/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/bakery-4.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 14:38:28,537 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 14:38:28,539 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 14:38:28,573 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-06 14:38:28,637 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-08-06 14:38:28,663 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 14:38:28,663 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 14:38:28,664 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-06 14:38:28,664 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-06 14:38:28,666 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 14:38:28,666 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 14:38:28,666 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 14:38:28,666 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 14:38:28,666 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 14:38:28,666 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 14:38:28,667 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 14:38:28,667 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 14:38:28,667 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 14:38:28,667 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 14:38:28,668 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 14:38:28,668 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 14:38:28,668 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 14:38:28,668 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 14:38:28,668 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 14:38:28,668 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 14:38:28,668 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 14:38:28,668 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 14:38:28,668 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 14:38:28,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 14:38:28,669 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 14:38:28,669 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 14:38:28,669 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 14:38:28,669 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 14:38:28,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 14:38:28,669 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 14:38:28,669 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 14:38:28,669 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 14:38:28,936 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 14:38:28,950 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 14:38:28,951 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 14:38:28,952 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 14:38:28,953 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 14:38:28,953 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/bakery-4.wvr.bpl [2021-08-06 14:38:28,953 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/bakery-4.wvr.bpl' [2021-08-06 14:38:29,103 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 14:38:29,104 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 14:38:29,105 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 14:38:29,105 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 14:38:29,105 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 14:38:29,113 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "bakery-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:38:29" (1/1) ... [2021-08-06 14:38:29,119 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "bakery-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:38:29" (1/1) ... [2021-08-06 14:38:29,125 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 14:38:29,126 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 14:38:29,126 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 14:38:29,126 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 14:38:29,131 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "bakery-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:38:29" (1/1) ... [2021-08-06 14:38:29,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "bakery-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:38:29" (1/1) ... [2021-08-06 14:38:29,132 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "bakery-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:38:29" (1/1) ... [2021-08-06 14:38:29,132 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "bakery-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:38:29" (1/1) ... [2021-08-06 14:38:29,135 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "bakery-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:38:29" (1/1) ... [2021-08-06 14:38:29,135 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "bakery-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:38:29" (1/1) ... [2021-08-06 14:38:29,136 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "bakery-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:38:29" (1/1) ... [2021-08-06 14:38:29,137 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 14:38:29,138 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 14:38:29,138 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 14:38:29,138 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 14:38:29,144 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "bakery-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:38:29" (1/1) ... [2021-08-06 14:38:29,150 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 14:38:29,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:38:29,165 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 14:38:29,169 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 14:38:29,197 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 14:38:29,197 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 14:38:29,197 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 14:38:29,197 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 14:38:29,197 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 14:38:29,197 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 14:38:29,198 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 14:38:29,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 14:38:29,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 14:38:29,198 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-06 14:38:29,198 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-06 14:38:29,198 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-06 14:38:29,198 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-08-06 14:38:29,198 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-08-06 14:38:29,198 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-08-06 14:38:29,199 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 14:38:29,378 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 14:38:29,378 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-06 14:38:29,380 INFO L202 PluginConnector]: Adding new model bakery-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 02:38:29 BoogieIcfgContainer [2021-08-06 14:38:29,380 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 14:38:29,381 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 14:38:29,381 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 14:38:29,383 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 14:38:29,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bakery-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:38:29" (1/2) ... [2021-08-06 14:38:29,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c8c1aa4 and model type bakery-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 02:38:29, skipping insertion in model container [2021-08-06 14:38:29,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bakery-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 02:38:29" (2/2) ... [2021-08-06 14:38:29,385 INFO L111 eAbstractionObserver]: Analyzing ICFG bakery-4.wvr.bpl [2021-08-06 14:38:29,388 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 14:38:29,388 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 14:38:29,388 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 14:38:29,388 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 14:38:29,430 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-08-06 14:38:29,457 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 14:38:29,461 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 14:38:29,461 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-08-06 14:38:29,468 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 94 places, 81 transitions, 194 flow [2021-08-06 14:38:32,290 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 93964 states, 93963 states have (on average 3.7646626863765524) internal successors, (353739), 93963 states have internal predecessors, (353739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:38:32,494 INFO L276 IsEmpty]: Start isEmpty. Operand has 93964 states, 93963 states have (on average 3.7646626863765524) internal successors, (353739), 93963 states have internal predecessors, (353739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:38:33,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-06 14:38:33,416 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:38:33,417 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, 1, 1, 1, 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 14:38:33,417 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:38:33,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:38:33,423 INFO L82 PathProgramCache]: Analyzing trace with hash 2011485542, now seen corresponding path program 1 times [2021-08-06 14:38:33,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:38:33,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65019522] [2021-08-06 14:38:33,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:38:33,430 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:38:33,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:38:33,546 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 14:38:33,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:38:33,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65019522] [2021-08-06 14:38:33,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65019522] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:38:33,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:38:33,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 14:38:33,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196867200] [2021-08-06 14:38:33,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 14:38:33,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:38:33,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 14:38:33,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 14:38:33,701 INFO L87 Difference]: Start difference. First operand has 93964 states, 93963 states have (on average 3.7646626863765524) internal successors, (353739), 93963 states have internal predecessors, (353739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:38:35,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:38:35,013 INFO L93 Difference]: Finished difference Result 93964 states and 349229 transitions. [2021-08-06 14:38:35,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 14:38:35,014 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-06 14:38:35,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:38:35,762 INFO L225 Difference]: With dead ends: 93964 [2021-08-06 14:38:35,762 INFO L226 Difference]: Without dead ends: 93964 [2021-08-06 14:38:35,763 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 14:38:36,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93964 states. [2021-08-06 14:38:38,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93964 to 93964. [2021-08-06 14:38:38,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93964 states, 93963 states have (on average 3.7166650702936264) internal successors, (349229), 93963 states have internal predecessors, (349229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:38:39,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93964 states to 93964 states and 349229 transitions. [2021-08-06 14:38:39,871 INFO L78 Accepts]: Start accepts. Automaton has 93964 states and 349229 transitions. Word has length 75 [2021-08-06 14:38:39,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:38:39,871 INFO L470 AbstractCegarLoop]: Abstraction has 93964 states and 349229 transitions. [2021-08-06 14:38:39,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:38:39,872 INFO L276 IsEmpty]: Start isEmpty. Operand 93964 states and 349229 transitions. [2021-08-06 14:38:40,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-06 14:38:40,541 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:38:40,541 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, 1, 1, 1, 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 14:38:40,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 14:38:40,548 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:38:40,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:38:40,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1256120134, now seen corresponding path program 2 times [2021-08-06 14:38:40,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:38:40,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827280446] [2021-08-06 14:38:40,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:38:40,549 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:38:40,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:38:40,598 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 14:38:40,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:38:40,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827280446] [2021-08-06 14:38:40,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827280446] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:38:40,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:38:40,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 14:38:40,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392820858] [2021-08-06 14:38:40,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 14:38:40,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:38:40,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 14:38:40,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 14:38:40,601 INFO L87 Difference]: Start difference. First operand 93964 states and 349229 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:38:41,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:38:41,353 INFO L93 Difference]: Finished difference Result 93964 states and 344549 transitions. [2021-08-06 14:38:41,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 14:38:41,354 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-06 14:38:41,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:38:41,902 INFO L225 Difference]: With dead ends: 93964 [2021-08-06 14:38:41,902 INFO L226 Difference]: Without dead ends: 93964 [2021-08-06 14:38:41,903 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 14:38:42,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93964 states. [2021-08-06 14:38:44,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93964 to 93964. [2021-08-06 14:38:44,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93964 states, 93963 states have (on average 3.666858231431521) internal successors, (344549), 93963 states have internal predecessors, (344549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:38:45,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93964 states to 93964 states and 344549 transitions. [2021-08-06 14:38:45,488 INFO L78 Accepts]: Start accepts. Automaton has 93964 states and 344549 transitions. Word has length 75 [2021-08-06 14:38:45,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:38:45,504 INFO L470 AbstractCegarLoop]: Abstraction has 93964 states and 344549 transitions. [2021-08-06 14:38:45,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:38:45,505 INFO L276 IsEmpty]: Start isEmpty. Operand 93964 states and 344549 transitions. [2021-08-06 14:38:45,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-06 14:38:45,725 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:38:45,725 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, 1, 1, 1, 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 14:38:45,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-06 14:38:45,725 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:38:45,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:38:45,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1955601766, now seen corresponding path program 3 times [2021-08-06 14:38:45,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:38:45,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736739760] [2021-08-06 14:38:45,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:38:45,726 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:38:45,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:38:46,444 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 14:38:46,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:38:46,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736739760] [2021-08-06 14:38:46,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736739760] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:38:46,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:38:46,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-06 14:38:46,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284331043] [2021-08-06 14:38:46,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:38:46,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:38:46,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:38:46,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:38:46,446 INFO L87 Difference]: Start difference. First operand 93964 states and 344549 transitions. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:38:50,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:38:50,908 INFO L93 Difference]: Finished difference Result 328634 states and 1223314 transitions. [2021-08-06 14:38:50,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:38:50,909 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-06 14:38:50,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:38:54,272 INFO L225 Difference]: With dead ends: 328634 [2021-08-06 14:38:54,272 INFO L226 Difference]: Without dead ends: 328634 [2021-08-06 14:38:54,273 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 251.4ms TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:38:55,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328634 states. [2021-08-06 14:39:01,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328634 to 117603. [2021-08-06 14:39:02,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117603 states, 117602 states have (on average 3.6610856958214995) internal successors, (430551), 117602 states have internal predecessors, (430551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:39:02,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117603 states to 117603 states and 430551 transitions. [2021-08-06 14:39:02,999 INFO L78 Accepts]: Start accepts. Automaton has 117603 states and 430551 transitions. Word has length 75 [2021-08-06 14:39:03,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:39:03,000 INFO L470 AbstractCegarLoop]: Abstraction has 117603 states and 430551 transitions. [2021-08-06 14:39:03,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:39:03,000 INFO L276 IsEmpty]: Start isEmpty. Operand 117603 states and 430551 transitions. [2021-08-06 14:39:03,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-06 14:39:03,686 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:39:03,686 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:39:03,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-06 14:39:03,687 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:39:03,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:39:03,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1001642634, now seen corresponding path program 4 times [2021-08-06 14:39:03,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:39:03,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120657967] [2021-08-06 14:39:03,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:39:03,688 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:39:03,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:39:03,839 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 14:39:03,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:39:03,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120657967] [2021-08-06 14:39:03,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120657967] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:39:03,840 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:39:03,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-06 14:39:03,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169677643] [2021-08-06 14:39:03,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:39:03,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:39:03,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:39:03,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:39:03,841 INFO L87 Difference]: Start difference. First operand 117603 states and 430551 transitions. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:39:06,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:39:06,937 INFO L93 Difference]: Finished difference Result 283513 states and 1047164 transitions. [2021-08-06 14:39:06,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:39:06,938 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-06 14:39:06,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:39:08,609 INFO L225 Difference]: With dead ends: 283513 [2021-08-06 14:39:08,610 INFO L226 Difference]: Without dead ends: 283513 [2021-08-06 14:39:08,610 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 181.2ms TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:39:09,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283513 states. [2021-08-06 14:39:16,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283513 to 143331. [2021-08-06 14:39:16,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143331 states, 143330 states have (on average 3.661201423288914) internal successors, (524760), 143330 states have internal predecessors, (524760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:39:17,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143331 states to 143331 states and 524760 transitions. [2021-08-06 14:39:17,548 INFO L78 Accepts]: Start accepts. Automaton has 143331 states and 524760 transitions. Word has length 75 [2021-08-06 14:39:17,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:39:17,548 INFO L470 AbstractCegarLoop]: Abstraction has 143331 states and 524760 transitions. [2021-08-06 14:39:17,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:39:17,548 INFO L276 IsEmpty]: Start isEmpty. Operand 143331 states and 524760 transitions. [2021-08-06 14:39:18,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-06 14:39:18,497 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:39:18,497 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:39:18,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-06 14:39:18,497 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:39:18,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:39:18,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1841467118, now seen corresponding path program 5 times [2021-08-06 14:39:18,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:39:18,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485983379] [2021-08-06 14:39:18,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:39:18,498 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:39:18,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:39:18,692 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 14:39:18,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:39:18,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485983379] [2021-08-06 14:39:18,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485983379] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:39:18,693 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:39:18,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-08-06 14:39:18,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745533280] [2021-08-06 14:39:18,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:39:18,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:39:18,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:39:18,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:39:18,694 INFO L87 Difference]: Start difference. First operand 143331 states and 524760 transitions. Second operand has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:39:20,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:39:20,331 INFO L93 Difference]: Finished difference Result 178770 states and 642652 transitions. [2021-08-06 14:39:20,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:39:20,331 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-06 14:39:20,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:39:21,985 INFO L225 Difference]: With dead ends: 178770 [2021-08-06 14:39:21,985 INFO L226 Difference]: Without dead ends: 177087 [2021-08-06 14:39:21,985 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 188.1ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:39:22,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177087 states. [2021-08-06 14:39:27,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177087 to 146828. [2021-08-06 14:39:27,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146828 states, 146827 states have (on average 3.6530883284409543) internal successors, (536372), 146827 states have internal predecessors, (536372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:39:28,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146828 states to 146828 states and 536372 transitions. [2021-08-06 14:39:28,337 INFO L78 Accepts]: Start accepts. Automaton has 146828 states and 536372 transitions. Word has length 75 [2021-08-06 14:39:28,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:39:28,339 INFO L470 AbstractCegarLoop]: Abstraction has 146828 states and 536372 transitions. [2021-08-06 14:39:28,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:39:28,340 INFO L276 IsEmpty]: Start isEmpty. Operand 146828 states and 536372 transitions. [2021-08-06 14:39:29,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-06 14:39:29,043 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:39:29,043 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, 1, 1, 1, 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 14:39:29,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-06 14:39:29,043 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:39:29,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:39:29,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1394231822, now seen corresponding path program 6 times [2021-08-06 14:39:29,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:39:29,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134464366] [2021-08-06 14:39:29,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:39:29,045 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:39:29,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:39:29,466 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 14:39:29,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:39:29,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134464366] [2021-08-06 14:39:29,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134464366] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:39:29,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:39:29,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-08-06 14:39:29,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442487076] [2021-08-06 14:39:29,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:39:29,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:39:29,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:39:29,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:39:29,468 INFO L87 Difference]: Start difference. First operand 146828 states and 536372 transitions. Second operand has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:39:32,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:39:32,152 INFO L93 Difference]: Finished difference Result 235759 states and 865359 transitions. [2021-08-06 14:39:32,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:39:32,153 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-06 14:39:32,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:39:33,827 INFO L225 Difference]: With dead ends: 235759 [2021-08-06 14:39:33,827 INFO L226 Difference]: Without dead ends: 234053 [2021-08-06 14:39:33,827 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 159.1ms TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:39:34,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234053 states. [2021-08-06 14:39:40,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234053 to 168819. [2021-08-06 14:39:40,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168819 states, 168818 states have (on average 3.665936096861709) internal successors, (618876), 168818 states have internal predecessors, (618876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:39:41,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168819 states to 168819 states and 618876 transitions. [2021-08-06 14:39:41,377 INFO L78 Accepts]: Start accepts. Automaton has 168819 states and 618876 transitions. Word has length 75 [2021-08-06 14:39:41,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:39:41,379 INFO L470 AbstractCegarLoop]: Abstraction has 168819 states and 618876 transitions. [2021-08-06 14:39:41,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:39:41,380 INFO L276 IsEmpty]: Start isEmpty. Operand 168819 states and 618876 transitions. [2021-08-06 14:39:42,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-06 14:39:42,199 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:39:42,199 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, 1, 1, 1, 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 14:39:42,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-06 14:39:42,199 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:39:42,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:39:42,200 INFO L82 PathProgramCache]: Analyzing trace with hash -2000258066, now seen corresponding path program 7 times [2021-08-06 14:39:42,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:39:42,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179634600] [2021-08-06 14:39:42,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:39:42,201 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:39:42,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:39:42,357 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 14:39:42,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:39:42,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179634600] [2021-08-06 14:39:42,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179634600] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:39:42,358 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:39:42,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-06 14:39:42,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431612789] [2021-08-06 14:39:42,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:39:42,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:39:42,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:39:42,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:39:42,359 INFO L87 Difference]: Start difference. First operand 168819 states and 618876 transitions. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:39:50,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:39:50,441 INFO L93 Difference]: Finished difference Result 658434 states and 2435908 transitions. [2021-08-06 14:39:50,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:39:50,457 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-06 14:39:50,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:39:56,112 INFO L225 Difference]: With dead ends: 658434 [2021-08-06 14:39:56,112 INFO L226 Difference]: Without dead ends: 657478 [2021-08-06 14:39:56,113 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 118.3ms TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:39:57,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657478 states. [2021-08-06 14:40:10,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657478 to 168859. [2021-08-06 14:40:11,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168859 states, 168858 states have (on average 3.6660685309550036) internal successors, (619045), 168858 states have internal predecessors, (619045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:40:12,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168859 states to 168859 states and 619045 transitions. [2021-08-06 14:40:12,477 INFO L78 Accepts]: Start accepts. Automaton has 168859 states and 619045 transitions. Word has length 75 [2021-08-06 14:40:12,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:40:12,477 INFO L470 AbstractCegarLoop]: Abstraction has 168859 states and 619045 transitions. [2021-08-06 14:40:12,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:40:12,477 INFO L276 IsEmpty]: Start isEmpty. Operand 168859 states and 619045 transitions. [2021-08-06 14:40:12,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-06 14:40:12,940 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:40:12,940 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, 1, 1, 1, 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 14:40:12,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-06 14:40:12,940 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:40:12,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:40:12,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1088824782, now seen corresponding path program 8 times [2021-08-06 14:40:12,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:40:12,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987973065] [2021-08-06 14:40:12,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:40:12,941 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:40:12,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:40:13,310 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 14:40:13,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:40:13,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987973065] [2021-08-06 14:40:13,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987973065] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:40:13,310 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:40:13,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-06 14:40:13,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965046956] [2021-08-06 14:40:13,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:40:13,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:40:13,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:40:13,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:40:13,312 INFO L87 Difference]: Start difference. First operand 168859 states and 619045 transitions. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:40:17,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:40:17,905 INFO L93 Difference]: Finished difference Result 381920 states and 1415506 transitions. [2021-08-06 14:40:17,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:40:17,918 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-06 14:40:17,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:40:21,236 INFO L225 Difference]: With dead ends: 381920 [2021-08-06 14:40:21,236 INFO L226 Difference]: Without dead ends: 381654 [2021-08-06 14:40:21,237 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 190.6ms TimeCoverageRelationStatistics Valid=124, Invalid=218, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:40:22,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381654 states. [2021-08-06 14:40:29,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381654 to 150822. [2021-08-06 14:40:29,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150822 states, 150821 states have (on average 3.6564868287572687) internal successors, (551475), 150821 states have internal predecessors, (551475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:40:30,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150822 states to 150822 states and 551475 transitions. [2021-08-06 14:40:30,902 INFO L78 Accepts]: Start accepts. Automaton has 150822 states and 551475 transitions. Word has length 75 [2021-08-06 14:40:30,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:40:30,903 INFO L470 AbstractCegarLoop]: Abstraction has 150822 states and 551475 transitions. [2021-08-06 14:40:30,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:40:30,904 INFO L276 IsEmpty]: Start isEmpty. Operand 150822 states and 551475 transitions. [2021-08-06 14:40:31,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-06 14:40:31,645 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:40:31,645 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, 1, 1, 1, 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 14:40:31,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-06 14:40:31,645 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:40:31,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:40:31,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1989302190, now seen corresponding path program 9 times [2021-08-06 14:40:31,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:40:31,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549678762] [2021-08-06 14:40:31,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:40:31,646 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:40:31,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:40:31,854 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 14:40:31,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:40:31,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549678762] [2021-08-06 14:40:31,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549678762] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:40:31,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:40:31,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-06 14:40:31,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87552336] [2021-08-06 14:40:31,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:40:31,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:40:31,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:40:31,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:40:31,856 INFO L87 Difference]: Start difference. First operand 150822 states and 551475 transitions. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:40:36,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:40:36,359 INFO L93 Difference]: Finished difference Result 458777 states and 1698770 transitions. [2021-08-06 14:40:36,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:40:36,359 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-06 14:40:36,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:40:39,844 INFO L225 Difference]: With dead ends: 458777 [2021-08-06 14:40:39,844 INFO L226 Difference]: Without dead ends: 458777 [2021-08-06 14:40:39,844 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 149.3ms TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:40:40,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458777 states. [2021-08-06 14:40:51,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458777 to 177226. [2021-08-06 14:40:51,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177226 states, 177225 states have (on average 3.6655438002539147) internal successors, (649626), 177225 states have internal predecessors, (649626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:40:53,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177226 states to 177226 states and 649626 transitions. [2021-08-06 14:40:53,418 INFO L78 Accepts]: Start accepts. Automaton has 177226 states and 649626 transitions. Word has length 75 [2021-08-06 14:40:53,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:40:53,418 INFO L470 AbstractCegarLoop]: Abstraction has 177226 states and 649626 transitions. [2021-08-06 14:40:53,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:40:53,419 INFO L276 IsEmpty]: Start isEmpty. Operand 177226 states and 649626 transitions. [2021-08-06 14:40:54,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-06 14:40:54,585 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:40:54,585 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, 1, 1, 1, 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 14:40:54,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-06 14:40:54,585 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:40:54,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:40:54,585 INFO L82 PathProgramCache]: Analyzing trace with hash -2111315214, now seen corresponding path program 10 times [2021-08-06 14:40:54,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:40:54,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946749384] [2021-08-06 14:40:54,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:40:54,586 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:40:54,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:40:54,693 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 14:40:54,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:40:54,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946749384] [2021-08-06 14:40:54,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946749384] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:40:54,694 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:40:54,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-08-06 14:40:54,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857695509] [2021-08-06 14:40:54,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:40:54,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:40:54,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:40:54,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:40:54,695 INFO L87 Difference]: Start difference. First operand 177226 states and 649626 transitions. Second operand has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:40:56,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:40:56,707 INFO L93 Difference]: Finished difference Result 212886 states and 768496 transitions. [2021-08-06 14:40:56,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:40:56,707 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-06 14:40:56,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:40:57,933 INFO L225 Difference]: With dead ends: 212886 [2021-08-06 14:40:57,933 INFO L226 Difference]: Without dead ends: 210707 [2021-08-06 14:40:57,934 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 154.3ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:40:58,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210707 states. [2021-08-06 14:41:03,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210707 to 176227. [2021-08-06 14:41:03,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176227 states, 176226 states have (on average 3.664113127461328) internal successors, (645712), 176226 states have internal predecessors, (645712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:41:05,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176227 states to 176227 states and 645712 transitions. [2021-08-06 14:41:05,233 INFO L78 Accepts]: Start accepts. Automaton has 176227 states and 645712 transitions. Word has length 75 [2021-08-06 14:41:05,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:41:05,233 INFO L470 AbstractCegarLoop]: Abstraction has 176227 states and 645712 transitions. [2021-08-06 14:41:05,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:41:05,234 INFO L276 IsEmpty]: Start isEmpty. Operand 176227 states and 645712 transitions. [2021-08-06 14:41:06,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-06 14:41:06,032 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:41:06,032 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, 1, 1, 1, 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 14:41:06,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-06 14:41:06,032 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:41:06,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:41:06,033 INFO L82 PathProgramCache]: Analyzing trace with hash 148994446, now seen corresponding path program 11 times [2021-08-06 14:41:06,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:41:06,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374529000] [2021-08-06 14:41:06,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:41:06,033 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:41:06,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:41:06,206 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 14:41:06,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:41:06,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374529000] [2021-08-06 14:41:06,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374529000] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:41:06,207 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:41:06,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-06 14:41:06,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452460904] [2021-08-06 14:41:06,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:41:06,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:41:06,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:41:06,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:41:06,209 INFO L87 Difference]: Start difference. First operand 176227 states and 645712 transitions. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:41:10,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:41:10,171 INFO L93 Difference]: Finished difference Result 351847 states and 1271416 transitions. [2021-08-06 14:41:10,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:41:10,171 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-06 14:41:10,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:41:13,352 INFO L225 Difference]: With dead ends: 351847 [2021-08-06 14:41:13,352 INFO L226 Difference]: Without dead ends: 351150 [2021-08-06 14:41:13,352 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 136.7ms TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:41:14,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351150 states. [2021-08-06 14:41:21,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351150 to 200392. [2021-08-06 14:41:21,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200392 states, 200391 states have (on average 3.6610077298880688) internal successors, (733633), 200391 states have internal predecessors, (733633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:41:24,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200392 states to 200392 states and 733633 transitions. [2021-08-06 14:41:24,253 INFO L78 Accepts]: Start accepts. Automaton has 200392 states and 733633 transitions. Word has length 75 [2021-08-06 14:41:24,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:41:24,253 INFO L470 AbstractCegarLoop]: Abstraction has 200392 states and 733633 transitions. [2021-08-06 14:41:24,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:41:24,253 INFO L276 IsEmpty]: Start isEmpty. Operand 200392 states and 733633 transitions. [2021-08-06 14:41:25,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-06 14:41:25,155 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:41:25,155 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, 1, 1, 1, 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 14:41:25,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-06 14:41:25,156 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:41:25,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:41:25,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1934888770, now seen corresponding path program 12 times [2021-08-06 14:41:25,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:41:25,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530869853] [2021-08-06 14:41:25,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:41:25,156 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:41:25,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:41:25,892 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 14:41:25,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:41:25,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530869853] [2021-08-06 14:41:25,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530869853] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:41:25,893 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:41:25,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-08-06 14:41:25,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604963717] [2021-08-06 14:41:25,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:41:25,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:41:25,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:41:25,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:41:25,894 INFO L87 Difference]: Start difference. First operand 200392 states and 733633 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:41:29,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:41:29,805 INFO L93 Difference]: Finished difference Result 249805 states and 913024 transitions. [2021-08-06 14:41:29,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:41:29,805 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-06 14:41:29,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:41:32,008 INFO L225 Difference]: With dead ends: 249805 [2021-08-06 14:41:32,008 INFO L226 Difference]: Without dead ends: 248918 [2021-08-06 14:41:32,009 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 212.3ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:41:32,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248918 states. [2021-08-06 14:41:38,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248918 to 207905. [2021-08-06 14:41:39,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207905 states, 207904 states have (on average 3.6588617823610896) internal successors, (760692), 207904 states have internal predecessors, (760692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:41:41,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207905 states to 207905 states and 760692 transitions. [2021-08-06 14:41:41,048 INFO L78 Accepts]: Start accepts. Automaton has 207905 states and 760692 transitions. Word has length 75 [2021-08-06 14:41:41,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:41:41,048 INFO L470 AbstractCegarLoop]: Abstraction has 207905 states and 760692 transitions. [2021-08-06 14:41:41,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:41:41,048 INFO L276 IsEmpty]: Start isEmpty. Operand 207905 states and 760692 transitions. [2021-08-06 14:41:42,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-06 14:41:42,590 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:41:42,590 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, 1, 1, 1, 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 14:41:42,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-06 14:41:42,590 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:41:42,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:41:42,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1303102432, now seen corresponding path program 13 times [2021-08-06 14:41:42,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:41:42,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453639158] [2021-08-06 14:41:42,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:41:42,591 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:41:42,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:41:42,995 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 14:41:42,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:41:42,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453639158] [2021-08-06 14:41:42,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453639158] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:41:42,996 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:41:42,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-08-06 14:41:42,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564589411] [2021-08-06 14:41:42,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:41:42,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:41:42,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:41:42,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:41:42,997 INFO L87 Difference]: Start difference. First operand 207905 states and 760692 transitions. Second operand has 15 states, 15 states have (on average 5.0) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:41:47,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:41:47,412 INFO L93 Difference]: Finished difference Result 269774 states and 985988 transitions. [2021-08-06 14:41:47,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:41:47,413 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-06 14:41:47,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:41:49,256 INFO L225 Difference]: With dead ends: 269774 [2021-08-06 14:41:49,257 INFO L226 Difference]: Without dead ends: 268862 [2021-08-06 14:41:49,257 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 530.6ms TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:41:49,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268862 states. [2021-08-06 14:41:56,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268862 to 208077. [2021-08-06 14:41:56,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208077 states, 208076 states have (on average 3.6588217766585287) internal successors, (761313), 208076 states have internal predecessors, (761313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:41:58,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208077 states to 208077 states and 761313 transitions. [2021-08-06 14:41:58,798 INFO L78 Accepts]: Start accepts. Automaton has 208077 states and 761313 transitions. Word has length 75 [2021-08-06 14:41:58,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:41:58,798 INFO L470 AbstractCegarLoop]: Abstraction has 208077 states and 761313 transitions. [2021-08-06 14:41:58,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:41:58,798 INFO L276 IsEmpty]: Start isEmpty. Operand 208077 states and 761313 transitions. [2021-08-06 14:42:00,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-06 14:42:00,006 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:42:00,006 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, 1, 1, 1, 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 14:42:00,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-06 14:42:00,006 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:42:00,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:42:00,007 INFO L82 PathProgramCache]: Analyzing trace with hash -977731590, now seen corresponding path program 14 times [2021-08-06 14:42:00,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:42:00,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4680995] [2021-08-06 14:42:00,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:42:00,007 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:42:00,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:42:00,513 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 14:42:00,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:42:00,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4680995] [2021-08-06 14:42:00,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4680995] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:42:00,513 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:42:00,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-08-06 14:42:00,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960563294] [2021-08-06 14:42:00,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:42:00,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:42:00,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:42:00,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:42:00,514 INFO L87 Difference]: Start difference. First operand 208077 states and 761313 transitions. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 11 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:42:04,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:42:04,363 INFO L93 Difference]: Finished difference Result 257177 states and 938269 transitions. [2021-08-06 14:42:04,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 14:42:04,364 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 11 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-06 14:42:04,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:42:06,514 INFO L225 Difference]: With dead ends: 257177 [2021-08-06 14:42:06,515 INFO L226 Difference]: Without dead ends: 255557 [2021-08-06 14:42:06,517 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 867.8ms TimeCoverageRelationStatistics Valid=225, Invalid=767, Unknown=0, NotChecked=0, Total=992 [2021-08-06 14:42:06,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255557 states. [2021-08-06 14:42:14,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255557 to 233662. [2021-08-06 14:42:14,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233662 states, 233661 states have (on average 3.65157214939592) internal successors, (853230), 233661 states have internal predecessors, (853230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:42:17,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233662 states to 233662 states and 853230 transitions. [2021-08-06 14:42:17,450 INFO L78 Accepts]: Start accepts. Automaton has 233662 states and 853230 transitions. Word has length 75 [2021-08-06 14:42:17,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:42:17,450 INFO L470 AbstractCegarLoop]: Abstraction has 233662 states and 853230 transitions. [2021-08-06 14:42:17,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 11 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:42:17,450 INFO L276 IsEmpty]: Start isEmpty. Operand 233662 states and 853230 transitions. [2021-08-06 14:42:18,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-06 14:42:18,358 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:42:18,358 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, 1, 1, 1, 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 14:42:18,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-06 14:42:18,359 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:42:18,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:42:18,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1412964060, now seen corresponding path program 15 times [2021-08-06 14:42:18,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:42:18,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504756669] [2021-08-06 14:42:18,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:42:18,360 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:42:18,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:42:19,243 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 14:42:19,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:42:19,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504756669] [2021-08-06 14:42:19,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504756669] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:42:19,243 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:42:19,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-08-06 14:42:19,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343162243] [2021-08-06 14:42:19,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:42:19,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:42:19,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:42:19,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:42:19,244 INFO L87 Difference]: Start difference. First operand 233662 states and 853230 transitions. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 11 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:42:22,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:42:22,110 INFO L93 Difference]: Finished difference Result 236732 states and 863343 transitions. [2021-08-06 14:42:22,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:42:22,121 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 11 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-06 14:42:22,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:42:23,148 INFO L225 Difference]: With dead ends: 236732 [2021-08-06 14:42:23,148 INFO L226 Difference]: Without dead ends: 234689 [2021-08-06 14:42:23,148 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 434.1ms TimeCoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:42:23,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234689 states. [2021-08-06 14:42:30,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234689 to 234482. [2021-08-06 14:42:31,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234482 states, 234481 states have (on average 3.6501678174351015) internal successors, (855895), 234481 states have internal predecessors, (855895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:42:34,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234482 states to 234482 states and 855895 transitions. [2021-08-06 14:42:34,776 INFO L78 Accepts]: Start accepts. Automaton has 234482 states and 855895 transitions. Word has length 75 [2021-08-06 14:42:34,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:42:34,777 INFO L470 AbstractCegarLoop]: Abstraction has 234482 states and 855895 transitions. [2021-08-06 14:42:34,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 11 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:42:34,777 INFO L276 IsEmpty]: Start isEmpty. Operand 234482 states and 855895 transitions. [2021-08-06 14:42:36,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-06 14:42:36,084 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:42:36,084 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, 1, 1, 1, 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 14:42:36,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-08-06 14:42:36,085 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:42:36,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:42:36,085 INFO L82 PathProgramCache]: Analyzing trace with hash -2110821628, now seen corresponding path program 16 times [2021-08-06 14:42:36,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:42:36,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979977288] [2021-08-06 14:42:36,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:42:36,085 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:42:36,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:42:36,737 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 14:42:36,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:42:36,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979977288] [2021-08-06 14:42:36,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979977288] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:42:36,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:42:36,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-08-06 14:42:36,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866880482] [2021-08-06 14:42:36,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:42:36,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:42:36,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:42:36,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:42:36,741 INFO L87 Difference]: Start difference. First operand 234482 states and 855895 transitions. Second operand has 15 states, 15 states have (on average 5.0) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:42:39,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:42:39,976 INFO L93 Difference]: Finished difference Result 236842 states and 863596 transitions. [2021-08-06 14:42:39,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:42:39,977 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-06 14:42:39,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:42:41,333 INFO L225 Difference]: With dead ends: 236842 [2021-08-06 14:42:41,333 INFO L226 Difference]: Without dead ends: 235366 [2021-08-06 14:42:41,333 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 619.9ms TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:42:42,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235366 states. [2021-08-06 14:42:48,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235366 to 234527. [2021-08-06 14:42:48,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234527 states, 234526 states have (on average 3.6502008306115314) internal successors, (856067), 234526 states have internal predecessors, (856067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:42:51,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234527 states to 234527 states and 856067 transitions. [2021-08-06 14:42:51,411 INFO L78 Accepts]: Start accepts. Automaton has 234527 states and 856067 transitions. Word has length 75 [2021-08-06 14:42:51,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:42:51,411 INFO L470 AbstractCegarLoop]: Abstraction has 234527 states and 856067 transitions. [2021-08-06 14:42:51,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:42:51,412 INFO L276 IsEmpty]: Start isEmpty. Operand 234527 states and 856067 transitions. [2021-08-06 14:42:52,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-06 14:42:52,522 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:42:52,522 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, 1, 1, 1, 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 14:42:52,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-08-06 14:42:52,523 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:42:52,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:42:52,523 INFO L82 PathProgramCache]: Analyzing trace with hash -221361626, now seen corresponding path program 17 times [2021-08-06 14:42:52,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:42:52,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983271407] [2021-08-06 14:42:52,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:42:52,530 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:42:52,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:42:52,870 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 14:42:52,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:42:52,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983271407] [2021-08-06 14:42:52,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983271407] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:42:52,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:42:52,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-08-06 14:42:52,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056291243] [2021-08-06 14:42:52,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:42:52,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:42:52,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:42:52,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:42:52,871 INFO L87 Difference]: Start difference. First operand 234527 states and 856067 transitions. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 11 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:42:56,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:42:56,332 INFO L93 Difference]: Finished difference Result 237872 states and 867062 transitions. [2021-08-06 14:42:56,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:42:56,333 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 11 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-06 14:42:56,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:42:57,733 INFO L225 Difference]: With dead ends: 237872 [2021-08-06 14:42:57,733 INFO L226 Difference]: Without dead ends: 235496 [2021-08-06 14:42:57,733 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 462.7ms TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:42:58,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235496 states. [2021-08-06 14:43:05,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235496 to 233483. [2021-08-06 14:43:06,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233483 states, 233482 states have (on average 3.6516647964297033) internal successors, (852598), 233482 states have internal predecessors, (852598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:43:08,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233483 states to 233483 states and 852598 transitions. [2021-08-06 14:43:08,180 INFO L78 Accepts]: Start accepts. Automaton has 233483 states and 852598 transitions. Word has length 75 [2021-08-06 14:43:08,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:43:08,181 INFO L470 AbstractCegarLoop]: Abstraction has 233483 states and 852598 transitions. [2021-08-06 14:43:08,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 11 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:43:08,181 INFO L276 IsEmpty]: Start isEmpty. Operand 233483 states and 852598 transitions. [2021-08-06 14:43:09,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-06 14:43:09,331 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:43:09,331 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, 1, 1, 1, 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 14:43:09,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-08-06 14:43:09,331 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:43:09,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:43:09,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1853259638, now seen corresponding path program 18 times [2021-08-06 14:43:09,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:43:09,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713847438] [2021-08-06 14:43:09,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:43:09,332 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:43:09,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:43:09,528 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 14:43:09,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:43:09,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713847438] [2021-08-06 14:43:09,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713847438] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:43:09,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:43:09,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-08-06 14:43:09,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878344122] [2021-08-06 14:43:09,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:43:09,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:43:09,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:43:09,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:43:09,530 INFO L87 Difference]: Start difference. First operand 233483 states and 852598 transitions. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 11 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:43:13,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:43:13,642 INFO L93 Difference]: Finished difference Result 325920 states and 1177171 transitions. [2021-08-06 14:43:13,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 14:43:13,643 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 11 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-06 14:43:13,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:43:15,699 INFO L225 Difference]: With dead ends: 325920 [2021-08-06 14:43:15,699 INFO L226 Difference]: Without dead ends: 325920 [2021-08-06 14:43:15,699 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 630.9ms TimeCoverageRelationStatistics Valid=218, Invalid=652, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:43:16,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325920 states. [2021-08-06 14:43:26,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325920 to 271508. [2021-08-06 14:43:26,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271508 states, 271507 states have (on average 3.635195409326463) internal successors, (986981), 271507 states have internal predecessors, (986981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:43:28,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271508 states to 271508 states and 986981 transitions. [2021-08-06 14:43:28,807 INFO L78 Accepts]: Start accepts. Automaton has 271508 states and 986981 transitions. Word has length 75 [2021-08-06 14:43:28,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:43:28,808 INFO L470 AbstractCegarLoop]: Abstraction has 271508 states and 986981 transitions. [2021-08-06 14:43:28,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 11 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:43:28,808 INFO L276 IsEmpty]: Start isEmpty. Operand 271508 states and 986981 transitions. [2021-08-06 14:43:29,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-06 14:43:29,888 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:43:29,888 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, 1, 1, 1, 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 14:43:29,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-08-06 14:43:29,888 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:43:29,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:43:29,889 INFO L82 PathProgramCache]: Analyzing trace with hash 460542448, now seen corresponding path program 19 times [2021-08-06 14:43:29,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:43:29,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743743614] [2021-08-06 14:43:29,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:43:29,889 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:43:29,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:43:29,991 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 14:43:29,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:43:29,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743743614] [2021-08-06 14:43:29,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743743614] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:43:29,992 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:43:29,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-08-06 14:43:29,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085746608] [2021-08-06 14:43:29,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:43:29,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:43:29,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:43:29,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:43:29,993 INFO L87 Difference]: Start difference. First operand 271508 states and 986981 transitions. Second operand has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:43:33,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:43:33,382 INFO L93 Difference]: Finished difference Result 325111 states and 1166736 transitions. [2021-08-06 14:43:33,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:43:33,382 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-06 14:43:33,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:43:35,446 INFO L225 Difference]: With dead ends: 325111 [2021-08-06 14:43:35,447 INFO L226 Difference]: Without dead ends: 321578 [2021-08-06 14:43:35,447 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 154.8ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:43:36,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321578 states. [2021-08-06 14:43:45,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321578 to 275720. [2021-08-06 14:43:45,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275720 states, 275719 states have (on average 3.6290462391057563) internal successors, (1000597), 275719 states have internal predecessors, (1000597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:43:47,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275720 states to 275720 states and 1000597 transitions. [2021-08-06 14:43:47,751 INFO L78 Accepts]: Start accepts. Automaton has 275720 states and 1000597 transitions. Word has length 75 [2021-08-06 14:43:47,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:43:47,751 INFO L470 AbstractCegarLoop]: Abstraction has 275720 states and 1000597 transitions. [2021-08-06 14:43:47,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:43:47,752 INFO L276 IsEmpty]: Start isEmpty. Operand 275720 states and 1000597 transitions. [2021-08-06 14:43:48,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-06 14:43:48,848 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:43:48,848 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, 1, 1, 1, 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 14:43:48,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-08-06 14:43:48,848 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:43:48,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:43:48,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1225187670, now seen corresponding path program 20 times [2021-08-06 14:43:48,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:43:48,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373767684] [2021-08-06 14:43:48,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:43:48,849 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:43:48,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:43:49,025 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 14:43:49,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:43:49,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373767684] [2021-08-06 14:43:49,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373767684] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:43:49,026 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:43:49,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-08-06 14:43:49,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41275453] [2021-08-06 14:43:49,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 14:43:49,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:43:49,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 14:43:49,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:43:49,027 INFO L87 Difference]: Start difference. First operand 275720 states and 1000597 transitions. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 11 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:43:55,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:43:55,485 INFO L93 Difference]: Finished difference Result 543933 states and 1966079 transitions. [2021-08-06 14:43:55,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:43:55,505 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 11 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-06 14:43:55,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:44:00,651 INFO L225 Difference]: With dead ends: 543933 [2021-08-06 14:44:00,651 INFO L226 Difference]: Without dead ends: 532769 [2021-08-06 14:44:00,652 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 170.4ms TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:44:02,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532769 states. [2021-08-06 14:44:14,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532769 to 284915. [2021-08-06 14:44:14,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284915 states, 284914 states have (on average 3.6231985792203965) internal successors, (1032300), 284914 states have internal predecessors, (1032300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:44:17,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284915 states to 284915 states and 1032300 transitions. [2021-08-06 14:44:17,084 INFO L78 Accepts]: Start accepts. Automaton has 284915 states and 1032300 transitions. Word has length 75 [2021-08-06 14:44:17,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:44:17,084 INFO L470 AbstractCegarLoop]: Abstraction has 284915 states and 1032300 transitions. [2021-08-06 14:44:17,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 11 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:44:17,084 INFO L276 IsEmpty]: Start isEmpty. Operand 284915 states and 1032300 transitions. [2021-08-06 14:44:19,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-06 14:44:19,009 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:44:19,009 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, 1, 1, 1, 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 14:44:19,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-08-06 14:44:19,009 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:44:19,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:44:19,010 INFO L82 PathProgramCache]: Analyzing trace with hash -729849784, now seen corresponding path program 21 times [2021-08-06 14:44:19,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:44:19,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102257213] [2021-08-06 14:44:19,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:44:19,010 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:44:19,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:44:19,798 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 14:44:19,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:44:19,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102257213] [2021-08-06 14:44:19,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102257213] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:44:19,798 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:44:19,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-08-06 14:44:19,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67384825] [2021-08-06 14:44:19,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:44:19,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:44:19,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:44:19,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:44:19,799 INFO L87 Difference]: Start difference. First operand 284915 states and 1032300 transitions. Second operand has 15 states, 15 states have (on average 5.0) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:44:23,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:44:23,629 INFO L93 Difference]: Finished difference Result 311324 states and 1117424 transitions. [2021-08-06 14:44:23,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 14:44:23,630 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-06 14:44:23,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:44:27,225 INFO L225 Difference]: With dead ends: 311324 [2021-08-06 14:44:27,225 INFO L226 Difference]: Without dead ends: 309904 [2021-08-06 14:44:27,225 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 448.7ms TimeCoverageRelationStatistics Valid=234, Invalid=822, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 14:44:28,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309904 states.