:27:41,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 57 [2021-08-21 18:27:41,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2021-08-21 18:27:41,690 INFO L354 Elim1Store]: treesize reduction 54, result has 11.5 percent of original size [2021-08-21 18:27:41,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 23 [2021-08-21 18:27:41,753 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:27:41,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909578175] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:27:41,753 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:27:41,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-08-21 18:27:41,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591242158] [2021-08-21 18:27:41,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 18:27:41,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:27:41,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 18:27:41,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:27:41,754 INFO L87 Difference]: Start difference. First operand 13608 states and 28048 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:27:45,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:27:45,220 INFO L93 Difference]: Finished difference Result 23802 states and 48512 transitions. [2021-08-21 18:27:45,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-21 18:27:45,221 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-21 18:27:45,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:27:45,260 INFO L225 Difference]: With dead ends: 23802 [2021-08-21 18:27:45,261 INFO L226 Difference]: Without dead ends: 23794 [2021-08-21 18:27:45,261 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 2445.1ms TimeCoverageRelationStatistics Valid=581, Invalid=4389, Unknown=0, NotChecked=0, Total=4970 [2021-08-21 18:27:45,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23794 states. [2021-08-21 18:27:45,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23794 to 13613. [2021-08-21 18:27:45,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13613 states, 13612 states have (on average 2.061563326476638) internal successors, (28062), 13612 states have internal predecessors, (28062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:27:45,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13613 states to 13613 states and 28062 transitions. [2021-08-21 18:27:45,532 INFO L78 Accepts]: Start accepts. Automaton has 13613 states and 28062 transitions. Word has length 39 [2021-08-21 18:27:45,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:27:45,532 INFO L470 AbstractCegarLoop]: Abstraction has 13613 states and 28062 transitions. [2021-08-21 18:27:45,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:27:45,532 INFO L276 IsEmpty]: Start isEmpty. Operand 13613 states and 28062 transitions. [2021-08-21 18:27:45,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 18:27:45,552 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:27:45,552 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:27:45,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-21 18:27:45,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:27:45,753 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-21 18:27:45,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:27:45,753 INFO L82 PathProgramCache]: Analyzing trace with hash -291797155, now seen corresponding path program 42 times [2021-08-21 18:27:45,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:27:45,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699502695] [2021-08-21 18:27:45,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:27:45,753 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:27:45,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:27:46,151 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:27:46,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:27:46,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699502695] [2021-08-21 18:27:46,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699502695] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:27:46,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976504108] [2021-08-21 18:27:46,152 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:27:46,152 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:27:46,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:27:46,153 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:27:46,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-21 18:27:48,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 18:27:48,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:27:48,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-21 18:27:48,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:27:48,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:27:48,614 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:27:48,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 40 [2021-08-21 18:27:48,896 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:27:48,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 54 [2021-08-21 18:27:50,600 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2021-08-21 18:27:50,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-21 18:27:50,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:27:50,821 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Alternating quantifiers not yet supported at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:313) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:95) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:80) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:75) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:903) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:865) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:783) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:425) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:162) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:65) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:251) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:235) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminateCompat(PartialQuantifierElimination.java:128) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminateCompat(PartialQuantifierElimination.java:151) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:245) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:438) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:200) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-08-21 18:27:50,823 INFO L168 Benchmark]: Toolchain (without parser) took 199612.49 ms. Allocated memory was 187.7 MB in the beginning and 1.2 GB in the end (delta: 975.2 MB). Free memory was 167.1 MB in the beginning and 328.9 MB in the end (delta: -161.8 MB). Peak memory consumption was 813.0 MB. Max. memory is 8.0 GB. [2021-08-21 18:27:50,823 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.43 ms. Allocated memory is still 187.7 MB. Free memory is still 168.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 18:27:50,823 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.14 ms. Allocated memory is still 187.7 MB. Free memory was 167.1 MB in the beginning and 165.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-21 18:27:50,823 INFO L168 Benchmark]: Boogie Preprocessor took 27.76 ms. Allocated memory is still 187.7 MB. Free memory was 165.5 MB in the beginning and 164.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 18:27:50,823 INFO L168 Benchmark]: RCFGBuilder took 271.40 ms. Allocated memory is still 187.7 MB. Free memory was 164.4 MB in the beginning and 148.9 MB in the end (delta: 15.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-08-21 18:27:50,823 INFO L168 Benchmark]: TraceAbstraction took 199277.97 ms. Allocated memory was 187.7 MB in the beginning and 1.2 GB in the end (delta: 975.2 MB). Free memory was 148.4 MB in the beginning and 328.9 MB in the end (delta: -180.5 MB). Peak memory consumption was 794.1 MB. Max. memory is 8.0 GB. [2021-08-21 18:27:50,824 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.43 ms. Allocated memory is still 187.7 MB. Free memory is still 168.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 22.14 ms. Allocated memory is still 187.7 MB. Free memory was 167.1 MB in the beginning and 165.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 27.76 ms. Allocated memory is still 187.7 MB. Free memory was 165.5 MB in the beginning and 164.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 271.40 ms. Allocated memory is still 187.7 MB. Free memory was 164.4 MB in the beginning and 148.9 MB in the end (delta: 15.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 199277.97 ms. Allocated memory was 187.7 MB in the beginning and 1.2 GB in the end (delta: 975.2 MB). Free memory was 148.4 MB in the beginning and 328.9 MB in the end (delta: -180.5 MB). Peak memory consumption was 794.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 2645, positive: 2389, positive conditional: 2389, positive unconditional: 0, negative: 256, negative conditional: 256, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 2444, positive: 2389, positive conditional: 0, positive unconditional: 2389, negative: 55, negative conditional: 0, negative unconditional: 55, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 220, positive: 216, positive conditional: 0, positive unconditional: 216, negative: 4, negative conditional: 0, negative unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 220, positive: 209, positive conditional: 0, positive unconditional: 209, negative: 11, negative conditional: 0, negative unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 11, positive: 7, positive conditional: 0, positive unconditional: 7, negative: 4, negative conditional: 0, negative unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 62, positive: 46, positive conditional: 0, positive unconditional: 46, negative: 16, negative conditional: 0, negative unconditional: 16, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 2444, positive: 2173, positive conditional: 0, positive unconditional: 2173, negative: 51, negative conditional: 0, negative unconditional: 51, unknown: 220, unknown conditional: 0, unknown unconditional: 220] , Statistics on independence cache: Total cache size (in pairs): 220, Positive cache size: 216, Positive conditional cache size: 0, Positive unconditional cache size: 216, Negative cache size: 4, Negative conditional cache size: 0, Negative unconditional cache size: 4, Independence queries for same thread: 201 - ExceptionOrErrorResult: AssertionError: Alternating quantifiers not yet supported de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Alternating quantifiers not yet supported: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-08-21 18:27:50,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...