/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/parallel/bakery-3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 19:48:30,335 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 19:48:30,336 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 19:48:30,382 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-06 19:48:30,430 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf [2021-08-06 19:48:30,466 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 19:48:30,467 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 19:48:30,470 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 19:48:30,470 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 19:48:30,470 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 19:48:30,470 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 19:48:30,470 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 19:48:30,470 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 19:48:30,471 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 19:48:30,471 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 19:48:30,471 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 19:48:30,472 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 19:48:30,472 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 19:48:30,472 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 19:48:30,472 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 19:48:30,472 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 19:48:30,472 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 19:48:30,472 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 19:48:30,473 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 19:48:30,473 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 19:48:30,473 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 19:48:30,473 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 19:48:30,473 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 19:48:30,473 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 19:48:30,473 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 19:48:30,474 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 19:48:30,474 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 19:48:30,474 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 19:48:30,474 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 19:48:30,474 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-06 19:48:30,474 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 19:48:30,775 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 19:48:30,803 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 19:48:30,805 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 19:48:30,806 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 19:48:30,806 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 19:48:30,807 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/bakery-3.wvr.bpl [2021-08-06 19:48:30,807 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/bakery-3.wvr.bpl' [2021-08-06 19:48:30,848 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 19:48:30,849 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 19:48:30,850 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 19:48:30,850 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 19:48:30,851 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 19:48:30,861 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:48:30" (1/1) ... [2021-08-06 19:48:30,870 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:48:30" (1/1) ... [2021-08-06 19:48:30,880 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 19:48:30,881 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 19:48:30,882 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 19:48:30,882 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 19:48:30,887 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:48:30" (1/1) ... [2021-08-06 19:48:30,888 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:48:30" (1/1) ... [2021-08-06 19:48:30,888 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:48:30" (1/1) ... [2021-08-06 19:48:30,889 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:48:30" (1/1) ... [2021-08-06 19:48:30,892 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:48:30" (1/1) ... [2021-08-06 19:48:30,892 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:48:30" (1/1) ... [2021-08-06 19:48:30,893 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:48:30" (1/1) ... [2021-08-06 19:48:30,894 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 19:48:30,895 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 19:48:30,895 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 19:48:30,895 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 19:48:30,896 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:48:30" (1/1) ... [2021-08-06 19:48:30,902 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 19:48:30,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:48:30,918 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-06 19:48:30,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-06 19:48:30,948 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 19:48:30,949 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 19:48:30,949 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 19:48:30,949 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 19:48:30,949 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 19:48:30,949 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 19:48:30,949 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 19:48:30,949 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 19:48:30,949 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 19:48:30,949 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-06 19:48:30,950 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-06 19:48:30,950 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-06 19:48:30,950 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-06 19:48:31,197 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 19:48:31,197 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-06 19:48:31,199 INFO L202 PluginConnector]: Adding new model bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 07:48:31 BoogieIcfgContainer [2021-08-06 19:48:31,199 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 19:48:31,201 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 19:48:31,201 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 19:48:31,203 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 19:48:31,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:48:30" (1/2) ... [2021-08-06 19:48:31,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13caf817 and model type bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 07:48:31, skipping insertion in model container [2021-08-06 19:48:31,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 07:48:31" (2/2) ... [2021-08-06 19:48:31,205 INFO L111 eAbstractionObserver]: Analyzing ICFG bakery-3.wvr.bpl [2021-08-06 19:48:31,208 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 19:48:31,209 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 19:48:31,209 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 19:48:31,209 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 19:48:31,306 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-06 19:48:31,348 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 19:48:31,353 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-06 19:48:31,354 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-06 19:48:31,975 INFO L276 IsEmpty]: Start isEmpty. Operand has 3169 states, 2776 states have (on average 2.2579250720461097) internal successors, (6268), 3168 states have internal predecessors, (6268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:32,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:48:32,025 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:32,026 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:32,027 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:32,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:32,031 INFO L82 PathProgramCache]: Analyzing trace with hash -2104684084, now seen corresponding path program 1 times [2021-08-06 19:48:32,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:32,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850674523] [2021-08-06 19:48:32,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:32,043 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:32,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:32,339 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 19:48:32,346 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 19:48:32,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:48:32,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:32,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850674523] [2021-08-06 19:48:32,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850674523] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:48:32,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:48:32,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-06 19:48:32,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867198255] [2021-08-06 19:48:32,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:48:32,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:32,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:48:32,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:48:32,400 INFO L87 Difference]: Start difference. First operand has 3169 states, 2776 states have (on average 2.2579250720461097) internal successors, (6268), 3168 states have internal predecessors, (6268), 0 states have call successors, (0), 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 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:32,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:32,664 INFO L93 Difference]: Finished difference Result 4138 states and 7848 transitions. [2021-08-06 19:48:32,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:48:32,666 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 19:48:32,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:32,701 INFO L225 Difference]: With dead ends: 4138 [2021-08-06 19:48:32,701 INFO L226 Difference]: Without dead ends: 2975 [2021-08-06 19:48:32,703 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 184.5ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:48:32,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2975 states. [2021-08-06 19:48:32,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2975 to 2479. [2021-08-06 19:48:32,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2479 states, 2478 states have (on average 2.188458434221146) internal successors, (5423), 2478 states have internal predecessors, (5423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:32,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2479 states to 2479 states and 5423 transitions. [2021-08-06 19:48:32,867 INFO L78 Accepts]: Start accepts. Automaton has 2479 states and 5423 transitions. Word has length 48 [2021-08-06 19:48:32,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:32,868 INFO L470 AbstractCegarLoop]: Abstraction has 2479 states and 5423 transitions. [2021-08-06 19:48:32,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:32,868 INFO L276 IsEmpty]: Start isEmpty. Operand 2479 states and 5423 transitions. [2021-08-06 19:48:32,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:48:32,875 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:32,876 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:32,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 19:48:32,876 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:32,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:32,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1628197592, now seen corresponding path program 2 times [2021-08-06 19:48:32,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:32,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207393590] [2021-08-06 19:48:32,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:32,878 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:32,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:33,007 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 78.8 percent of original size [2021-08-06 19:48:33,022 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 78.8 percent of original size [2021-08-06 19:48:33,102 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 19:48:33,103 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 19:48:33,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:48:33,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:33,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207393590] [2021-08-06 19:48:33,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207393590] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:48:33,110 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:48:33,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 19:48:33,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411321597] [2021-08-06 19:48:33,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 19:48:33,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:33,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 19:48:33,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-06 19:48:33,114 INFO L87 Difference]: Start difference. First operand 2479 states and 5423 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:33,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:33,278 INFO L93 Difference]: Finished difference Result 2753 states and 6053 transitions. [2021-08-06 19:48:33,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 19:48:33,278 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 19:48:33,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:33,291 INFO L225 Difference]: With dead ends: 2753 [2021-08-06 19:48:33,291 INFO L226 Difference]: Without dead ends: 2753 [2021-08-06 19:48:33,292 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.1ms TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:48:33,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2753 states. [2021-08-06 19:48:33,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2753 to 2563. [2021-08-06 19:48:33,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2563 states, 2562 states have (on average 2.1834504293520687) internal successors, (5594), 2562 states have internal predecessors, (5594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:33,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 5594 transitions. [2021-08-06 19:48:33,362 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 5594 transitions. Word has length 48 [2021-08-06 19:48:33,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:33,363 INFO L470 AbstractCegarLoop]: Abstraction has 2563 states and 5594 transitions. [2021-08-06 19:48:33,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:33,363 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 5594 transitions. [2021-08-06 19:48:33,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:48:33,371 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:33,371 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:33,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-06 19:48:33,371 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:33,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:33,372 INFO L82 PathProgramCache]: Analyzing trace with hash -981690184, now seen corresponding path program 3 times [2021-08-06 19:48:33,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:33,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550320491] [2021-08-06 19:48:33,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:33,373 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:33,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:33,523 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 78.8 percent of original size [2021-08-06 19:48:33,527 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 78.8 percent of original size [2021-08-06 19:48:33,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:48:33,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:33,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550320491] [2021-08-06 19:48:33,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550320491] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:48:33,722 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:48:33,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-08-06 19:48:33,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678272339] [2021-08-06 19:48:33,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:48:33,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:33,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:48:33,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:48:33,724 INFO L87 Difference]: Start difference. First operand 2563 states and 5594 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:34,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:34,087 INFO L93 Difference]: Finished difference Result 4203 states and 9509 transitions. [2021-08-06 19:48:34,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:48:34,090 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 19:48:34,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:34,115 INFO L225 Difference]: With dead ends: 4203 [2021-08-06 19:48:34,115 INFO L226 Difference]: Without dead ends: 4203 [2021-08-06 19:48:34,115 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 116.4ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:48:34,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4203 states. [2021-08-06 19:48:34,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4203 to 3135. [2021-08-06 19:48:34,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3135 states, 3134 states have (on average 2.2102744097000637) internal successors, (6927), 3134 states have internal predecessors, (6927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:34,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3135 states to 3135 states and 6927 transitions. [2021-08-06 19:48:34,211 INFO L78 Accepts]: Start accepts. Automaton has 3135 states and 6927 transitions. Word has length 48 [2021-08-06 19:48:34,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:34,212 INFO L470 AbstractCegarLoop]: Abstraction has 3135 states and 6927 transitions. [2021-08-06 19:48:34,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:34,212 INFO L276 IsEmpty]: Start isEmpty. Operand 3135 states and 6927 transitions. [2021-08-06 19:48:34,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:48:34,220 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:34,220 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:34,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-06 19:48:34,221 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:34,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:34,223 INFO L82 PathProgramCache]: Analyzing trace with hash 175364012, now seen corresponding path program 4 times [2021-08-06 19:48:34,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:34,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416651285] [2021-08-06 19:48:34,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:34,223 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:34,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:34,367 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 19:48:34,369 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 19:48:34,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:48:34,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:34,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416651285] [2021-08-06 19:48:34,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416651285] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:48:34,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:48:34,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-06 19:48:34,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123694284] [2021-08-06 19:48:34,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:48:34,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:34,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:48:34,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:48:34,401 INFO L87 Difference]: Start difference. First operand 3135 states and 6927 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:34,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:34,599 INFO L93 Difference]: Finished difference Result 3870 states and 8447 transitions. [2021-08-06 19:48:34,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:48:34,599 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 19:48:34,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:34,615 INFO L225 Difference]: With dead ends: 3870 [2021-08-06 19:48:34,615 INFO L226 Difference]: Without dead ends: 3581 [2021-08-06 19:48:34,615 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 149.6ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:48:34,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3581 states. [2021-08-06 19:48:34,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3581 to 3037. [2021-08-06 19:48:34,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3037 states, 3036 states have (on average 2.19532279314888) internal successors, (6665), 3036 states have internal predecessors, (6665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:34,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3037 states to 3037 states and 6665 transitions. [2021-08-06 19:48:34,694 INFO L78 Accepts]: Start accepts. Automaton has 3037 states and 6665 transitions. Word has length 48 [2021-08-06 19:48:34,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:34,694 INFO L470 AbstractCegarLoop]: Abstraction has 3037 states and 6665 transitions. [2021-08-06 19:48:34,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:34,695 INFO L276 IsEmpty]: Start isEmpty. Operand 3037 states and 6665 transitions. [2021-08-06 19:48:34,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:48:34,701 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:34,701 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:34,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-06 19:48:34,701 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:34,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:34,702 INFO L82 PathProgramCache]: Analyzing trace with hash 750653836, now seen corresponding path program 5 times [2021-08-06 19:48:34,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:34,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088217799] [2021-08-06 19:48:34,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:34,702 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:34,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:34,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:48:34,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:34,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088217799] [2021-08-06 19:48:34,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088217799] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:48:34,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:48:34,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 19:48:34,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274969678] [2021-08-06 19:48:34,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 19:48:34,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:34,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 19:48:34,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:48:34,730 INFO L87 Difference]: Start difference. First operand 3037 states and 6665 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:34,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:34,756 INFO L93 Difference]: Finished difference Result 2960 states and 6398 transitions. [2021-08-06 19:48:34,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 19:48:34,757 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 19:48:34,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:34,769 INFO L225 Difference]: With dead ends: 2960 [2021-08-06 19:48:34,769 INFO L226 Difference]: Without dead ends: 2902 [2021-08-06 19:48:34,769 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:48:34,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2902 states. [2021-08-06 19:48:34,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2902 to 2883. [2021-08-06 19:48:34,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2883 states, 2882 states have (on average 2.182859125607217) internal successors, (6291), 2882 states have internal predecessors, (6291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:34,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2883 states to 2883 states and 6291 transitions. [2021-08-06 19:48:34,854 INFO L78 Accepts]: Start accepts. Automaton has 2883 states and 6291 transitions. Word has length 48 [2021-08-06 19:48:34,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:34,854 INFO L470 AbstractCegarLoop]: Abstraction has 2883 states and 6291 transitions. [2021-08-06 19:48:34,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:34,855 INFO L276 IsEmpty]: Start isEmpty. Operand 2883 states and 6291 transitions. [2021-08-06 19:48:34,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:48:34,862 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:34,862 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:34,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-06 19:48:34,863 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:34,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:34,863 INFO L82 PathProgramCache]: Analyzing trace with hash 212165866, now seen corresponding path program 6 times [2021-08-06 19:48:34,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:34,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320225586] [2021-08-06 19:48:34,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:34,864 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:34,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:34,952 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 72.2 percent of original size [2021-08-06 19:48:34,957 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 72.2 percent of original size [2021-08-06 19:48:35,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:48:35,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:35,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320225586] [2021-08-06 19:48:35,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320225586] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:48:35,047 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:48:35,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-06 19:48:35,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909656026] [2021-08-06 19:48:35,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 19:48:35,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:35,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 19:48:35,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:48:35,049 INFO L87 Difference]: Start difference. First operand 2883 states and 6291 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:35,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:35,240 INFO L93 Difference]: Finished difference Result 2903 states and 6245 transitions. [2021-08-06 19:48:35,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:48:35,242 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 19:48:35,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:35,253 INFO L225 Difference]: With dead ends: 2903 [2021-08-06 19:48:35,253 INFO L226 Difference]: Without dead ends: 2770 [2021-08-06 19:48:35,254 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 72.5ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:48:35,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2770 states. [2021-08-06 19:48:35,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2770 to 2694. [2021-08-06 19:48:35,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2694 states, 2693 states have (on average 2.1637578908280726) internal successors, (5827), 2693 states have internal predecessors, (5827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:35,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2694 states to 2694 states and 5827 transitions. [2021-08-06 19:48:35,311 INFO L78 Accepts]: Start accepts. Automaton has 2694 states and 5827 transitions. Word has length 48 [2021-08-06 19:48:35,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:35,312 INFO L470 AbstractCegarLoop]: Abstraction has 2694 states and 5827 transitions. [2021-08-06 19:48:35,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:35,312 INFO L276 IsEmpty]: Start isEmpty. Operand 2694 states and 5827 transitions. [2021-08-06 19:48:35,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:48:35,317 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:35,317 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:35,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-06 19:48:35,318 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:35,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:35,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1941259390, now seen corresponding path program 7 times [2021-08-06 19:48:35,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:35,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366617433] [2021-08-06 19:48:35,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:35,319 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:35,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:35,375 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 78.8 percent of original size [2021-08-06 19:48:35,379 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 78.8 percent of original size [2021-08-06 19:48:35,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:48:35,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:35,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366617433] [2021-08-06 19:48:35,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366617433] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:48:35,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:48:35,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-08-06 19:48:35,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239881899] [2021-08-06 19:48:35,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:48:35,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:35,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:48:35,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:48:35,525 INFO L87 Difference]: Start difference. First operand 2694 states and 5827 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:35,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:35,835 INFO L93 Difference]: Finished difference Result 3304 states and 7134 transitions. [2021-08-06 19:48:35,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:48:35,836 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 19:48:35,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:35,844 INFO L225 Difference]: With dead ends: 3304 [2021-08-06 19:48:35,844 INFO L226 Difference]: Without dead ends: 3276 [2021-08-06 19:48:35,844 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 164.1ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:48:35,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3276 states. [2021-08-06 19:48:35,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3276 to 2991. [2021-08-06 19:48:35,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2991 states, 2990 states have (on average 2.173244147157191) internal successors, (6498), 2990 states have internal predecessors, (6498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:35,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2991 states to 2991 states and 6498 transitions. [2021-08-06 19:48:35,918 INFO L78 Accepts]: Start accepts. Automaton has 2991 states and 6498 transitions. Word has length 48 [2021-08-06 19:48:35,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:35,919 INFO L470 AbstractCegarLoop]: Abstraction has 2991 states and 6498 transitions. [2021-08-06 19:48:35,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:35,919 INFO L276 IsEmpty]: Start isEmpty. Operand 2991 states and 6498 transitions. [2021-08-06 19:48:35,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:48:35,925 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:35,925 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:35,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-06 19:48:35,925 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:35,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:35,926 INFO L82 PathProgramCache]: Analyzing trace with hash -570694530, now seen corresponding path program 8 times [2021-08-06 19:48:35,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:35,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793310088] [2021-08-06 19:48:35,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:35,926 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:35,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:35,982 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 78.8 percent of original size [2021-08-06 19:48:35,986 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 78.8 percent of original size [2021-08-06 19:48:36,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:48:36,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:36,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793310088] [2021-08-06 19:48:36,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793310088] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:48:36,125 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:48:36,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-08-06 19:48:36,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417240894] [2021-08-06 19:48:36,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:48:36,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:36,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:48:36,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:48:36,126 INFO L87 Difference]: Start difference. First operand 2991 states and 6498 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:36,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:36,474 INFO L93 Difference]: Finished difference Result 3276 states and 7058 transitions. [2021-08-06 19:48:36,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:48:36,475 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 19:48:36,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:36,482 INFO L225 Difference]: With dead ends: 3276 [2021-08-06 19:48:36,482 INFO L226 Difference]: Without dead ends: 3198 [2021-08-06 19:48:36,483 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 170.3ms TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:48:36,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3198 states. [2021-08-06 19:48:36,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3198 to 3022. [2021-08-06 19:48:36,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3022 states, 3021 states have (on average 2.1694803045349222) internal successors, (6554), 3021 states have internal predecessors, (6554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:36,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3022 states to 3022 states and 6554 transitions. [2021-08-06 19:48:36,559 INFO L78 Accepts]: Start accepts. Automaton has 3022 states and 6554 transitions. Word has length 48 [2021-08-06 19:48:36,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:36,560 INFO L470 AbstractCegarLoop]: Abstraction has 3022 states and 6554 transitions. [2021-08-06 19:48:36,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:36,560 INFO L276 IsEmpty]: Start isEmpty. Operand 3022 states and 6554 transitions. [2021-08-06 19:48:36,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:48:36,566 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:36,566 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:36,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-06 19:48:36,566 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:36,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:36,567 INFO L82 PathProgramCache]: Analyzing trace with hash 400627456, now seen corresponding path program 9 times [2021-08-06 19:48:36,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:36,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753281801] [2021-08-06 19:48:36,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:36,567 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:36,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:36,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:48:36,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:36,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753281801] [2021-08-06 19:48:36,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753281801] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:48:36,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:48:36,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 19:48:36,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798226523] [2021-08-06 19:48:36,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 19:48:36,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:36,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 19:48:36,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:48:36,586 INFO L87 Difference]: Start difference. First operand 3022 states and 6554 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:36,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:36,601 INFO L93 Difference]: Finished difference Result 2976 states and 6298 transitions. [2021-08-06 19:48:36,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 19:48:36,601 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 19:48:36,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:36,607 INFO L225 Difference]: With dead ends: 2976 [2021-08-06 19:48:36,607 INFO L226 Difference]: Without dead ends: 2976 [2021-08-06 19:48:36,607 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:48:36,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2976 states. [2021-08-06 19:48:36,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2976 to 2976. [2021-08-06 19:48:36,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2976 states, 2975 states have (on average 2.1169747899159663) internal successors, (6298), 2975 states have internal predecessors, (6298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:36,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2976 states to 2976 states and 6298 transitions. [2021-08-06 19:48:36,665 INFO L78 Accepts]: Start accepts. Automaton has 2976 states and 6298 transitions. Word has length 48 [2021-08-06 19:48:36,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:36,666 INFO L470 AbstractCegarLoop]: Abstraction has 2976 states and 6298 transitions. [2021-08-06 19:48:36,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:36,666 INFO L276 IsEmpty]: Start isEmpty. Operand 2976 states and 6298 transitions. [2021-08-06 19:48:36,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:48:36,672 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:36,672 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:36,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-06 19:48:36,672 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:36,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:36,673 INFO L82 PathProgramCache]: Analyzing trace with hash 789240680, now seen corresponding path program 10 times [2021-08-06 19:48:36,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:36,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772806769] [2021-08-06 19:48:36,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:36,673 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:36,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:36,754 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 19:48:36,756 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 19:48:36,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:48:36,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:36,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772806769] [2021-08-06 19:48:36,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772806769] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:48:36,771 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:48:36,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-06 19:48:36,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32003512] [2021-08-06 19:48:36,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:48:36,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:36,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:48:36,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:48:36,772 INFO L87 Difference]: Start difference. First operand 2976 states and 6298 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:36,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:36,939 INFO L93 Difference]: Finished difference Result 3442 states and 7200 transitions. [2021-08-06 19:48:36,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:48:36,939 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 19:48:36,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:36,946 INFO L225 Difference]: With dead ends: 3442 [2021-08-06 19:48:36,947 INFO L226 Difference]: Without dead ends: 3298 [2021-08-06 19:48:36,947 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 128.7ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:48:36,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3298 states. [2021-08-06 19:48:37,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3298 to 2946. [2021-08-06 19:48:37,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2946 states, 2945 states have (on average 2.1157894736842104) internal successors, (6231), 2945 states have internal predecessors, (6231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:37,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2946 states to 2946 states and 6231 transitions. [2021-08-06 19:48:37,017 INFO L78 Accepts]: Start accepts. Automaton has 2946 states and 6231 transitions. Word has length 48 [2021-08-06 19:48:37,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:37,017 INFO L470 AbstractCegarLoop]: Abstraction has 2946 states and 6231 transitions. [2021-08-06 19:48:37,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:37,018 INFO L276 IsEmpty]: Start isEmpty. Operand 2946 states and 6231 transitions. [2021-08-06 19:48:37,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:48:37,024 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:37,024 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:37,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-06 19:48:37,024 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:37,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:37,025 INFO L82 PathProgramCache]: Analyzing trace with hash 230841960, now seen corresponding path program 11 times [2021-08-06 19:48:37,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:37,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887539141] [2021-08-06 19:48:37,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:37,025 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:37,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:37,097 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 72.2 percent of original size [2021-08-06 19:48:37,101 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 72.2 percent of original size [2021-08-06 19:48:37,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:48:37,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:37,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887539141] [2021-08-06 19:48:37,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887539141] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:48:37,247 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:48:37,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-06 19:48:37,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009204566] [2021-08-06 19:48:37,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:48:37,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:37,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:48:37,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:48:37,250 INFO L87 Difference]: Start difference. First operand 2946 states and 6231 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:37,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:37,509 INFO L93 Difference]: Finished difference Result 3481 states and 7409 transitions. [2021-08-06 19:48:37,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 19:48:37,510 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 19:48:37,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:37,517 INFO L225 Difference]: With dead ends: 3481 [2021-08-06 19:48:37,517 INFO L226 Difference]: Without dead ends: 3386 [2021-08-06 19:48:37,518 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 106.2ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:48:37,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3386 states. [2021-08-06 19:48:37,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3386 to 3360. [2021-08-06 19:48:37,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3360 states, 3359 states have (on average 2.1384340577552843) internal successors, (7183), 3359 states have internal predecessors, (7183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:37,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3360 states to 3360 states and 7183 transitions. [2021-08-06 19:48:37,576 INFO L78 Accepts]: Start accepts. Automaton has 3360 states and 7183 transitions. Word has length 48 [2021-08-06 19:48:37,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:37,576 INFO L470 AbstractCegarLoop]: Abstraction has 3360 states and 7183 transitions. [2021-08-06 19:48:37,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:37,576 INFO L276 IsEmpty]: Start isEmpty. Operand 3360 states and 7183 transitions. [2021-08-06 19:48:37,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:48:37,584 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:37,584 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:37,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-06 19:48:37,584 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:37,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:37,585 INFO L82 PathProgramCache]: Analyzing trace with hash 683261554, now seen corresponding path program 12 times [2021-08-06 19:48:37,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:37,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454886762] [2021-08-06 19:48:37,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:37,585 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:37,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:37,665 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 78.8 percent of original size [2021-08-06 19:48:37,669 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 78.8 percent of original size [2021-08-06 19:48:37,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:48:37,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:37,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454886762] [2021-08-06 19:48:37,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454886762] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:48:37,798 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:48:37,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-08-06 19:48:37,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84690621] [2021-08-06 19:48:37,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:48:37,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:37,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:48:37,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:48:37,799 INFO L87 Difference]: Start difference. First operand 3360 states and 7183 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:38,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:38,066 INFO L93 Difference]: Finished difference Result 3380 states and 7223 transitions. [2021-08-06 19:48:38,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:48:38,066 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 19:48:38,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:38,072 INFO L225 Difference]: With dead ends: 3380 [2021-08-06 19:48:38,072 INFO L226 Difference]: Without dead ends: 3142 [2021-08-06 19:48:38,072 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 147.4ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:48:38,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3142 states. [2021-08-06 19:48:38,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3142 to 3130. [2021-08-06 19:48:38,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3130 states, 3129 states have (on average 2.1431767337807606) internal successors, (6706), 3129 states have internal predecessors, (6706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:38,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3130 states to 3130 states and 6706 transitions. [2021-08-06 19:48:38,124 INFO L78 Accepts]: Start accepts. Automaton has 3130 states and 6706 transitions. Word has length 48 [2021-08-06 19:48:38,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:38,125 INFO L470 AbstractCegarLoop]: Abstraction has 3130 states and 6706 transitions. [2021-08-06 19:48:38,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:38,125 INFO L276 IsEmpty]: Start isEmpty. Operand 3130 states and 6706 transitions. [2021-08-06 19:48:38,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:48:38,132 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:38,132 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:38,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-06 19:48:38,132 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:38,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:38,133 INFO L82 PathProgramCache]: Analyzing trace with hash 799009298, now seen corresponding path program 13 times [2021-08-06 19:48:38,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:38,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789590962] [2021-08-06 19:48:38,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:38,133 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:38,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:38,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:48:38,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:38,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789590962] [2021-08-06 19:48:38,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789590962] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:48:38,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:48:38,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 19:48:38,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591232194] [2021-08-06 19:48:38,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:48:38,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:38,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:48:38,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:48:38,243 INFO L87 Difference]: Start difference. First operand 3130 states and 6706 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:38,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:38,444 INFO L93 Difference]: Finished difference Result 4973 states and 10851 transitions. [2021-08-06 19:48:38,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:48:38,444 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 19:48:38,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:38,453 INFO L225 Difference]: With dead ends: 4973 [2021-08-06 19:48:38,453 INFO L226 Difference]: Without dead ends: 4866 [2021-08-06 19:48:38,454 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 68.6ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:48:38,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4866 states. [2021-08-06 19:48:38,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4866 to 3486. [2021-08-06 19:48:38,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3486 states, 3485 states have (on average 2.157245337159254) internal successors, (7518), 3485 states have internal predecessors, (7518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:38,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3486 states to 3486 states and 7518 transitions. [2021-08-06 19:48:38,525 INFO L78 Accepts]: Start accepts. Automaton has 3486 states and 7518 transitions. Word has length 48 [2021-08-06 19:48:38,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:38,525 INFO L470 AbstractCegarLoop]: Abstraction has 3486 states and 7518 transitions. [2021-08-06 19:48:38,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:38,525 INFO L276 IsEmpty]: Start isEmpty. Operand 3486 states and 7518 transitions. [2021-08-06 19:48:38,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:48:38,532 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:38,532 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:38,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-06 19:48:38,532 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:38,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:38,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1575495156, now seen corresponding path program 14 times [2021-08-06 19:48:38,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:38,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334774745] [2021-08-06 19:48:38,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:38,533 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:38,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:38,632 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 47.4 percent of original size [2021-08-06 19:48:38,659 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 47.4 percent of original size [2021-08-06 19:48:38,690 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 79.2 percent of original size [2021-08-06 19:48:38,694 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 79.2 percent of original size [2021-08-06 19:48:38,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:48:38,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:38,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334774745] [2021-08-06 19:48:38,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334774745] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:48:38,765 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:48:38,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-06 19:48:38,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256964779] [2021-08-06 19:48:38,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:48:38,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:38,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:48:38,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:48:38,766 INFO L87 Difference]: Start difference. First operand 3486 states and 7518 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:38,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:38,987 INFO L93 Difference]: Finished difference Result 5376 states and 11685 transitions. [2021-08-06 19:48:38,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:48:38,988 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 19:48:38,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:38,997 INFO L225 Difference]: With dead ends: 5376 [2021-08-06 19:48:38,998 INFO L226 Difference]: Without dead ends: 5226 [2021-08-06 19:48:38,999 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 111.6ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:48:39,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5226 states. [2021-08-06 19:48:39,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5226 to 4040. [2021-08-06 19:48:39,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4040 states, 4039 states have (on average 2.166377816291161) internal successors, (8750), 4039 states have internal predecessors, (8750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:39,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4040 states to 4040 states and 8750 transitions. [2021-08-06 19:48:39,078 INFO L78 Accepts]: Start accepts. Automaton has 4040 states and 8750 transitions. Word has length 48 [2021-08-06 19:48:39,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:39,078 INFO L470 AbstractCegarLoop]: Abstraction has 4040 states and 8750 transitions. [2021-08-06 19:48:39,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:39,079 INFO L276 IsEmpty]: Start isEmpty. Operand 4040 states and 8750 transitions. [2021-08-06 19:48:39,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:48:39,090 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:39,090 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:39,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-06 19:48:39,090 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:39,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:39,091 INFO L82 PathProgramCache]: Analyzing trace with hash -127305544, now seen corresponding path program 15 times [2021-08-06 19:48:39,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:39,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506187990] [2021-08-06 19:48:39,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:39,091 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:39,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:39,176 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 58.1 percent of original size [2021-08-06 19:48:39,179 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 58.1 percent of original size [2021-08-06 19:48:39,203 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 78.9 percent of original size [2021-08-06 19:48:39,206 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 78.9 percent of original size [2021-08-06 19:48:39,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:48:39,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:39,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506187990] [2021-08-06 19:48:39,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506187990] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:48:39,260 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:48:39,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-06 19:48:39,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75378547] [2021-08-06 19:48:39,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:48:39,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:39,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:48:39,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:48:39,261 INFO L87 Difference]: Start difference. First operand 4040 states and 8750 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:39,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:39,479 INFO L93 Difference]: Finished difference Result 4819 states and 10450 transitions. [2021-08-06 19:48:39,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:48:39,479 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 19:48:39,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:39,488 INFO L225 Difference]: With dead ends: 4819 [2021-08-06 19:48:39,488 INFO L226 Difference]: Without dead ends: 4710 [2021-08-06 19:48:39,490 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 95.0ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:48:39,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4710 states. [2021-08-06 19:48:39,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4710 to 4001. [2021-08-06 19:48:39,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4001 states, 4000 states have (on average 2.165) internal successors, (8660), 4000 states have internal predecessors, (8660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:39,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4001 states to 4001 states and 8660 transitions. [2021-08-06 19:48:39,581 INFO L78 Accepts]: Start accepts. Automaton has 4001 states and 8660 transitions. Word has length 48 [2021-08-06 19:48:39,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:39,581 INFO L470 AbstractCegarLoop]: Abstraction has 4001 states and 8660 transitions. [2021-08-06 19:48:39,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:39,582 INFO L276 IsEmpty]: Start isEmpty. Operand 4001 states and 8660 transitions. [2021-08-06 19:48:39,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:48:39,588 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:39,589 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:39,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-08-06 19:48:39,589 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:39,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:39,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1993812352, now seen corresponding path program 16 times [2021-08-06 19:48:39,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:39,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739839779] [2021-08-06 19:48:39,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:39,590 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:39,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:39,691 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 47.4 percent of original size [2021-08-06 19:48:39,695 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 47.4 percent of original size [2021-08-06 19:48:39,723 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 79.2 percent of original size [2021-08-06 19:48:39,725 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 79.2 percent of original size [2021-08-06 19:48:39,747 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 79.2 percent of original size [2021-08-06 19:48:39,749 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 79.2 percent of original size [2021-08-06 19:48:39,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:48:39,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:39,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739839779] [2021-08-06 19:48:39,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739839779] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:48:39,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:48:39,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-06 19:48:39,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870653541] [2021-08-06 19:48:39,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:48:39,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:39,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:48:39,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:48:39,803 INFO L87 Difference]: Start difference. First operand 4001 states and 8660 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:39,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:39,995 INFO L93 Difference]: Finished difference Result 4753 states and 10282 transitions. [2021-08-06 19:48:39,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:48:39,996 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 19:48:39,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:40,004 INFO L225 Difference]: With dead ends: 4753 [2021-08-06 19:48:40,005 INFO L226 Difference]: Without dead ends: 4627 [2021-08-06 19:48:40,005 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 106.4ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:48:40,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4627 states. [2021-08-06 19:48:40,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4627 to 3921. [2021-08-06 19:48:40,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3921 states, 3920 states have (on average 2.150765306122449) internal successors, (8431), 3920 states have internal predecessors, (8431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:40,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3921 states to 3921 states and 8431 transitions. [2021-08-06 19:48:40,080 INFO L78 Accepts]: Start accepts. Automaton has 3921 states and 8431 transitions. Word has length 48 [2021-08-06 19:48:40,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:40,080 INFO L470 AbstractCegarLoop]: Abstraction has 3921 states and 8431 transitions. [2021-08-06 19:48:40,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:40,081 INFO L276 IsEmpty]: Start isEmpty. Operand 3921 states and 8431 transitions. [2021-08-06 19:48:40,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:48:40,088 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:40,088 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:40,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-08-06 19:48:40,088 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:40,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:40,089 INFO L82 PathProgramCache]: Analyzing trace with hash 598354244, now seen corresponding path program 17 times [2021-08-06 19:48:40,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:40,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132224441] [2021-08-06 19:48:40,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:40,089 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:40,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:40,167 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 58.1 percent of original size [2021-08-06 19:48:40,170 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 58.1 percent of original size [2021-08-06 19:48:40,197 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 78.9 percent of original size [2021-08-06 19:48:40,200 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 78.9 percent of original size [2021-08-06 19:48:40,214 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 78.9 percent of original size [2021-08-06 19:48:40,217 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 78.9 percent of original size [2021-08-06 19:48:40,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:48:40,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:40,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132224441] [2021-08-06 19:48:40,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132224441] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:48:40,260 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:48:40,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-06 19:48:40,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276303339] [2021-08-06 19:48:40,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:48:40,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:40,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:48:40,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:48:40,262 INFO L87 Difference]: Start difference. First operand 3921 states and 8431 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:40,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:40,482 INFO L93 Difference]: Finished difference Result 4488 states and 9505 transitions. [2021-08-06 19:48:40,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:48:40,482 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 19:48:40,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:40,488 INFO L225 Difference]: With dead ends: 4488 [2021-08-06 19:48:40,488 INFO L226 Difference]: Without dead ends: 4125 [2021-08-06 19:48:40,488 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 91.6ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:48:40,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4125 states. [2021-08-06 19:48:40,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4125 to 3151. [2021-08-06 19:48:40,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3151 states, 3150 states have (on average 2.1142857142857143) internal successors, (6660), 3150 states have internal predecessors, (6660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:40,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3151 states to 3151 states and 6660 transitions. [2021-08-06 19:48:40,542 INFO L78 Accepts]: Start accepts. Automaton has 3151 states and 6660 transitions. Word has length 48 [2021-08-06 19:48:40,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:40,543 INFO L470 AbstractCegarLoop]: Abstraction has 3151 states and 6660 transitions. [2021-08-06 19:48:40,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:40,543 INFO L276 IsEmpty]: Start isEmpty. Operand 3151 states and 6660 transitions. [2021-08-06 19:48:40,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:48:40,548 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:40,548 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:40,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-08-06 19:48:40,549 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:40,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:40,549 INFO L82 PathProgramCache]: Analyzing trace with hash -480313778, now seen corresponding path program 18 times [2021-08-06 19:48:40,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:40,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842495145] [2021-08-06 19:48:40,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:40,550 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:40,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:40,573 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 54.8 percent of original size [2021-08-06 19:48:40,576 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 54.8 percent of original size [2021-08-06 19:48:40,594 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 76.9 percent of original size [2021-08-06 19:48:40,595 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 76.9 percent of original size [2021-08-06 19:48:40,618 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 40.9 percent of original size [2021-08-06 19:48:40,619 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 40.9 percent of original size [2021-08-06 19:48:40,623 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 19:48:40,624 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 19:48:40,634 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 57.9 percent of original size [2021-08-06 19:48:40,637 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 57.9 percent of original size [2021-08-06 19:48:40,653 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 71.8 percent of original size [2021-08-06 19:48:40,656 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 71.8 percent of original size [2021-08-06 19:48:40,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:48:40,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:40,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842495145] [2021-08-06 19:48:40,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842495145] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:48:40,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:48:40,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-06 19:48:40,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621610605] [2021-08-06 19:48:40,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 19:48:40,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:40,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 19:48:40,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:48:40,676 INFO L87 Difference]: Start difference. First operand 3151 states and 6660 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:40,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:40,795 INFO L93 Difference]: Finished difference Result 3720 states and 7709 transitions. [2021-08-06 19:48:40,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 19:48:40,796 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 19:48:40,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:40,800 INFO L225 Difference]: With dead ends: 3720 [2021-08-06 19:48:40,800 INFO L226 Difference]: Without dead ends: 3482 [2021-08-06 19:48:40,801 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 33.9ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:48:40,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3482 states. [2021-08-06 19:48:40,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3482 to 3280. [2021-08-06 19:48:40,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3280 states, 3279 states have (on average 2.1027752363525467) internal successors, (6895), 3279 states have internal predecessors, (6895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:40,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3280 states to 3280 states and 6895 transitions. [2021-08-06 19:48:40,859 INFO L78 Accepts]: Start accepts. Automaton has 3280 states and 6895 transitions. Word has length 48 [2021-08-06 19:48:40,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:40,860 INFO L470 AbstractCegarLoop]: Abstraction has 3280 states and 6895 transitions. [2021-08-06 19:48:40,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:40,860 INFO L276 IsEmpty]: Start isEmpty. Operand 3280 states and 6895 transitions. [2021-08-06 19:48:40,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:48:40,865 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:40,866 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:40,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-08-06 19:48:40,866 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:40,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:40,867 INFO L82 PathProgramCache]: Analyzing trace with hash 729581056, now seen corresponding path program 19 times [2021-08-06 19:48:40,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:40,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254477799] [2021-08-06 19:48:40,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:40,867 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:40,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:40,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:48:40,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:40,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254477799] [2021-08-06 19:48:40,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254477799] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:48:40,986 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:48:40,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 19:48:40,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553437971] [2021-08-06 19:48:40,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:48:40,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:40,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:48:40,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:48:40,988 INFO L87 Difference]: Start difference. First operand 3280 states and 6895 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:41,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:41,208 INFO L93 Difference]: Finished difference Result 4813 states and 10070 transitions. [2021-08-06 19:48:41,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 19:48:41,208 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 19:48:41,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:41,214 INFO L225 Difference]: With dead ends: 4813 [2021-08-06 19:48:41,214 INFO L226 Difference]: Without dead ends: 4658 [2021-08-06 19:48:41,214 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 87.6ms TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:48:41,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4658 states. [2021-08-06 19:48:41,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4658 to 3327. [2021-08-06 19:48:41,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3327 states, 3326 states have (on average 2.097113650030066) internal successors, (6975), 3326 states have internal predecessors, (6975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:41,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3327 states to 3327 states and 6975 transitions. [2021-08-06 19:48:41,269 INFO L78 Accepts]: Start accepts. Automaton has 3327 states and 6975 transitions. Word has length 48 [2021-08-06 19:48:41,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:41,269 INFO L470 AbstractCegarLoop]: Abstraction has 3327 states and 6975 transitions. [2021-08-06 19:48:41,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:41,269 INFO L276 IsEmpty]: Start isEmpty. Operand 3327 states and 6975 transitions. [2021-08-06 19:48:41,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:48:41,274 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:41,274 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:41,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-08-06 19:48:41,275 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:41,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:41,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1874489826, now seen corresponding path program 20 times [2021-08-06 19:48:41,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:41,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978081435] [2021-08-06 19:48:41,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:41,275 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:41,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:41,300 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 54.8 percent of original size [2021-08-06 19:48:41,303 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 54.8 percent of original size [2021-08-06 19:48:41,321 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 76.9 percent of original size [2021-08-06 19:48:41,322 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 76.9 percent of original size [2021-08-06 19:48:41,372 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 81.5 percent of original size [2021-08-06 19:48:41,375 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 81.5 percent of original size [2021-08-06 19:48:41,400 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 82.1 percent of original size [2021-08-06 19:48:41,403 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 82.1 percent of original size [2021-08-06 19:48:41,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:48:41,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:41,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978081435] [2021-08-06 19:48:41,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978081435] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:48:41,489 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:48:41,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-06 19:48:41,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170338551] [2021-08-06 19:48:41,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:48:41,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:41,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:48:41,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:48:41,490 INFO L87 Difference]: Start difference. First operand 3327 states and 6975 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:41,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:41,881 INFO L93 Difference]: Finished difference Result 4259 states and 8823 transitions. [2021-08-06 19:48:41,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:48:41,882 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 19:48:41,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:41,885 INFO L225 Difference]: With dead ends: 4259 [2021-08-06 19:48:41,886 INFO L226 Difference]: Without dead ends: 3918 [2021-08-06 19:48:41,886 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 216.8ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:48:41,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3918 states. [2021-08-06 19:48:41,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3918 to 3051. [2021-08-06 19:48:41,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3051 states, 3050 states have (on average 2.1104918032786886) internal successors, (6437), 3050 states have internal predecessors, (6437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:41,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3051 states to 3051 states and 6437 transitions. [2021-08-06 19:48:41,936 INFO L78 Accepts]: Start accepts. Automaton has 3051 states and 6437 transitions. Word has length 48 [2021-08-06 19:48:41,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:41,937 INFO L470 AbstractCegarLoop]: Abstraction has 3051 states and 6437 transitions. [2021-08-06 19:48:41,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:41,937 INFO L276 IsEmpty]: Start isEmpty. Operand 3051 states and 6437 transitions. [2021-08-06 19:48:41,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:48:41,941 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:41,941 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:41,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-08-06 19:48:41,941 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:41,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:41,941 INFO L82 PathProgramCache]: Analyzing trace with hash 101469698, now seen corresponding path program 21 times [2021-08-06 19:48:41,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:41,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445252052] [2021-08-06 19:48:41,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:41,942 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:41,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:41,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:48:41,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:41,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445252052] [2021-08-06 19:48:41,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445252052] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:48:41,956 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:48:41,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 19:48:41,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106398959] [2021-08-06 19:48:41,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 19:48:41,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:41,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 19:48:41,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:48:41,957 INFO L87 Difference]: Start difference. First operand 3051 states and 6437 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:41,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:41,970 INFO L93 Difference]: Finished difference Result 2960 states and 6096 transitions. [2021-08-06 19:48:41,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 19:48:41,970 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 19:48:41,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:41,987 INFO L225 Difference]: With dead ends: 2960 [2021-08-06 19:48:41,987 INFO L226 Difference]: Without dead ends: 2955 [2021-08-06 19:48:41,987 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:48:41,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2955 states. [2021-08-06 19:48:42,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2955 to 2955. [2021-08-06 19:48:42,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2955 states, 2954 states have (on average 2.0619498984427893) internal successors, (6091), 2954 states have internal predecessors, (6091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:42,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2955 states to 2955 states and 6091 transitions. [2021-08-06 19:48:42,035 INFO L78 Accepts]: Start accepts. Automaton has 2955 states and 6091 transitions. Word has length 48 [2021-08-06 19:48:42,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:42,035 INFO L470 AbstractCegarLoop]: Abstraction has 2955 states and 6091 transitions. [2021-08-06 19:48:42,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:42,035 INFO L276 IsEmpty]: Start isEmpty. Operand 2955 states and 6091 transitions. [2021-08-06 19:48:42,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:48:42,039 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:42,039 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:42,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-08-06 19:48:42,039 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:42,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:42,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1035303966, now seen corresponding path program 22 times [2021-08-06 19:48:42,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:42,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464920046] [2021-08-06 19:48:42,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:42,040 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:42,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:42,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:48:42,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:42,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464920046] [2021-08-06 19:48:42,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464920046] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:48:42,207 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:48:42,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-06 19:48:42,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461936784] [2021-08-06 19:48:42,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:48:42,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:42,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:48:42,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:48:42,208 INFO L87 Difference]: Start difference. First operand 2955 states and 6091 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:42,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:42,549 INFO L93 Difference]: Finished difference Result 5590 states and 11465 transitions. [2021-08-06 19:48:42,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:48:42,550 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 19:48:42,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:42,556 INFO L225 Difference]: With dead ends: 5590 [2021-08-06 19:48:42,556 INFO L226 Difference]: Without dead ends: 5198 [2021-08-06 19:48:42,556 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 148.6ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:48:42,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5198 states. [2021-08-06 19:48:42,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5198 to 3031. [2021-08-06 19:48:42,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3031 states, 3030 states have (on average 2.067986798679868) internal successors, (6266), 3030 states have internal predecessors, (6266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:42,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3031 states to 3031 states and 6266 transitions. [2021-08-06 19:48:42,613 INFO L78 Accepts]: Start accepts. Automaton has 3031 states and 6266 transitions. Word has length 48 [2021-08-06 19:48:42,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:42,613 INFO L470 AbstractCegarLoop]: Abstraction has 3031 states and 6266 transitions. [2021-08-06 19:48:42,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:42,614 INFO L276 IsEmpty]: Start isEmpty. Operand 3031 states and 6266 transitions. [2021-08-06 19:48:42,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:48:42,618 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:42,618 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:42,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-08-06 19:48:42,618 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:42,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:42,619 INFO L82 PathProgramCache]: Analyzing trace with hash 415160800, now seen corresponding path program 23 times [2021-08-06 19:48:42,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:42,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463788770] [2021-08-06 19:48:42,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:42,619 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:42,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:42,678 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 69.2 percent of original size [2021-08-06 19:48:42,680 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 69.2 percent of original size [2021-08-06 19:48:42,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:48:42,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:42,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463788770] [2021-08-06 19:48:42,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463788770] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:48:42,728 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:48:42,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-06 19:48:42,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85351391] [2021-08-06 19:48:42,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:48:42,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:42,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:48:42,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:48:42,730 INFO L87 Difference]: Start difference. First operand 3031 states and 6266 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:43,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:43,300 INFO L93 Difference]: Finished difference Result 6113 states and 12864 transitions. [2021-08-06 19:48:43,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 19:48:43,300 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 19:48:43,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:43,308 INFO L225 Difference]: With dead ends: 6113 [2021-08-06 19:48:43,308 INFO L226 Difference]: Without dead ends: 6113 [2021-08-06 19:48:43,308 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 256.6ms TimeCoverageRelationStatistics Valid=150, Invalid=312, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:48:43,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6113 states. [2021-08-06 19:48:43,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6113 to 3104. [2021-08-06 19:48:43,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3104 states, 3103 states have (on average 2.0592974540767) internal successors, (6390), 3103 states have internal predecessors, (6390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:43,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3104 states to 3104 states and 6390 transitions. [2021-08-06 19:48:43,365 INFO L78 Accepts]: Start accepts. Automaton has 3104 states and 6390 transitions. Word has length 48 [2021-08-06 19:48:43,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:43,365 INFO L470 AbstractCegarLoop]: Abstraction has 3104 states and 6390 transitions. [2021-08-06 19:48:43,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:43,365 INFO L276 IsEmpty]: Start isEmpty. Operand 3104 states and 6390 transitions. [2021-08-06 19:48:43,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:48:43,369 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:43,369 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:43,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-08-06 19:48:43,370 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:43,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:43,370 INFO L82 PathProgramCache]: Analyzing trace with hash -300122534, now seen corresponding path program 24 times [2021-08-06 19:48:43,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:43,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880775598] [2021-08-06 19:48:43,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:43,371 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:43,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:43,446 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 19:48:43,447 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 19:48:43,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:48:43,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:43,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880775598] [2021-08-06 19:48:43,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880775598] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:48:43,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:48:43,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-06 19:48:43,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645493622] [2021-08-06 19:48:43,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:48:43,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:43,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:48:43,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:48:43,463 INFO L87 Difference]: Start difference. First operand 3104 states and 6390 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:43,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:43,630 INFO L93 Difference]: Finished difference Result 3482 states and 7122 transitions. [2021-08-06 19:48:43,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:48:43,630 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 19:48:43,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:43,637 INFO L225 Difference]: With dead ends: 3482 [2021-08-06 19:48:43,637 INFO L226 Difference]: Without dead ends: 3383 [2021-08-06 19:48:43,637 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 131.6ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:48:43,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3383 states. [2021-08-06 19:48:43,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3383 to 3081. [2021-08-06 19:48:43,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3081 states, 3080 states have (on average 2.0594155844155844) internal successors, (6343), 3080 states have internal predecessors, (6343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:43,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3081 states to 3081 states and 6343 transitions. [2021-08-06 19:48:43,679 INFO L78 Accepts]: Start accepts. Automaton has 3081 states and 6343 transitions. Word has length 48 [2021-08-06 19:48:43,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:43,679 INFO L470 AbstractCegarLoop]: Abstraction has 3081 states and 6343 transitions. [2021-08-06 19:48:43,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:43,679 INFO L276 IsEmpty]: Start isEmpty. Operand 3081 states and 6343 transitions. [2021-08-06 19:48:43,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:48:43,683 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:43,684 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:43,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-08-06 19:48:43,684 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:43,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:43,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1054521086, now seen corresponding path program 25 times [2021-08-06 19:48:43,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:43,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889408411] [2021-08-06 19:48:43,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:43,685 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:43,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:43,785 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 19:48:43,787 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 19:48:43,790 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 19:48:43,791 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 19:48:43,804 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 19:48:43,805 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 19:48:43,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:48:43,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:43,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889408411] [2021-08-06 19:48:43,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889408411] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:48:43,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:48:43,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-06 19:48:43,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670174686] [2021-08-06 19:48:43,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:48:43,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:43,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:48:43,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:48:43,820 INFO L87 Difference]: Start difference. First operand 3081 states and 6343 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:44,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:44,035 INFO L93 Difference]: Finished difference Result 3549 states and 7178 transitions. [2021-08-06 19:48:44,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:48:44,035 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 19:48:44,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:44,039 INFO L225 Difference]: With dead ends: 3549 [2021-08-06 19:48:44,062 INFO L226 Difference]: Without dead ends: 3472 [2021-08-06 19:48:44,062 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 67.1ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:48:44,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3472 states. [2021-08-06 19:48:44,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3472 to 3020. [2021-08-06 19:48:44,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3020 states, 3019 states have (on average 2.057634978469692) internal successors, (6212), 3019 states have internal predecessors, (6212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:44,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3020 states to 3020 states and 6212 transitions. [2021-08-06 19:48:44,090 INFO L78 Accepts]: Start accepts. Automaton has 3020 states and 6212 transitions. Word has length 48 [2021-08-06 19:48:44,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:44,090 INFO L470 AbstractCegarLoop]: Abstraction has 3020 states and 6212 transitions. [2021-08-06 19:48:44,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:44,090 INFO L276 IsEmpty]: Start isEmpty. Operand 3020 states and 6212 transitions. [2021-08-06 19:48:44,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:48:44,093 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:44,093 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:44,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-08-06 19:48:44,093 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:44,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:44,093 INFO L82 PathProgramCache]: Analyzing trace with hash 910838816, now seen corresponding path program 26 times [2021-08-06 19:48:44,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:44,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999589081] [2021-08-06 19:48:44,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:44,094 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:44,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:44,118 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 56.9 percent of original size [2021-08-06 19:48:44,121 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 56.9 percent of original size [2021-08-06 19:48:44,143 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 84.2 percent of original size [2021-08-06 19:48:44,145 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 84.2 percent of original size [2021-08-06 19:48:44,225 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 74.1 percent of original size [2021-08-06 19:48:44,227 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 74.1 percent of original size [2021-08-06 19:48:44,252 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 75.9 percent of original size [2021-08-06 19:48:44,254 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 75.9 percent of original size [2021-08-06 19:48:44,278 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 33.3 percent of original size [2021-08-06 19:48:44,279 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 33.3 percent of original size [2021-08-06 19:48:44,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:48:44,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:44,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999589081] [2021-08-06 19:48:44,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999589081] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:48:44,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:48:44,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-06 19:48:44,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133502967] [2021-08-06 19:48:44,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:48:44,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:44,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:48:44,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:48:44,296 INFO L87 Difference]: Start difference. First operand 3020 states and 6212 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:44,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:44,653 INFO L93 Difference]: Finished difference Result 4081 states and 8291 transitions. [2021-08-06 19:48:44,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:48:44,654 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 19:48:44,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:44,658 INFO L225 Difference]: With dead ends: 4081 [2021-08-06 19:48:44,658 INFO L226 Difference]: Without dead ends: 4031 [2021-08-06 19:48:44,658 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 166.7ms TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:48:44,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4031 states. [2021-08-06 19:48:44,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4031 to 3346. [2021-08-06 19:48:44,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3346 states, 3345 states have (on average 2.0568011958146486) internal successors, (6880), 3345 states have internal predecessors, (6880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:44,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3346 states to 3346 states and 6880 transitions. [2021-08-06 19:48:44,693 INFO L78 Accepts]: Start accepts. Automaton has 3346 states and 6880 transitions. Word has length 48 [2021-08-06 19:48:44,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:44,693 INFO L470 AbstractCegarLoop]: Abstraction has 3346 states and 6880 transitions. [2021-08-06 19:48:44,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:44,693 INFO L276 IsEmpty]: Start isEmpty. Operand 3346 states and 6880 transitions. [2021-08-06 19:48:44,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:48:44,697 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:44,697 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:44,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-08-06 19:48:44,697 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:44,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:44,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1287639536, now seen corresponding path program 27 times [2021-08-06 19:48:44,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:44,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634899975] [2021-08-06 19:48:44,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:44,698 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:44,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:44,741 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 69.4 percent of original size [2021-08-06 19:48:44,744 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 69.4 percent of original size [2021-08-06 19:48:44,779 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 19:48:44,780 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 19:48:44,790 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:48:44,791 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:48:44,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:48:44,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:44,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634899975] [2021-08-06 19:48:44,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634899975] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:48:44,795 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:48:44,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 19:48:44,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838233587] [2021-08-06 19:48:44,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 19:48:44,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:44,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 19:48:44,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-06 19:48:44,796 INFO L87 Difference]: Start difference. First operand 3346 states and 6880 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:44,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:44,894 INFO L93 Difference]: Finished difference Result 4354 states and 8914 transitions. [2021-08-06 19:48:44,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 19:48:44,894 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 19:48:44,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:44,900 INFO L225 Difference]: With dead ends: 4354 [2021-08-06 19:48:44,900 INFO L226 Difference]: Without dead ends: 4051 [2021-08-06 19:48:44,900 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 26.6ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-06 19:48:44,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4051 states. [2021-08-06 19:48:44,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4051 to 3670. [2021-08-06 19:48:44,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3670 states, 3669 states have (on average 2.0545107658762607) internal successors, (7538), 3669 states have internal predecessors, (7538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:44,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3670 states to 3670 states and 7538 transitions. [2021-08-06 19:48:44,981 INFO L78 Accepts]: Start accepts. Automaton has 3670 states and 7538 transitions. Word has length 48 [2021-08-06 19:48:44,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:44,982 INFO L470 AbstractCegarLoop]: Abstraction has 3670 states and 7538 transitions. [2021-08-06 19:48:44,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:44,982 INFO L276 IsEmpty]: Start isEmpty. Operand 3670 states and 7538 transitions. [2021-08-06 19:48:44,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:48:44,987 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:44,987 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:44,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-08-06 19:48:44,987 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:44,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:44,988 INFO L82 PathProgramCache]: Analyzing trace with hash 587718940, now seen corresponding path program 28 times [2021-08-06 19:48:44,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:44,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145629737] [2021-08-06 19:48:44,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:44,989 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:44,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:45,024 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 51.1 percent of original size [2021-08-06 19:48:45,027 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 51.1 percent of original size [2021-08-06 19:48:45,102 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 48.5 percent of original size [2021-08-06 19:48:45,104 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 48.5 percent of original size [2021-08-06 19:48:45,122 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 80.0 percent of original size [2021-08-06 19:48:45,124 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 80.0 percent of original size [2021-08-06 19:48:45,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:48:45,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:45,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145629737] [2021-08-06 19:48:45,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145629737] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:48:45,178 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:48:45,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-08-06 19:48:45,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519895278] [2021-08-06 19:48:45,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:48:45,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:45,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:48:45,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:48:45,179 INFO L87 Difference]: Start difference. First operand 3670 states and 7538 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:45,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:45,557 INFO L93 Difference]: Finished difference Result 6322 states and 12978 transitions. [2021-08-06 19:48:45,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:48:45,558 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 19:48:45,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:45,568 INFO L225 Difference]: With dead ends: 6322 [2021-08-06 19:48:45,568 INFO L226 Difference]: Without dead ends: 6075 [2021-08-06 19:48:45,568 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 156.6ms TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:48:45,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6075 states. [2021-08-06 19:48:45,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6075 to 3776. [2021-08-06 19:48:45,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3776 states, 3775 states have (on average 2.0508609271523177) internal successors, (7742), 3775 states have internal predecessors, (7742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:45,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3776 states to 3776 states and 7742 transitions. [2021-08-06 19:48:45,634 INFO L78 Accepts]: Start accepts. Automaton has 3776 states and 7742 transitions. Word has length 48 [2021-08-06 19:48:45,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:45,635 INFO L470 AbstractCegarLoop]: Abstraction has 3776 states and 7742 transitions. [2021-08-06 19:48:45,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:45,635 INFO L276 IsEmpty]: Start isEmpty. Operand 3776 states and 7742 transitions. [2021-08-06 19:48:45,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:48:45,641 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:45,641 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:45,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-08-06 19:48:45,641 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:45,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:45,642 INFO L82 PathProgramCache]: Analyzing trace with hash 26535510, now seen corresponding path program 29 times [2021-08-06 19:48:45,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:45,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239568312] [2021-08-06 19:48:45,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:45,642 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:45,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:45,712 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 19:48:45,713 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 19:48:45,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:48:45,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:45,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239568312] [2021-08-06 19:48:45,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239568312] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:48:45,727 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:48:45,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-06 19:48:45,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456637129] [2021-08-06 19:48:45,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:48:45,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:45,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:48:45,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:48:45,728 INFO L87 Difference]: Start difference. First operand 3776 states and 7742 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:45,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:45,886 INFO L93 Difference]: Finished difference Result 4200 states and 8577 transitions. [2021-08-06 19:48:45,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:48:45,887 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 19:48:45,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:45,893 INFO L225 Difference]: With dead ends: 4200 [2021-08-06 19:48:45,893 INFO L226 Difference]: Without dead ends: 3904 [2021-08-06 19:48:45,895 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 119.7ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:48:45,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3904 states. [2021-08-06 19:48:45,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3904 to 3646. [2021-08-06 19:48:45,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3646 states, 3645 states have (on average 2.03840877914952) internal successors, (7430), 3645 states have internal predecessors, (7430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:45,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3646 states to 3646 states and 7430 transitions. [2021-08-06 19:48:45,976 INFO L78 Accepts]: Start accepts. Automaton has 3646 states and 7430 transitions. Word has length 48 [2021-08-06 19:48:45,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:45,976 INFO L470 AbstractCegarLoop]: Abstraction has 3646 states and 7430 transitions. [2021-08-06 19:48:45,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:45,976 INFO L276 IsEmpty]: Start isEmpty. Operand 3646 states and 7430 transitions. [2021-08-06 19:48:45,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:48:45,981 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:45,981 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:45,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-08-06 19:48:45,982 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:45,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:45,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1516656390, now seen corresponding path program 30 times [2021-08-06 19:48:45,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:45,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457016168] [2021-08-06 19:48:45,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:45,982 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:45,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:46,022 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 54.2 percent of original size [2021-08-06 19:48:46,026 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 54.2 percent of original size [2021-08-06 19:48:46,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:48:46,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:46,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457016168] [2021-08-06 19:48:46,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457016168] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:48:46,219 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:48:46,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-06 19:48:46,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315059800] [2021-08-06 19:48:46,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:48:46,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:46,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:48:46,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:48:46,220 INFO L87 Difference]: Start difference. First operand 3646 states and 7430 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:46,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:46,502 INFO L93 Difference]: Finished difference Result 4796 states and 9533 transitions. [2021-08-06 19:48:46,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:48:46,502 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 19:48:46,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:46,507 INFO L225 Difference]: With dead ends: 4796 [2021-08-06 19:48:46,507 INFO L226 Difference]: Without dead ends: 4562 [2021-08-06 19:48:46,508 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 103.0ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:48:46,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4562 states. [2021-08-06 19:48:46,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4562 to 3589. [2021-08-06 19:48:46,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3589 states, 3588 states have (on average 2.027870680044593) internal successors, (7276), 3588 states have internal predecessors, (7276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:46,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3589 states to 3589 states and 7276 transitions. [2021-08-06 19:48:46,549 INFO L78 Accepts]: Start accepts. Automaton has 3589 states and 7276 transitions. Word has length 48 [2021-08-06 19:48:46,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:46,549 INFO L470 AbstractCegarLoop]: Abstraction has 3589 states and 7276 transitions. [2021-08-06 19:48:46,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:46,549 INFO L276 IsEmpty]: Start isEmpty. Operand 3589 states and 7276 transitions. [2021-08-06 19:48:46,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:48:46,553 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:46,553 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:46,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-08-06 19:48:46,553 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:46,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:46,553 INFO L82 PathProgramCache]: Analyzing trace with hash 6435590, now seen corresponding path program 31 times [2021-08-06 19:48:46,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:46,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166735418] [2021-08-06 19:48:46,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:46,554 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:46,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:46,598 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 65.1 percent of original size [2021-08-06 19:48:46,601 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 65.1 percent of original size [2021-08-06 19:48:46,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:48:46,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:46,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166735418] [2021-08-06 19:48:46,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166735418] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:48:46,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:48:46,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-06 19:48:46,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167250346] [2021-08-06 19:48:46,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:48:46,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:46,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:48:46,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:48:46,705 INFO L87 Difference]: Start difference. First operand 3589 states and 7276 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:47,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:47,147 INFO L93 Difference]: Finished difference Result 4385 states and 8598 transitions. [2021-08-06 19:48:47,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 19:48:47,147 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 19:48:47,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:47,154 INFO L225 Difference]: With dead ends: 4385 [2021-08-06 19:48:47,154 INFO L226 Difference]: Without dead ends: 4064 [2021-08-06 19:48:47,154 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 182.9ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:48:47,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4064 states. [2021-08-06 19:48:47,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4064 to 3273. [2021-08-06 19:48:47,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3273 states, 3272 states have (on average 2.0189486552567235) internal successors, (6606), 3272 states have internal predecessors, (6606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:47,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3273 states to 3273 states and 6606 transitions. [2021-08-06 19:48:47,226 INFO L78 Accepts]: Start accepts. Automaton has 3273 states and 6606 transitions. Word has length 48 [2021-08-06 19:48:47,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:47,226 INFO L470 AbstractCegarLoop]: Abstraction has 3273 states and 6606 transitions. [2021-08-06 19:48:47,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:47,227 INFO L276 IsEmpty]: Start isEmpty. Operand 3273 states and 6606 transitions. [2021-08-06 19:48:47,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:48:47,231 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:47,231 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:47,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-08-06 19:48:47,232 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:47,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:47,232 INFO L82 PathProgramCache]: Analyzing trace with hash -809236806, now seen corresponding path program 32 times [2021-08-06 19:48:47,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:47,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709439553] [2021-08-06 19:48:47,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:47,233 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:47,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:47,282 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 62.5 percent of original size [2021-08-06 19:48:47,286 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 62.5 percent of original size [2021-08-06 19:48:47,330 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 54.5 percent of original size [2021-08-06 19:48:47,332 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 54.5 percent of original size [2021-08-06 19:48:47,344 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:48:47,345 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:48:47,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:48:47,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:47,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709439553] [2021-08-06 19:48:47,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709439553] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:48:47,349 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:48:47,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 19:48:47,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991054551] [2021-08-06 19:48:47,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 19:48:47,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:47,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 19:48:47,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-06 19:48:47,350 INFO L87 Difference]: Start difference. First operand 3273 states and 6606 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:47,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:47,478 INFO L93 Difference]: Finished difference Result 4019 states and 8086 transitions. [2021-08-06 19:48:47,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 19:48:47,479 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 19:48:47,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:47,484 INFO L225 Difference]: With dead ends: 4019 [2021-08-06 19:48:47,484 INFO L226 Difference]: Without dead ends: 3453 [2021-08-06 19:48:47,485 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 44.7ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:48:47,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3453 states. [2021-08-06 19:48:47,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3453 to 3095. [2021-08-06 19:48:47,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3095 states, 3094 states have (on average 2.0190691661279896) internal successors, (6247), 3094 states have internal predecessors, (6247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:47,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3095 states to 3095 states and 6247 transitions. [2021-08-06 19:48:47,523 INFO L78 Accepts]: Start accepts. Automaton has 3095 states and 6247 transitions. Word has length 48 [2021-08-06 19:48:47,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:47,523 INFO L470 AbstractCegarLoop]: Abstraction has 3095 states and 6247 transitions. [2021-08-06 19:48:47,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:47,524 INFO L276 IsEmpty]: Start isEmpty. Operand 3095 states and 6247 transitions. [2021-08-06 19:48:47,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:48:47,528 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:47,528 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:47,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-08-06 19:48:47,528 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:47,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:47,528 INFO L82 PathProgramCache]: Analyzing trace with hash -339688286, now seen corresponding path program 33 times [2021-08-06 19:48:47,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:47,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992650704] [2021-08-06 19:48:47,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:47,529 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:47,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:47,616 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 84.2 percent of original size [2021-08-06 19:48:47,620 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 84.2 percent of original size [2021-08-06 19:48:47,648 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 81.8 percent of original size [2021-08-06 19:48:47,653 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 81.8 percent of original size [2021-08-06 19:48:47,682 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 63.2 percent of original size [2021-08-06 19:48:47,688 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 63.2 percent of original size [2021-08-06 19:48:47,719 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 54.7 percent of original size [2021-08-06 19:48:47,724 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 54.7 percent of original size [2021-08-06 19:48:47,749 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 38, result has 38.7 percent of original size [2021-08-06 19:48:47,752 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 38, result has 38.7 percent of original size [2021-08-06 19:48:47,771 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 5.3 percent of original size [2021-08-06 19:48:47,772 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 5.3 percent of original size [2021-08-06 19:48:47,774 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 31, result has 3.1 percent of original size [2021-08-06 19:48:47,774 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 31, result has 3.1 percent of original size [2021-08-06 19:48:47,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:48:47,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:47,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992650704] [2021-08-06 19:48:47,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992650704] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:48:47,778 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:48:47,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 19:48:47,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752330029] [2021-08-06 19:48:47,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:48:47,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:47,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:48:47,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:48:47,779 INFO L87 Difference]: Start difference. First operand 3095 states and 6247 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:47,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:47,999 INFO L93 Difference]: Finished difference Result 3309 states and 6656 transitions. [2021-08-06 19:48:47,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 19:48:47,999 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 19:48:48,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:48,003 INFO L225 Difference]: With dead ends: 3309 [2021-08-06 19:48:48,003 INFO L226 Difference]: Without dead ends: 3206 [2021-08-06 19:48:48,003 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 101.4ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:48:48,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3206 states. [2021-08-06 19:48:48,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3206 to 3045. [2021-08-06 19:48:48,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3045 states, 3044 states have (on average 2.0177398160315376) internal successors, (6142), 3044 states have internal predecessors, (6142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:48,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3045 states to 3045 states and 6142 transitions. [2021-08-06 19:48:48,029 INFO L78 Accepts]: Start accepts. Automaton has 3045 states and 6142 transitions. Word has length 48 [2021-08-06 19:48:48,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:48,029 INFO L470 AbstractCegarLoop]: Abstraction has 3045 states and 6142 transitions. [2021-08-06 19:48:48,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:48,029 INFO L276 IsEmpty]: Start isEmpty. Operand 3045 states and 6142 transitions. [2021-08-06 19:48:48,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:48:48,032 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:48,032 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:48,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-08-06 19:48:48,033 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:48,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:48,033 INFO L82 PathProgramCache]: Analyzing trace with hash -985311802, now seen corresponding path program 34 times [2021-08-06 19:48:48,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:48,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341860437] [2021-08-06 19:48:48,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:48,033 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:48,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:48,121 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 78.9 percent of original size [2021-08-06 19:48:48,123 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 78.9 percent of original size [2021-08-06 19:48:48,135 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 19:48:48,136 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 19:48:48,146 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 19:48:48,147 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 19:48:48,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:48:48,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:48,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341860437] [2021-08-06 19:48:48,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341860437] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:48:48,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:48:48,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 19:48:48,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230734950] [2021-08-06 19:48:48,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:48:48,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:48,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:48:48,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:48:48,161 INFO L87 Difference]: Start difference. First operand 3045 states and 6142 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:48,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:48,338 INFO L93 Difference]: Finished difference Result 3287 states and 6510 transitions. [2021-08-06 19:48:48,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:48:48,339 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 19:48:48,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:48,343 INFO L225 Difference]: With dead ends: 3287 [2021-08-06 19:48:48,343 INFO L226 Difference]: Without dead ends: 3189 [2021-08-06 19:48:48,343 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 56.8ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:48:48,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3189 states. [2021-08-06 19:48:48,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3189 to 2832. [2021-08-06 19:48:48,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2832 states, 2831 states have (on average 2.009184033910279) internal successors, (5688), 2831 states have internal predecessors, (5688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:48,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2832 states to 2832 states and 5688 transitions. [2021-08-06 19:48:48,378 INFO L78 Accepts]: Start accepts. Automaton has 2832 states and 5688 transitions. Word has length 48 [2021-08-06 19:48:48,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:48,379 INFO L470 AbstractCegarLoop]: Abstraction has 2832 states and 5688 transitions. [2021-08-06 19:48:48,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:48,379 INFO L276 IsEmpty]: Start isEmpty. Operand 2832 states and 5688 transitions. [2021-08-06 19:48:48,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:48:48,382 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:48,382 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:48,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-08-06 19:48:48,383 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:48,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:48,383 INFO L82 PathProgramCache]: Analyzing trace with hash 465152964, now seen corresponding path program 35 times [2021-08-06 19:48:48,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:48,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992333866] [2021-08-06 19:48:48,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:48,383 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:48,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:48,429 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 19:48:48,431 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 19:48:48,458 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 19:48:48,459 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 19:48:48,468 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 19:48:48,469 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 19:48:48,479 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 19:48:48,480 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 19:48:48,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:48:48,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:48,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992333866] [2021-08-06 19:48:48,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992333866] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:48:48,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:48:48,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-06 19:48:48,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632217619] [2021-08-06 19:48:48,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 19:48:48,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:48,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 19:48:48,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:48:48,494 INFO L87 Difference]: Start difference. First operand 2832 states and 5688 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:48,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:48,587 INFO L93 Difference]: Finished difference Result 2656 states and 5157 transitions. [2021-08-06 19:48:48,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 19:48:48,588 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 19:48:48,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:48,590 INFO L225 Difference]: With dead ends: 2656 [2021-08-06 19:48:48,590 INFO L226 Difference]: Without dead ends: 2140 [2021-08-06 19:48:48,590 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 28.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:48:48,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2140 states. [2021-08-06 19:48:48,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2140 to 1737. [2021-08-06 19:48:48,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1737 states, 1736 states have (on average 1.9855990783410138) internal successors, (3447), 1736 states have internal predecessors, (3447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:48,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1737 states to 1737 states and 3447 transitions. [2021-08-06 19:48:48,611 INFO L78 Accepts]: Start accepts. Automaton has 1737 states and 3447 transitions. Word has length 48 [2021-08-06 19:48:48,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:48,611 INFO L470 AbstractCegarLoop]: Abstraction has 1737 states and 3447 transitions. [2021-08-06 19:48:48,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:48,611 INFO L276 IsEmpty]: Start isEmpty. Operand 1737 states and 3447 transitions. [2021-08-06 19:48:48,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:48:48,613 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:48,613 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:48,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-08-06 19:48:48,614 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:48,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:48,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1607322462, now seen corresponding path program 36 times [2021-08-06 19:48:48,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:48,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602465987] [2021-08-06 19:48:48,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:48,614 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:48,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:48,678 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 73.7 percent of original size [2021-08-06 19:48:48,682 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 73.7 percent of original size [2021-08-06 19:48:48,712 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 79.1 percent of original size [2021-08-06 19:48:48,717 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 79.1 percent of original size [2021-08-06 19:48:48,744 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 26, result has 39.5 percent of original size [2021-08-06 19:48:48,747 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 26, result has 39.5 percent of original size [2021-08-06 19:48:48,767 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 41.5 percent of original size [2021-08-06 19:48:48,769 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 41.5 percent of original size [2021-08-06 19:48:48,789 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 27.3 percent of original size [2021-08-06 19:48:48,791 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 27.3 percent of original size [2021-08-06 19:48:48,803 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 5.3 percent of original size [2021-08-06 19:48:48,803 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 5.3 percent of original size [2021-08-06 19:48:48,805 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 31, result has 3.1 percent of original size [2021-08-06 19:48:48,808 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 31, result has 3.1 percent of original size [2021-08-06 19:48:48,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:48:48,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:48,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602465987] [2021-08-06 19:48:48,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602465987] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:48:48,812 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:48:48,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 19:48:48,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448401248] [2021-08-06 19:48:48,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:48:48,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:48,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:48:48,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:48:48,813 INFO L87 Difference]: Start difference. First operand 1737 states and 3447 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:49,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:49,058 INFO L93 Difference]: Finished difference Result 2105 states and 4140 transitions. [2021-08-06 19:48:49,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 19:48:49,058 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 19:48:49,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:49,061 INFO L225 Difference]: With dead ends: 2105 [2021-08-06 19:48:49,061 INFO L226 Difference]: Without dead ends: 2018 [2021-08-06 19:48:49,061 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 129.2ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:48:49,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2018 states. [2021-08-06 19:48:49,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2018 to 1726. [2021-08-06 19:48:49,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1726 states, 1725 states have (on average 1.983768115942029) internal successors, (3422), 1725 states have internal predecessors, (3422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:49,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 3422 transitions. [2021-08-06 19:48:49,082 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 3422 transitions. Word has length 48 [2021-08-06 19:48:49,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:49,082 INFO L470 AbstractCegarLoop]: Abstraction has 1726 states and 3422 transitions. [2021-08-06 19:48:49,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:49,082 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 3422 transitions. [2021-08-06 19:48:49,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:48:49,084 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:49,084 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:49,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-08-06 19:48:49,085 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:49,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:49,085 INFO L82 PathProgramCache]: Analyzing trace with hash -187613498, now seen corresponding path program 37 times [2021-08-06 19:48:49,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:49,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93671604] [2021-08-06 19:48:49,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:49,086 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:49,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:49,154 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 74.2 percent of original size [2021-08-06 19:48:49,162 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 74.2 percent of original size [2021-08-06 19:48:49,204 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 79.0 percent of original size [2021-08-06 19:48:49,212 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 79.0 percent of original size [2021-08-06 19:48:49,244 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 63.2 percent of original size [2021-08-06 19:48:49,250 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 63.2 percent of original size [2021-08-06 19:48:49,280 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 54.7 percent of original size [2021-08-06 19:48:49,285 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 54.7 percent of original size [2021-08-06 19:48:49,311 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 38, result has 38.7 percent of original size [2021-08-06 19:48:49,314 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 38, result has 38.7 percent of original size [2021-08-06 19:48:49,334 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 5.3 percent of original size [2021-08-06 19:48:49,335 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 5.3 percent of original size [2021-08-06 19:48:49,337 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 31, result has 3.1 percent of original size [2021-08-06 19:48:49,337 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 31, result has 3.1 percent of original size [2021-08-06 19:48:49,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:48:49,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:49,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93671604] [2021-08-06 19:48:49,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93671604] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:48:49,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:48:49,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 19:48:49,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171616034] [2021-08-06 19:48:49,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:48:49,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:49,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:48:49,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:48:49,343 INFO L87 Difference]: Start difference. First operand 1726 states and 3422 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:49,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:49,604 INFO L93 Difference]: Finished difference Result 1974 states and 3893 transitions. [2021-08-06 19:48:49,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:48:49,604 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 19:48:49,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:49,606 INFO L225 Difference]: With dead ends: 1974 [2021-08-06 19:48:49,606 INFO L226 Difference]: Without dead ends: 1906 [2021-08-06 19:48:49,606 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 182.8ms TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:48:49,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1906 states. [2021-08-06 19:48:49,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1906 to 1714. [2021-08-06 19:48:49,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1714 states, 1713 states have (on average 1.9830706363105663) internal successors, (3397), 1713 states have internal predecessors, (3397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:49,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1714 states to 1714 states and 3397 transitions. [2021-08-06 19:48:49,621 INFO L78 Accepts]: Start accepts. Automaton has 1714 states and 3397 transitions. Word has length 48 [2021-08-06 19:48:49,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:49,621 INFO L470 AbstractCegarLoop]: Abstraction has 1714 states and 3397 transitions. [2021-08-06 19:48:49,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:49,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1714 states and 3397 transitions. [2021-08-06 19:48:49,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:48:49,623 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:49,623 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:49,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-08-06 19:48:49,623 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:49,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:49,623 INFO L82 PathProgramCache]: Analyzing trace with hash 649127656, now seen corresponding path program 38 times [2021-08-06 19:48:49,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:49,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384839769] [2021-08-06 19:48:49,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:49,624 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:49,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:49,682 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 74.2 percent of original size [2021-08-06 19:48:49,689 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 74.2 percent of original size [2021-08-06 19:48:49,728 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 79.0 percent of original size [2021-08-06 19:48:49,736 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 79.0 percent of original size [2021-08-06 19:48:49,772 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 60.9 percent of original size [2021-08-06 19:48:49,778 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 60.9 percent of original size [2021-08-06 19:48:49,801 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 62.8 percent of original size [2021-08-06 19:48:49,805 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 62.8 percent of original size [2021-08-06 19:48:49,829 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 52.4 percent of original size [2021-08-06 19:48:49,832 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 52.4 percent of original size [2021-08-06 19:48:49,848 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 5.3 percent of original size [2021-08-06 19:48:49,849 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 5.3 percent of original size [2021-08-06 19:48:49,851 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 31, result has 3.1 percent of original size [2021-08-06 19:48:49,852 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 31, result has 3.1 percent of original size [2021-08-06 19:48:49,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:48:49,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:49,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384839769] [2021-08-06 19:48:49,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384839769] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:48:49,856 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:48:49,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 19:48:49,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270671886] [2021-08-06 19:48:49,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:48:49,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:49,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:48:49,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:48:49,857 INFO L87 Difference]: Start difference. First operand 1714 states and 3397 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:50,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:50,111 INFO L93 Difference]: Finished difference Result 2072 states and 4073 transitions. [2021-08-06 19:48:50,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:48:50,112 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 19:48:50,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:50,114 INFO L225 Difference]: With dead ends: 2072 [2021-08-06 19:48:50,114 INFO L226 Difference]: Without dead ends: 1965 [2021-08-06 19:48:50,114 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 167.2ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:48:50,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1965 states. [2021-08-06 19:48:50,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1965 to 1694. [2021-08-06 19:48:50,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1694 states, 1693 states have (on average 1.9875959834613113) internal successors, (3365), 1693 states have internal predecessors, (3365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:50,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1694 states to 1694 states and 3365 transitions. [2021-08-06 19:48:50,129 INFO L78 Accepts]: Start accepts. Automaton has 1694 states and 3365 transitions. Word has length 48 [2021-08-06 19:48:50,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:50,129 INFO L470 AbstractCegarLoop]: Abstraction has 1694 states and 3365 transitions. [2021-08-06 19:48:50,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:50,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1694 states and 3365 transitions. [2021-08-06 19:48:50,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:48:50,131 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:50,131 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:50,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-08-06 19:48:50,132 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:50,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:50,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1084798080, now seen corresponding path program 39 times [2021-08-06 19:48:50,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:50,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209517058] [2021-08-06 19:48:50,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:50,132 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:50,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:50,192 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 74.2 percent of original size [2021-08-06 19:48:50,199 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 74.2 percent of original size [2021-08-06 19:48:50,236 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 86.0 percent of original size [2021-08-06 19:48:50,242 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 86.0 percent of original size [2021-08-06 19:48:50,277 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 60.9 percent of original size [2021-08-06 19:48:50,282 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 60.9 percent of original size [2021-08-06 19:48:50,304 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 62.8 percent of original size [2021-08-06 19:48:50,308 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 62.8 percent of original size [2021-08-06 19:48:50,331 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 52.4 percent of original size [2021-08-06 19:48:50,334 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 52.4 percent of original size [2021-08-06 19:48:50,351 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 5.3 percent of original size [2021-08-06 19:48:50,352 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 5.3 percent of original size [2021-08-06 19:48:50,353 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 31, result has 3.1 percent of original size [2021-08-06 19:48:50,354 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 31, result has 3.1 percent of original size [2021-08-06 19:48:50,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:48:50,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:50,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209517058] [2021-08-06 19:48:50,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209517058] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:48:50,358 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:48:50,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 19:48:50,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850827961] [2021-08-06 19:48:50,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:48:50,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:50,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:48:50,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:48:50,359 INFO L87 Difference]: Start difference. First operand 1694 states and 3365 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:50,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:50,700 INFO L93 Difference]: Finished difference Result 2302 states and 4629 transitions. [2021-08-06 19:48:50,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:48:50,700 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 19:48:50,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:50,703 INFO L225 Difference]: With dead ends: 2302 [2021-08-06 19:48:50,703 INFO L226 Difference]: Without dead ends: 2201 [2021-08-06 19:48:50,704 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 216.4ms TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:48:50,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2201 states. [2021-08-06 19:48:50,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2201 to 1655. [2021-08-06 19:48:50,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1655 states, 1654 states have (on average 1.9933494558645708) internal successors, (3297), 1654 states have internal predecessors, (3297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:50,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1655 states to 1655 states and 3297 transitions. [2021-08-06 19:48:50,729 INFO L78 Accepts]: Start accepts. Automaton has 1655 states and 3297 transitions. Word has length 48 [2021-08-06 19:48:50,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:50,729 INFO L470 AbstractCegarLoop]: Abstraction has 1655 states and 3297 transitions. [2021-08-06 19:48:50,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:50,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1655 states and 3297 transitions. [2021-08-06 19:48:50,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:48:50,731 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:50,732 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:50,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-08-06 19:48:50,732 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:50,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:50,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1828980740, now seen corresponding path program 40 times [2021-08-06 19:48:50,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:50,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977153497] [2021-08-06 19:48:50,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:50,733 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:50,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:50,770 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 76.9 percent of original size [2021-08-06 19:48:50,771 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 76.9 percent of original size [2021-08-06 19:48:50,784 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 19:48:50,785 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 19:48:50,795 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 19:48:50,796 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 19:48:50,808 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 82.8 percent of original size [2021-08-06 19:48:50,812 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 82.8 percent of original size [2021-08-06 19:48:50,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:48:50,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:50,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977153497] [2021-08-06 19:48:50,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977153497] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:48:50,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:48:50,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-06 19:48:50,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347113261] [2021-08-06 19:48:50,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:48:50,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:50,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:48:50,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:48:50,875 INFO L87 Difference]: Start difference. First operand 1655 states and 3297 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:51,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:51,072 INFO L93 Difference]: Finished difference Result 1935 states and 3857 transitions. [2021-08-06 19:48:51,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:48:51,072 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 19:48:51,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:51,074 INFO L225 Difference]: With dead ends: 1935 [2021-08-06 19:48:51,074 INFO L226 Difference]: Without dead ends: 1728 [2021-08-06 19:48:51,074 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 114.4ms TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:48:51,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1728 states. [2021-08-06 19:48:51,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1728 to 1453. [2021-08-06 19:48:51,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1453 states, 1452 states have (on average 2.0516528925619837) internal successors, (2979), 1452 states have internal predecessors, (2979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:51,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1453 states to 1453 states and 2979 transitions. [2021-08-06 19:48:51,090 INFO L78 Accepts]: Start accepts. Automaton has 1453 states and 2979 transitions. Word has length 48 [2021-08-06 19:48:51,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:51,090 INFO L470 AbstractCegarLoop]: Abstraction has 1453 states and 2979 transitions. [2021-08-06 19:48:51,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:51,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1453 states and 2979 transitions. [2021-08-06 19:48:51,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:48:51,092 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:51,092 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:51,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-08-06 19:48:51,092 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:51,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:51,093 INFO L82 PathProgramCache]: Analyzing trace with hash -708944124, now seen corresponding path program 41 times [2021-08-06 19:48:51,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:51,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402488430] [2021-08-06 19:48:51,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:51,093 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:51,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:51,230 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 65.1 percent of original size [2021-08-06 19:48:51,232 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 65.1 percent of original size [2021-08-06 19:48:51,258 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 82.9 percent of original size [2021-08-06 19:48:51,261 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 82.9 percent of original size [2021-08-06 19:48:51,297 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 82.1 percent of original size [2021-08-06 19:48:51,301 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 82.1 percent of original size [2021-08-06 19:48:51,327 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 37, result has 36.2 percent of original size [2021-08-06 19:48:51,330 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 37, result has 36.2 percent of original size [2021-08-06 19:48:51,348 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:48:51,349 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:48:51,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:48:51,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:51,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402488430] [2021-08-06 19:48:51,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402488430] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:48:51,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:48:51,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-08-06 19:48:51,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203578462] [2021-08-06 19:48:51,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:48:51,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:51,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:48:51,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:48:51,354 INFO L87 Difference]: Start difference. First operand 1453 states and 2979 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:51,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:51,580 INFO L93 Difference]: Finished difference Result 1599 states and 3245 transitions. [2021-08-06 19:48:51,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:48:51,580 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 19:48:51,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:51,582 INFO L225 Difference]: With dead ends: 1599 [2021-08-06 19:48:51,582 INFO L226 Difference]: Without dead ends: 1572 [2021-08-06 19:48:51,583 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 160.8ms TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:48:51,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1572 states. [2021-08-06 19:48:51,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1572 to 1471. [2021-08-06 19:48:51,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1471 states, 1470 states have (on average 2.0564625850340135) internal successors, (3023), 1470 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:51,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 3023 transitions. [2021-08-06 19:48:51,599 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 3023 transitions. Word has length 48 [2021-08-06 19:48:51,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:51,599 INFO L470 AbstractCegarLoop]: Abstraction has 1471 states and 3023 transitions. [2021-08-06 19:48:51,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:51,599 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 3023 transitions. [2021-08-06 19:48:51,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:48:51,601 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:51,601 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:51,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-08-06 19:48:51,602 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:51,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:51,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1923912524, now seen corresponding path program 42 times [2021-08-06 19:48:51,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:51,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627313770] [2021-08-06 19:48:51,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:51,602 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:51,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:51,679 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 19:48:51,680 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 19:48:51,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:48:51,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:51,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627313770] [2021-08-06 19:48:51,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627313770] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:48:51,696 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:48:51,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-06 19:48:51,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756624342] [2021-08-06 19:48:51,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:48:51,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:51,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:48:51,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:48:51,697 INFO L87 Difference]: Start difference. First operand 1471 states and 3023 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:51,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:51,835 INFO L93 Difference]: Finished difference Result 1519 states and 3091 transitions. [2021-08-06 19:48:51,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:48:51,836 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 19:48:51,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:51,837 INFO L225 Difference]: With dead ends: 1519 [2021-08-06 19:48:51,838 INFO L226 Difference]: Without dead ends: 1157 [2021-08-06 19:48:51,838 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 130.8ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:48:51,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1157 states. [2021-08-06 19:48:51,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1157 to 1129. [2021-08-06 19:48:51,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1129 states, 1128 states have (on average 1.9937943262411348) internal successors, (2249), 1128 states have internal predecessors, (2249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:51,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1129 states to 1129 states and 2249 transitions. [2021-08-06 19:48:51,851 INFO L78 Accepts]: Start accepts. Automaton has 1129 states and 2249 transitions. Word has length 48 [2021-08-06 19:48:51,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:51,851 INFO L470 AbstractCegarLoop]: Abstraction has 1129 states and 2249 transitions. [2021-08-06 19:48:51,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:51,851 INFO L276 IsEmpty]: Start isEmpty. Operand 1129 states and 2249 transitions. [2021-08-06 19:48:51,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:48:51,852 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:51,853 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:51,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-08-06 19:48:51,853 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:51,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:51,853 INFO L82 PathProgramCache]: Analyzing trace with hash 466056950, now seen corresponding path program 43 times [2021-08-06 19:48:51,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:51,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337781459] [2021-08-06 19:48:51,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:51,853 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:51,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:51,936 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 77.8 percent of original size [2021-08-06 19:48:51,938 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 77.8 percent of original size [2021-08-06 19:48:51,955 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 80.0 percent of original size [2021-08-06 19:48:51,957 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 80.0 percent of original size [2021-08-06 19:48:52,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:48:52,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:52,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337781459] [2021-08-06 19:48:52,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337781459] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:48:52,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:48:52,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-06 19:48:52,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996627861] [2021-08-06 19:48:52,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:48:52,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:52,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:48:52,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:48:52,029 INFO L87 Difference]: Start difference. First operand 1129 states and 2249 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:52,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:52,178 INFO L93 Difference]: Finished difference Result 1307 states and 2589 transitions. [2021-08-06 19:48:52,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:48:52,179 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 19:48:52,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:52,180 INFO L225 Difference]: With dead ends: 1307 [2021-08-06 19:48:52,180 INFO L226 Difference]: Without dead ends: 875 [2021-08-06 19:48:52,180 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 99.0ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:48:52,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-08-06 19:48:52,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 866. [2021-08-06 19:48:52,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 1.9745664739884392) internal successors, (1708), 865 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:52,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1708 transitions. [2021-08-06 19:48:52,188 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1708 transitions. Word has length 48 [2021-08-06 19:48:52,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:52,188 INFO L470 AbstractCegarLoop]: Abstraction has 866 states and 1708 transitions. [2021-08-06 19:48:52,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:52,188 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1708 transitions. [2021-08-06 19:48:52,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:48:52,190 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:52,190 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:52,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-08-06 19:48:52,190 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:52,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:52,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1275522348, now seen corresponding path program 44 times [2021-08-06 19:48:52,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:52,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108554042] [2021-08-06 19:48:52,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:52,191 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:52,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:52,230 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 19:48:52,231 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 19:48:52,245 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 19:48:52,246 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 19:48:52,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:48:52,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:52,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108554042] [2021-08-06 19:48:52,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108554042] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:48:52,268 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:48:52,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 19:48:52,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179726060] [2021-08-06 19:48:52,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:48:52,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:52,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:48:52,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:48:52,269 INFO L87 Difference]: Start difference. First operand 866 states and 1708 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:52,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:52,409 INFO L93 Difference]: Finished difference Result 1045 states and 2075 transitions. [2021-08-06 19:48:52,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:48:52,410 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 19:48:52,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:52,411 INFO L225 Difference]: With dead ends: 1045 [2021-08-06 19:48:52,411 INFO L226 Difference]: Without dead ends: 621 [2021-08-06 19:48:52,411 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 77.7ms TimeCoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:48:52,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-08-06 19:48:52,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 595. [2021-08-06 19:48:52,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 594 states have (on average 1.936026936026936) internal successors, (1150), 594 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:52,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 1150 transitions. [2021-08-06 19:48:52,418 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 1150 transitions. Word has length 48 [2021-08-06 19:48:52,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:52,418 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 1150 transitions. [2021-08-06 19:48:52,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:52,418 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 1150 transitions. [2021-08-06 19:48:52,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:48:52,420 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:52,420 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:52,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-08-06 19:48:52,421 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:52,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:52,421 INFO L82 PathProgramCache]: Analyzing trace with hash 2049071902, now seen corresponding path program 45 times [2021-08-06 19:48:52,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:52,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145410219] [2021-08-06 19:48:52,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:52,422 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:52,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:52,458 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 19:48:52,460 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 19:48:52,471 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 19:48:52,472 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 19:48:52,481 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 37.5 percent of original size [2021-08-06 19:48:52,482 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 37.5 percent of original size [2021-08-06 19:48:52,492 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 31.8 percent of original size [2021-08-06 19:48:52,494 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 31.8 percent of original size [2021-08-06 19:48:52,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:48:52,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:52,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145410219] [2021-08-06 19:48:52,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145410219] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:48:52,509 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:48:52,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 19:48:52,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769918741] [2021-08-06 19:48:52,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:48:52,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:52,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:48:52,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:48:52,510 INFO L87 Difference]: Start difference. First operand 595 states and 1150 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:52,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:52,642 INFO L93 Difference]: Finished difference Result 1129 states and 2226 transitions. [2021-08-06 19:48:52,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:48:52,642 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 19:48:52,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:52,644 INFO L225 Difference]: With dead ends: 1129 [2021-08-06 19:48:52,644 INFO L226 Difference]: Without dead ends: 911 [2021-08-06 19:48:52,644 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 67.2ms TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:48:52,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2021-08-06 19:48:52,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 581. [2021-08-06 19:48:52,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 580 states have (on average 1.9396551724137931) internal successors, (1125), 580 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:52,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 1125 transitions. [2021-08-06 19:48:52,651 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 1125 transitions. Word has length 48 [2021-08-06 19:48:52,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:52,652 INFO L470 AbstractCegarLoop]: Abstraction has 581 states and 1125 transitions. [2021-08-06 19:48:52,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:52,652 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 1125 transitions. [2021-08-06 19:48:52,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:48:52,653 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:52,653 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:52,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-08-06 19:48:52,653 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:52,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:52,653 INFO L82 PathProgramCache]: Analyzing trace with hash 390867480, now seen corresponding path program 46 times [2021-08-06 19:48:52,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:52,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261561323] [2021-08-06 19:48:52,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:52,654 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:52,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:52,730 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 60.0 percent of original size [2021-08-06 19:48:52,733 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 60.0 percent of original size [2021-08-06 19:48:52,743 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 79.4 percent of original size [2021-08-06 19:48:52,745 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 79.4 percent of original size [2021-08-06 19:48:52,763 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 76.7 percent of original size [2021-08-06 19:48:52,765 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 76.7 percent of original size [2021-08-06 19:48:52,783 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 90.5 percent of original size [2021-08-06 19:48:52,787 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 90.5 percent of original size [2021-08-06 19:48:52,821 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 80.0 percent of original size [2021-08-06 19:48:52,825 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 80.0 percent of original size [2021-08-06 19:48:52,853 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 77.1 percent of original size [2021-08-06 19:48:52,856 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 77.1 percent of original size [2021-08-06 19:48:52,883 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:48:52,884 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:48:52,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:48:52,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:52,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261561323] [2021-08-06 19:48:52,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261561323] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:48:52,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:48:52,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-08-06 19:48:52,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383898930] [2021-08-06 19:48:52,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:48:52,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:52,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:48:52,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:48:52,901 INFO L87 Difference]: Start difference. First operand 581 states and 1125 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:53,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:53,129 INFO L93 Difference]: Finished difference Result 1099 states and 2181 transitions. [2021-08-06 19:48:53,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:48:53,129 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 19:48:53,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:53,130 INFO L225 Difference]: With dead ends: 1099 [2021-08-06 19:48:53,130 INFO L226 Difference]: Without dead ends: 974 [2021-08-06 19:48:53,130 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 180.7ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:48:53,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2021-08-06 19:48:53,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 654. [2021-08-06 19:48:53,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 653 states have (on average 1.9509954058192955) internal successors, (1274), 653 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:53,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 1274 transitions. [2021-08-06 19:48:53,139 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 1274 transitions. Word has length 48 [2021-08-06 19:48:53,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:53,139 INFO L470 AbstractCegarLoop]: Abstraction has 654 states and 1274 transitions. [2021-08-06 19:48:53,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:53,139 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 1274 transitions. [2021-08-06 19:48:53,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:48:53,140 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:53,140 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:53,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-08-06 19:48:53,140 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:53,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:53,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1621344402, now seen corresponding path program 47 times [2021-08-06 19:48:53,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:53,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243540933] [2021-08-06 19:48:53,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:53,141 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:53,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:53,201 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 19:48:53,202 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 19:48:53,213 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 56.5 percent of original size [2021-08-06 19:48:53,215 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 56.5 percent of original size [2021-08-06 19:48:53,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:48:53,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:53,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243540933] [2021-08-06 19:48:53,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243540933] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:48:53,232 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:48:53,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-06 19:48:53,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953664466] [2021-08-06 19:48:53,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:48:53,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:53,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:48:53,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:48:53,233 INFO L87 Difference]: Start difference. First operand 654 states and 1274 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:53,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:53,384 INFO L93 Difference]: Finished difference Result 1026 states and 1994 transitions. [2021-08-06 19:48:53,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:48:53,384 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 19:48:53,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:53,385 INFO L225 Difference]: With dead ends: 1026 [2021-08-06 19:48:53,385 INFO L226 Difference]: Without dead ends: 731 [2021-08-06 19:48:53,385 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 68.0ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:48:53,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2021-08-06 19:48:53,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 569. [2021-08-06 19:48:53,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 568 states have (on average 1.926056338028169) internal successors, (1094), 568 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:53,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 1094 transitions. [2021-08-06 19:48:53,391 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 1094 transitions. Word has length 48 [2021-08-06 19:48:53,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:53,391 INFO L470 AbstractCegarLoop]: Abstraction has 569 states and 1094 transitions. [2021-08-06 19:48:53,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:53,391 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 1094 transitions. [2021-08-06 19:48:53,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:48:53,392 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:53,392 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:53,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-08-06 19:48:53,392 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:53,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:53,392 INFO L82 PathProgramCache]: Analyzing trace with hash -753768606, now seen corresponding path program 48 times [2021-08-06 19:48:53,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:53,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178874635] [2021-08-06 19:48:53,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:53,393 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:53,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:53,433 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 78.8 percent of original size [2021-08-06 19:48:53,436 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 78.8 percent of original size [2021-08-06 19:48:53,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:48:53,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:53,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178874635] [2021-08-06 19:48:53,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178874635] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:48:53,554 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:48:53,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-08-06 19:48:53,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557718006] [2021-08-06 19:48:53,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:48:53,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:53,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:48:53,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:48:53,555 INFO L87 Difference]: Start difference. First operand 569 states and 1094 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:53,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:53,716 INFO L93 Difference]: Finished difference Result 858 states and 1677 transitions. [2021-08-06 19:48:53,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:48:53,717 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 19:48:53,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:53,717 INFO L225 Difference]: With dead ends: 858 [2021-08-06 19:48:53,717 INFO L226 Difference]: Without dead ends: 442 [2021-08-06 19:48:53,718 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 107.0ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:48:53,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-08-06 19:48:53,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 442. [2021-08-06 19:48:53,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 1.9206349206349207) internal successors, (847), 441 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:53,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 847 transitions. [2021-08-06 19:48:53,722 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 847 transitions. Word has length 48 [2021-08-06 19:48:53,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:53,723 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 847 transitions. [2021-08-06 19:48:53,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:53,723 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 847 transitions. [2021-08-06 19:48:53,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:48:53,723 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:53,723 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:53,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-08-06 19:48:53,724 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:53,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:53,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1894352576, now seen corresponding path program 49 times [2021-08-06 19:48:53,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:53,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296567886] [2021-08-06 19:48:53,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:53,724 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:53,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:53,753 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 66.0 percent of original size [2021-08-06 19:48:53,756 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 66.0 percent of original size [2021-08-06 19:48:53,774 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 20.0 percent of original size [2021-08-06 19:48:53,775 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 20.0 percent of original size [2021-08-06 19:48:53,784 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 47.8 percent of original size [2021-08-06 19:48:53,786 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 47.8 percent of original size [2021-08-06 19:48:53,802 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 19:48:53,803 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 19:48:53,813 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 19:48:53,814 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 19:48:53,828 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 64, result has 27.3 percent of original size [2021-08-06 19:48:53,832 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 64, result has 27.3 percent of original size [2021-08-06 19:48:53,859 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 35.1 percent of original size [2021-08-06 19:48:53,860 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 35.1 percent of original size [2021-08-06 19:48:53,877 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 32, result has 31.9 percent of original size [2021-08-06 19:48:53,879 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 32, result has 31.9 percent of original size [2021-08-06 19:48:53,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:48:53,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:53,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296567886] [2021-08-06 19:48:53,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296567886] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:48:53,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:48:53,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-08-06 19:48:53,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715883059] [2021-08-06 19:48:53,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:48:53,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:53,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:48:53,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:48:53,898 INFO L87 Difference]: Start difference. First operand 442 states and 847 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:54,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:54,130 INFO L93 Difference]: Finished difference Result 504 states and 972 transitions. [2021-08-06 19:48:54,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:48:54,130 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 19:48:54,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:54,130 INFO L225 Difference]: With dead ends: 504 [2021-08-06 19:48:54,130 INFO L226 Difference]: Without dead ends: 181 [2021-08-06 19:48:54,131 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 205.0ms TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:48:54,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-08-06 19:48:54,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2021-08-06 19:48:54,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.8166666666666667) internal successors, (327), 180 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:54,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 327 transitions. [2021-08-06 19:48:54,133 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 327 transitions. Word has length 48 [2021-08-06 19:48:54,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:54,133 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 327 transitions. [2021-08-06 19:48:54,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:54,133 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 327 transitions. [2021-08-06 19:48:54,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-06 19:48:54,133 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:54,133 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:54,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-08-06 19:48:54,133 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:48:54,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:54,134 INFO L82 PathProgramCache]: Analyzing trace with hash 387411244, now seen corresponding path program 50 times [2021-08-06 19:48:54,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:54,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013131197] [2021-08-06 19:48:54,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:54,134 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:54,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:54,155 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 24.1 percent of original size [2021-08-06 19:48:54,156 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 24.1 percent of original size [2021-08-06 19:48:54,165 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 31.3 percent of original size [2021-08-06 19:48:54,166 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 31.3 percent of original size [2021-08-06 19:48:54,178 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 70.8 percent of original size [2021-08-06 19:48:54,179 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 70.8 percent of original size [2021-08-06 19:48:54,191 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 19:48:54,193 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 68.2 percent of original size [2021-08-06 19:48:54,200 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 75.9 percent of original size [2021-08-06 19:48:54,202 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 75.9 percent of original size [2021-08-06 19:48:54,216 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 72.0 percent of original size [2021-08-06 19:48:54,218 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 72.0 percent of original size [2021-08-06 19:48:54,233 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 34.6 percent of original size [2021-08-06 19:48:54,234 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 34.6 percent of original size [2021-08-06 19:48:54,246 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:48:54,247 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:48:54,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:48:54,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:54,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013131197] [2021-08-06 19:48:54,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013131197] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:48:54,253 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:48:54,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-06 19:48:54,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761639287] [2021-08-06 19:48:54,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:48:54,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:54,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:48:54,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:48:54,254 INFO L87 Difference]: Start difference. First operand 181 states and 327 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:54,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:54,305 INFO L93 Difference]: Finished difference Result 157 states and 283 transitions. [2021-08-06 19:48:54,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:48:54,305 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-06 19:48:54,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:54,306 INFO L225 Difference]: With dead ends: 157 [2021-08-06 19:48:54,306 INFO L226 Difference]: Without dead ends: 0 [2021-08-06 19:48:54,306 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 39.6ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:48:54,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-06 19:48:54,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-06 19:48:54,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:54,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-06 19:48:54,306 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 48 [2021-08-06 19:48:54,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:54,306 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-06 19:48:54,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:54,306 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-06 19:48:54,306 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-06 19:48:54,308 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-06 19:48:54,312 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-06 19:48:54,313 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-06 19:48:54,313 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-06 19:48:54,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-08-06 19:48:54,319 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-06 19:48:54,319 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-06 19:48:54,321 INFO L202 PluginConnector]: Adding new model bakery-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.08 07:48:54 BasicIcfg [2021-08-06 19:48:54,321 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-06 19:48:54,321 INFO L168 Benchmark]: Toolchain (without parser) took 23472.18 ms. Allocated memory was 197.1 MB in the beginning and 671.1 MB in the end (delta: 474.0 MB). Free memory was 177.7 MB in the beginning and 518.6 MB in the end (delta: -340.9 MB). Peak memory consumption was 133.8 MB. Max. memory is 8.0 GB. [2021-08-06 19:48:54,321 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 197.1 MB. Free memory is still 178.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 19:48:54,321 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.94 ms. Allocated memory is still 197.1 MB. Free memory was 177.7 MB in the beginning and 176.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-06 19:48:54,322 INFO L168 Benchmark]: Boogie Preprocessor took 12.85 ms. Allocated memory is still 197.1 MB. Free memory was 176.2 MB in the beginning and 175.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 19:48:54,322 INFO L168 Benchmark]: RCFGBuilder took 304.37 ms. Allocated memory is still 197.1 MB. Free memory was 175.1 MB in the beginning and 160.8 MB in the end (delta: 14.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-08-06 19:48:54,322 INFO L168 Benchmark]: TraceAbstraction took 23120.28 ms. Allocated memory was 197.1 MB in the beginning and 671.1 MB in the end (delta: 474.0 MB). Free memory was 160.3 MB in the beginning and 518.6 MB in the end (delta: -358.3 MB). Peak memory consumption was 116.0 MB. Max. memory is 8.0 GB. [2021-08-06 19:48:54,322 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 0.13 ms. Allocated memory is still 197.1 MB. Free memory is still 178.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 29.94 ms. Allocated memory is still 197.1 MB. Free memory was 177.7 MB in the beginning and 176.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 12.85 ms. Allocated memory is still 197.1 MB. Free memory was 176.2 MB in the beginning and 175.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 304.37 ms. Allocated memory is still 197.1 MB. Free memory was 175.1 MB in the beginning and 160.8 MB in the end (delta: 14.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 23120.28 ms. Allocated memory was 197.1 MB in the beginning and 671.1 MB in the end (delta: 474.0 MB). Free memory was 160.3 MB in the beginning and 518.6 MB in the end (delta: -358.3 MB). Peak memory consumption was 116.0 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: 7333, positive: 6624, positive conditional: 6624, positive unconditional: 0, negative: 709, negative conditional: 709, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 7333, positive: 6624, positive conditional: 0, positive unconditional: 6624, negative: 709, negative conditional: 0, negative unconditional: 709, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 740, positive: 670, positive conditional: 0, positive unconditional: 670, negative: 70, negative conditional: 0, negative unconditional: 70, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 740, positive: 654, positive conditional: 0, positive unconditional: 654, negative: 86, negative conditional: 0, negative unconditional: 86, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 86, positive: 16, positive conditional: 0, positive unconditional: 16, negative: 70, negative conditional: 0, negative unconditional: 70, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 213, positive: 39, positive conditional: 0, positive unconditional: 39, negative: 175, negative conditional: 0, negative unconditional: 175, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 7333, positive: 5954, positive conditional: 0, positive unconditional: 5954, negative: 639, negative conditional: 0, negative unconditional: 639, unknown: 740, unknown conditional: 0, unknown unconditional: 740] , Statistics on independence cache: Total cache size (in pairs): 740, Positive cache size: 670, Positive conditional cache size: 0, Positive unconditional cache size: 670, Negative cache size: 70, Negative conditional cache size: 0, Negative unconditional cache size: 70, Independence queries for same thread: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 82]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 99 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 22972.7ms, OverallIterations: 50, TraceHistogramMax: 1, EmptinessCheckTime: 271.5ms, AutomataDifference: 11344.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 609.5ms, PartialOrderReductionTime: 596.4ms, HoareTripleCheckerStatistics: 4418 SDtfs, 6823 SDslu, 15511 SDs, 0 SdLazy, 10531 SolverSat, 1626 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5599.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 653 GetRequests, 106 SyntacticMatches, 34 SemanticMatches, 513 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 5652.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=4040occurred in iteration=14, InterpolantAutomatonStates: 506, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 2347.8ms AutomataMinimizationTime, 50 MinimizatonAttempts, 25747 StatesRemovedByMinimization, 45 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 49.7ms SsaConstructionTime, 310.1ms SatisfiabilityAnalysisTime, 7677.1ms InterpolantComputationTime, 2400 NumberOfCodeBlocks, 2400 NumberOfCodeBlocksAsserted, 50 NumberOfCheckSat, 2350 ConstructedInterpolants, 0 QuantifiedInterpolants, 15714 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 50 InterpolantComputations, 50 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-08-06 19:48:54,350 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...