/usr/bin/java -Xmx16000000000 -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/security.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 21:22:55,690 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 21:22:55,692 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 21:22:55,721 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-10 21:22:55,761 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 [2021-03-10 21:22:55,788 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 21:22:55,788 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 21:22:55,789 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 21:22:55,789 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 21:22:55,791 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 21:22:55,791 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 21:22:55,791 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 21:22:55,791 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 21:22:55,791 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 21:22:55,791 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 21:22:55,792 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 21:22:55,792 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 21:22:55,792 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 21:22:55,792 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 21:22:55,792 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 21:22:55,792 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 21:22:55,792 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 21:22:55,792 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 21:22:55,793 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 21:22:55,793 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 21:22:55,793 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 21:22:55,793 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 21:22:55,793 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 21:22:55,793 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 21:22:55,793 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 21:22:55,793 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 21:22:55,793 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 21:22:55,793 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 21:22:55,794 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 21:22:55,794 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 21:22:55,794 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 21:22:55,794 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 21:22:56,001 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 21:22:56,020 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 21:22:56,021 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 21:22:56,022 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 21:22:56,025 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 21:22:56,025 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/security.wvr.bpl [2021-03-10 21:22:56,026 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/security.wvr.bpl' [2021-03-10 21:22:56,054 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 21:22:56,058 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 21:22:56,059 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 21:22:56,060 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 21:22:56,060 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 21:22:56,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:22:56" (1/1) ... [2021-03-10 21:22:56,072 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:22:56" (1/1) ... [2021-03-10 21:22:56,077 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 21:22:56,077 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 21:22:56,077 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 21:22:56,077 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 21:22:56,082 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:22:56" (1/1) ... [2021-03-10 21:22:56,082 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:22:56" (1/1) ... [2021-03-10 21:22:56,082 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:22:56" (1/1) ... [2021-03-10 21:22:56,083 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:22:56" (1/1) ... [2021-03-10 21:22:56,084 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:22:56" (1/1) ... [2021-03-10 21:22:56,085 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:22:56" (1/1) ... [2021-03-10 21:22:56,086 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:22:56" (1/1) ... [2021-03-10 21:22:56,086 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 21:22:56,087 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 21:22:56,087 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 21:22:56,087 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 21:22:56,089 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:22:56" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 21:22:56,140 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-10 21:22:56,140 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-10 21:22:56,140 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-10 21:22:56,140 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-10 21:22:56,140 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-10 21:22:56,140 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-10 21:22:56,141 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-10 21:22:56,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 21:22:56,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 21:22:56,142 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 21:22:56,242 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 21:22:56,242 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-10 21:22:56,243 INFO L202 PluginConnector]: Adding new model security.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 09:22:56 BoogieIcfgContainer [2021-03-10 21:22:56,243 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 21:22:56,244 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 21:22:56,244 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 21:22:56,246 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 21:22:56,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:22:56" (1/2) ... [2021-03-10 21:22:56,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5caabad9 and model type security.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 09:22:56, skipping insertion in model container [2021-03-10 21:22:56,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 09:22:56" (2/2) ... [2021-03-10 21:22:56,247 INFO L111 eAbstractionObserver]: Analyzing ICFG security.wvr.bpl [2021-03-10 21:22:56,251 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 21:22:56,251 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 21:22:56,253 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 21:22:56,253 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 21:22:56,271 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-03-10 21:22:56,281 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-10 21:22:56,292 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 21:22:56,293 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 21:22:56,293 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 21:22:56,293 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 21:22:56,293 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 21:22:56,293 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 21:22:56,293 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 21:22:56,293 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 21:22:56,298 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 28 transitions, 72 flow [2021-03-10 21:22:56,308 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 86 states, 84 states have (on average 2.1904761904761907) internal successors, (184), 85 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:56,310 INFO L276 IsEmpty]: Start isEmpty. Operand has 86 states, 84 states have (on average 2.1904761904761907) internal successors, (184), 85 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:56,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:22:56,315 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:56,315 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:56,315 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:56,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:56,319 INFO L82 PathProgramCache]: Analyzing trace with hash 515368400, now seen corresponding path program 1 times [2021-03-10 21:22:56,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:56,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447749562] [2021-03-10 21:22:56,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:56,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:56,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:56,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447749562] [2021-03-10 21:22:56,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:22:56,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 21:22:56,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377800677] [2021-03-10 21:22:56,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-10 21:22:56,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:56,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-10 21:22:56,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 21:22:56,410 INFO L87 Difference]: Start difference. First operand has 86 states, 84 states have (on average 2.1904761904761907) internal successors, (184), 85 states have internal predecessors, (184), 0 states have call successors, (0), 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 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:56,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:56,434 INFO L93 Difference]: Finished difference Result 131 states and 269 transitions. [2021-03-10 21:22:56,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 21:22:56,435 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:22:56,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:56,441 INFO L225 Difference]: With dead ends: 131 [2021-03-10 21:22:56,441 INFO L226 Difference]: Without dead ends: 131 [2021-03-10 21:22:56,442 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 21:22:56,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-03-10 21:22:56,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 93. [2021-03-10 21:22:56,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.1847826086956523) internal successors, (201), 92 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:56,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 201 transitions. [2021-03-10 21:22:56,468 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 201 transitions. Word has length 16 [2021-03-10 21:22:56,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:56,468 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 201 transitions. [2021-03-10 21:22:56,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:56,468 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 201 transitions. [2021-03-10 21:22:56,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:22:56,469 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:56,469 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:56,469 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 21:22:56,469 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:56,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:56,470 INFO L82 PathProgramCache]: Analyzing trace with hash 2051020952, now seen corresponding path program 1 times [2021-03-10 21:22:56,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:56,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433424593] [2021-03-10 21:22:56,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:56,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:56,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:56,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433424593] [2021-03-10 21:22:56,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:22:56,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 21:22:56,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296842251] [2021-03-10 21:22:56,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-10 21:22:56,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:56,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-10 21:22:56,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 21:22:56,489 INFO L87 Difference]: Start difference. First operand 93 states and 201 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:56,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:56,499 INFO L93 Difference]: Finished difference Result 136 states and 278 transitions. [2021-03-10 21:22:56,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 21:22:56,499 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:22:56,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:56,500 INFO L225 Difference]: With dead ends: 136 [2021-03-10 21:22:56,500 INFO L226 Difference]: Without dead ends: 136 [2021-03-10 21:22:56,501 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 21:22:56,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-03-10 21:22:56,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 103. [2021-03-10 21:22:56,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.176470588235294) internal successors, (222), 102 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:56,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 222 transitions. [2021-03-10 21:22:56,509 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 222 transitions. Word has length 17 [2021-03-10 21:22:56,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:56,509 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 222 transitions. [2021-03-10 21:22:56,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:56,509 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 222 transitions. [2021-03-10 21:22:56,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:22:56,510 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:56,510 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:56,510 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-10 21:22:56,510 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:56,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:56,511 INFO L82 PathProgramCache]: Analyzing trace with hash -124034957, now seen corresponding path program 1 times [2021-03-10 21:22:56,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:56,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606873508] [2021-03-10 21:22:56,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:56,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:56,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:56,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606873508] [2021-03-10 21:22:56,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:22:56,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-10 21:22:56,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372627824] [2021-03-10 21:22:56,586 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 21:22:56,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:56,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 21:22:56,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:22:56,587 INFO L87 Difference]: Start difference. First operand 103 states and 222 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:56,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:56,675 INFO L93 Difference]: Finished difference Result 171 states and 344 transitions. [2021-03-10 21:22:56,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 21:22:56,676 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:22:56,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:56,677 INFO L225 Difference]: With dead ends: 171 [2021-03-10 21:22:56,677 INFO L226 Difference]: Without dead ends: 161 [2021-03-10 21:22:56,677 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 78.6ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:22:56,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-03-10 21:22:56,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 118. [2021-03-10 21:22:56,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.1538461538461537) internal successors, (252), 117 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:56,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 252 transitions. [2021-03-10 21:22:56,686 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 252 transitions. Word has length 18 [2021-03-10 21:22:56,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:56,686 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 252 transitions. [2021-03-10 21:22:56,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:56,686 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 252 transitions. [2021-03-10 21:22:56,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:22:56,687 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:56,687 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:56,687 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-10 21:22:56,687 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:56,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:56,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1760059086, now seen corresponding path program 1 times [2021-03-10 21:22:56,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:56,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477801446] [2021-03-10 21:22:56,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:56,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:56,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:56,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477801446] [2021-03-10 21:22:56,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:22:56,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:22:56,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35765586] [2021-03-10 21:22:56,795 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:22:56,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:56,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:22:56,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:22:56,798 INFO L87 Difference]: Start difference. First operand 118 states and 252 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:56,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:56,928 INFO L93 Difference]: Finished difference Result 189 states and 374 transitions. [2021-03-10 21:22:56,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:22:56,929 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:22:56,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:56,932 INFO L225 Difference]: With dead ends: 189 [2021-03-10 21:22:56,932 INFO L226 Difference]: Without dead ends: 156 [2021-03-10 21:22:56,933 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 113.9ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:22:56,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-03-10 21:22:56,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 113. [2021-03-10 21:22:56,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.1607142857142856) internal successors, (242), 112 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:56,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 242 transitions. [2021-03-10 21:22:56,951 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 242 transitions. Word has length 18 [2021-03-10 21:22:56,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:56,952 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 242 transitions. [2021-03-10 21:22:56,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:56,952 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 242 transitions. [2021-03-10 21:22:56,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:22:56,952 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:56,953 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:56,953 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-10 21:22:56,953 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:56,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:56,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1024175242, now seen corresponding path program 2 times [2021-03-10 21:22:56,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:56,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166108346] [2021-03-10 21:22:56,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:56,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:57,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:57,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166108346] [2021-03-10 21:22:57,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:22:57,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:22:57,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342817060] [2021-03-10 21:22:57,020 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:22:57,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:57,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:22:57,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:22:57,022 INFO L87 Difference]: Start difference. First operand 113 states and 242 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:57,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:57,106 INFO L93 Difference]: Finished difference Result 217 states and 436 transitions. [2021-03-10 21:22:57,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:22:57,107 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:22:57,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:57,108 INFO L225 Difference]: With dead ends: 217 [2021-03-10 21:22:57,108 INFO L226 Difference]: Without dead ends: 189 [2021-03-10 21:22:57,112 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 70.2ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:22:57,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-03-10 21:22:57,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 126. [2021-03-10 21:22:57,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.176) internal successors, (272), 125 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:57,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 272 transitions. [2021-03-10 21:22:57,128 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 272 transitions. Word has length 18 [2021-03-10 21:22:57,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:57,128 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 272 transitions. [2021-03-10 21:22:57,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:57,128 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 272 transitions. [2021-03-10 21:22:57,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:22:57,129 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:57,129 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:57,132 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-10 21:22:57,132 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:57,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:57,133 INFO L82 PathProgramCache]: Analyzing trace with hash -140139653, now seen corresponding path program 2 times [2021-03-10 21:22:57,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:57,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991766676] [2021-03-10 21:22:57,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:57,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:57,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:57,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991766676] [2021-03-10 21:22:57,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:22:57,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-10 21:22:57,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274802219] [2021-03-10 21:22:57,195 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 21:22:57,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:57,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 21:22:57,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:22:57,196 INFO L87 Difference]: Start difference. First operand 126 states and 272 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:57,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:57,248 INFO L93 Difference]: Finished difference Result 208 states and 418 transitions. [2021-03-10 21:22:57,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 21:22:57,248 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:22:57,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:57,249 INFO L225 Difference]: With dead ends: 208 [2021-03-10 21:22:57,249 INFO L226 Difference]: Without dead ends: 199 [2021-03-10 21:22:57,249 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.0ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:22:57,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-03-10 21:22:57,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 130. [2021-03-10 21:22:57,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.193798449612403) internal successors, (283), 129 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:57,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 283 transitions. [2021-03-10 21:22:57,253 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 283 transitions. Word has length 18 [2021-03-10 21:22:57,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:57,253 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 283 transitions. [2021-03-10 21:22:57,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:57,253 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 283 transitions. [2021-03-10 21:22:57,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:22:57,254 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:57,254 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:57,254 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-10 21:22:57,254 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:57,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:57,255 INFO L82 PathProgramCache]: Analyzing trace with hash 753224345, now seen corresponding path program 3 times [2021-03-10 21:22:57,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:57,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540223548] [2021-03-10 21:22:57,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:57,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:57,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:57,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540223548] [2021-03-10 21:22:57,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:22:57,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-10 21:22:57,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685599984] [2021-03-10 21:22:57,287 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 21:22:57,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:57,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 21:22:57,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:22:57,288 INFO L87 Difference]: Start difference. First operand 130 states and 283 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:57,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:57,334 INFO L93 Difference]: Finished difference Result 200 states and 407 transitions. [2021-03-10 21:22:57,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 21:22:57,335 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:22:57,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:57,336 INFO L225 Difference]: With dead ends: 200 [2021-03-10 21:22:57,336 INFO L226 Difference]: Without dead ends: 186 [2021-03-10 21:22:57,336 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.2ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:22:57,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-03-10 21:22:57,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 123. [2021-03-10 21:22:57,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.19672131147541) internal successors, (268), 122 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:57,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 268 transitions. [2021-03-10 21:22:57,341 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 268 transitions. Word has length 18 [2021-03-10 21:22:57,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:57,341 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 268 transitions. [2021-03-10 21:22:57,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:57,341 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 268 transitions. [2021-03-10 21:22:57,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:22:57,344 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:57,344 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:57,344 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-10 21:22:57,344 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:57,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:57,345 INFO L82 PathProgramCache]: Analyzing trace with hash 353908316, now seen corresponding path program 3 times [2021-03-10 21:22:57,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:57,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807368928] [2021-03-10 21:22:57,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:57,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:57,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:57,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807368928] [2021-03-10 21:22:57,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:22:57,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:22:57,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563964849] [2021-03-10 21:22:57,414 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:22:57,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:57,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:22:57,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:22:57,415 INFO L87 Difference]: Start difference. First operand 123 states and 268 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:57,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:57,521 INFO L93 Difference]: Finished difference Result 217 states and 431 transitions. [2021-03-10 21:22:57,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:22:57,522 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:22:57,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:57,523 INFO L225 Difference]: With dead ends: 217 [2021-03-10 21:22:57,523 INFO L226 Difference]: Without dead ends: 208 [2021-03-10 21:22:57,523 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 88.8ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:22:57,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-03-10 21:22:57,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 125. [2021-03-10 21:22:57,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.193548387096774) internal successors, (272), 124 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:57,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 272 transitions. [2021-03-10 21:22:57,526 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 272 transitions. Word has length 18 [2021-03-10 21:22:57,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:57,527 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 272 transitions. [2021-03-10 21:22:57,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:57,527 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 272 transitions. [2021-03-10 21:22:57,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:22:57,527 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:57,527 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:57,527 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-10 21:22:57,528 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:57,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:57,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1247272314, now seen corresponding path program 4 times [2021-03-10 21:22:57,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:57,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603125083] [2021-03-10 21:22:57,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:57,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:57,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:57,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603125083] [2021-03-10 21:22:57,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:22:57,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:22:57,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502239219] [2021-03-10 21:22:57,572 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:22:57,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:57,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:22:57,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:22:57,573 INFO L87 Difference]: Start difference. First operand 125 states and 272 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:57,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:57,669 INFO L93 Difference]: Finished difference Result 210 states and 422 transitions. [2021-03-10 21:22:57,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:22:57,669 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:22:57,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:57,670 INFO L225 Difference]: With dead ends: 210 [2021-03-10 21:22:57,670 INFO L226 Difference]: Without dead ends: 191 [2021-03-10 21:22:57,670 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 90.2ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:22:57,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-03-10 21:22:57,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 110. [2021-03-10 21:22:57,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.18348623853211) internal successors, (238), 109 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:57,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 238 transitions. [2021-03-10 21:22:57,673 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 238 transitions. Word has length 18 [2021-03-10 21:22:57,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:57,673 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 238 transitions. [2021-03-10 21:22:57,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:57,673 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 238 transitions. [2021-03-10 21:22:57,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:22:57,674 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:57,674 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:57,674 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-03-10 21:22:57,674 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:57,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:57,674 INFO L82 PathProgramCache]: Analyzing trace with hash -62451926, now seen corresponding path program 5 times [2021-03-10 21:22:57,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:57,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457864357] [2021-03-10 21:22:57,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:57,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:57,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:57,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457864357] [2021-03-10 21:22:57,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:22:57,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:22:57,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110346728] [2021-03-10 21:22:57,713 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:22:57,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:57,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:22:57,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:22:57,714 INFO L87 Difference]: Start difference. First operand 110 states and 238 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:57,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:57,781 INFO L93 Difference]: Finished difference Result 164 states and 328 transitions. [2021-03-10 21:22:57,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:22:57,782 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:22:57,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:57,782 INFO L225 Difference]: With dead ends: 164 [2021-03-10 21:22:57,782 INFO L226 Difference]: Without dead ends: 136 [2021-03-10 21:22:57,783 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 66.7ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:22:57,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-03-10 21:22:57,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 110. [2021-03-10 21:22:57,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.1376146788990824) internal successors, (233), 109 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:57,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 233 transitions. [2021-03-10 21:22:57,785 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 233 transitions. Word has length 18 [2021-03-10 21:22:57,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:57,786 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 233 transitions. [2021-03-10 21:22:57,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:57,786 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 233 transitions. [2021-03-10 21:22:57,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:22:57,786 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:57,786 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:57,786 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-03-10 21:22:57,786 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:57,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:57,787 INFO L82 PathProgramCache]: Analyzing trace with hash -732718852, now seen corresponding path program 6 times [2021-03-10 21:22:57,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:57,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019060215] [2021-03-10 21:22:57,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:57,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:57,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:57,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019060215] [2021-03-10 21:22:57,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:22:57,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:22:57,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715451297] [2021-03-10 21:22:57,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:22:57,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:57,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:22:57,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:22:57,827 INFO L87 Difference]: Start difference. First operand 110 states and 233 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:57,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:57,904 INFO L93 Difference]: Finished difference Result 169 states and 326 transitions. [2021-03-10 21:22:57,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:22:57,904 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:22:57,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:57,905 INFO L225 Difference]: With dead ends: 169 [2021-03-10 21:22:57,905 INFO L226 Difference]: Without dead ends: 160 [2021-03-10 21:22:57,905 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 69.3ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:22:57,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-03-10 21:22:57,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 112. [2021-03-10 21:22:57,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.135135135135135) internal successors, (237), 111 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:57,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 237 transitions. [2021-03-10 21:22:57,908 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 237 transitions. Word has length 18 [2021-03-10 21:22:57,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:57,933 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 237 transitions. [2021-03-10 21:22:57,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:57,933 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 237 transitions. [2021-03-10 21:22:57,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:22:57,934 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:57,934 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:57,934 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-03-10 21:22:57,934 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:57,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:57,934 INFO L82 PathProgramCache]: Analyzing trace with hash 160645146, now seen corresponding path program 7 times [2021-03-10 21:22:57,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:57,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132296237] [2021-03-10 21:22:57,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:57,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:57,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:57,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132296237] [2021-03-10 21:22:57,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:22:57,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:22:57,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171911515] [2021-03-10 21:22:57,977 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:22:57,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:57,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:22:57,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:22:57,977 INFO L87 Difference]: Start difference. First operand 112 states and 237 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:58,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:58,046 INFO L93 Difference]: Finished difference Result 156 states and 307 transitions. [2021-03-10 21:22:58,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:22:58,046 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:22:58,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:58,047 INFO L225 Difference]: With dead ends: 156 [2021-03-10 21:22:58,047 INFO L226 Difference]: Without dead ends: 139 [2021-03-10 21:22:58,047 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 66.0ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:22:58,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-03-10 21:22:58,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 101. [2021-03-10 21:22:58,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.1) internal successors, (210), 100 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:58,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 210 transitions. [2021-03-10 21:22:58,049 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 210 transitions. Word has length 18 [2021-03-10 21:22:58,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:58,049 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 210 transitions. [2021-03-10 21:22:58,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:58,050 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 210 transitions. [2021-03-10 21:22:58,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:22:58,050 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:58,050 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:58,050 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-03-10 21:22:58,050 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:58,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:58,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1835169953, now seen corresponding path program 4 times [2021-03-10 21:22:58,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:58,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628709868] [2021-03-10 21:22:58,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:58,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:58,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:58,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628709868] [2021-03-10 21:22:58,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:22:58,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-10 21:22:58,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921061344] [2021-03-10 21:22:58,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 21:22:58,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:58,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 21:22:58,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:22:58,079 INFO L87 Difference]: Start difference. First operand 101 states and 210 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:58,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:58,119 INFO L93 Difference]: Finished difference Result 156 states and 303 transitions. [2021-03-10 21:22:58,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 21:22:58,120 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:22:58,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:58,120 INFO L225 Difference]: With dead ends: 156 [2021-03-10 21:22:58,120 INFO L226 Difference]: Without dead ends: 147 [2021-03-10 21:22:58,120 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.9ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:22:58,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-03-10 21:22:58,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 110. [2021-03-10 21:22:58,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.091743119266055) internal successors, (228), 109 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:58,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 228 transitions. [2021-03-10 21:22:58,123 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 228 transitions. Word has length 18 [2021-03-10 21:22:58,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:58,123 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 228 transitions. [2021-03-10 21:22:58,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:58,123 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 228 transitions. [2021-03-10 21:22:58,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:22:58,124 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:58,124 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:58,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-03-10 21:22:58,124 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:58,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:58,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1156500989, now seen corresponding path program 5 times [2021-03-10 21:22:58,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:58,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639539495] [2021-03-10 21:22:58,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:58,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:58,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:58,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639539495] [2021-03-10 21:22:58,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:22:58,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-10 21:22:58,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941768343] [2021-03-10 21:22:58,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 21:22:58,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:58,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 21:22:58,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:22:58,151 INFO L87 Difference]: Start difference. First operand 110 states and 228 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:58,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:58,213 INFO L93 Difference]: Finished difference Result 175 states and 330 transitions. [2021-03-10 21:22:58,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 21:22:58,214 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:22:58,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:58,214 INFO L225 Difference]: With dead ends: 175 [2021-03-10 21:22:58,214 INFO L226 Difference]: Without dead ends: 166 [2021-03-10 21:22:58,215 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:22:58,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-03-10 21:22:58,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 112. [2021-03-10 21:22:58,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.09009009009009) internal successors, (232), 111 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:58,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 232 transitions. [2021-03-10 21:22:58,217 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 232 transitions. Word has length 18 [2021-03-10 21:22:58,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:58,217 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 232 transitions. [2021-03-10 21:22:58,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:58,217 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 232 transitions. [2021-03-10 21:22:58,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:22:58,218 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:58,218 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:58,218 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-03-10 21:22:58,218 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:58,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:58,218 INFO L82 PathProgramCache]: Analyzing trace with hash 774326845, now seen corresponding path program 6 times [2021-03-10 21:22:58,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:58,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499566133] [2021-03-10 21:22:58,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:58,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:58,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:58,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499566133] [2021-03-10 21:22:58,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:22:58,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-10 21:22:58,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144512328] [2021-03-10 21:22:58,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 21:22:58,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:58,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 21:22:58,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:22:58,245 INFO L87 Difference]: Start difference. First operand 112 states and 232 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:58,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:58,287 INFO L93 Difference]: Finished difference Result 160 states and 308 transitions. [2021-03-10 21:22:58,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 21:22:58,288 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:22:58,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:58,288 INFO L225 Difference]: With dead ends: 160 [2021-03-10 21:22:58,288 INFO L226 Difference]: Without dead ends: 145 [2021-03-10 21:22:58,288 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.0ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:22:58,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-03-10 21:22:58,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 105. [2021-03-10 21:22:58,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0865384615384617) internal successors, (217), 104 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:58,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 217 transitions. [2021-03-10 21:22:58,290 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 217 transitions. Word has length 18 [2021-03-10 21:22:58,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:58,291 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 217 transitions. [2021-03-10 21:22:58,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:58,291 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 217 transitions. [2021-03-10 21:22:58,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:22:58,291 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:58,291 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:58,291 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-03-10 21:22:58,291 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:58,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:58,291 INFO L82 PathProgramCache]: Analyzing trace with hash 498525696, now seen corresponding path program 8 times [2021-03-10 21:22:58,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:58,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322836563] [2021-03-10 21:22:58,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:58,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:58,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:58,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322836563] [2021-03-10 21:22:58,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:22:58,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:22:58,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348111050] [2021-03-10 21:22:58,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:22:58,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:58,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:22:58,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:22:58,327 INFO L87 Difference]: Start difference. First operand 105 states and 217 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:58,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:58,389 INFO L93 Difference]: Finished difference Result 129 states and 257 transitions. [2021-03-10 21:22:58,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:22:58,389 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:22:58,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:58,390 INFO L225 Difference]: With dead ends: 129 [2021-03-10 21:22:58,390 INFO L226 Difference]: Without dead ends: 120 [2021-03-10 21:22:58,390 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 61.2ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:22:58,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-03-10 21:22:58,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 99. [2021-03-10 21:22:58,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.1020408163265305) internal successors, (206), 98 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:58,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 206 transitions. [2021-03-10 21:22:58,392 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 206 transitions. Word has length 18 [2021-03-10 21:22:58,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:58,392 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 206 transitions. [2021-03-10 21:22:58,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:58,392 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 206 transitions. [2021-03-10 21:22:58,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:22:58,392 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:58,392 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:58,393 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-03-10 21:22:58,393 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:58,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:58,393 INFO L82 PathProgramCache]: Analyzing trace with hash -804770658, now seen corresponding path program 9 times [2021-03-10 21:22:58,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:58,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089606446] [2021-03-10 21:22:58,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:58,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:58,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:58,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089606446] [2021-03-10 21:22:58,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:22:58,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:22:58,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988471281] [2021-03-10 21:22:58,450 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:22:58,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:58,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:22:58,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:22:58,451 INFO L87 Difference]: Start difference. First operand 99 states and 206 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:58,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:58,525 INFO L93 Difference]: Finished difference Result 144 states and 278 transitions. [2021-03-10 21:22:58,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:22:58,526 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:22:58,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:58,526 INFO L225 Difference]: With dead ends: 144 [2021-03-10 21:22:58,526 INFO L226 Difference]: Without dead ends: 135 [2021-03-10 21:22:58,527 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 66.8ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:22:58,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-03-10 21:22:58,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 98. [2021-03-10 21:22:58,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.082474226804124) internal successors, (202), 97 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:58,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 202 transitions. [2021-03-10 21:22:58,529 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 202 transitions. Word has length 18 [2021-03-10 21:22:58,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:58,529 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 202 transitions. [2021-03-10 21:22:58,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:58,529 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 202 transitions. [2021-03-10 21:22:58,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:22:58,529 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:58,530 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:58,530 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-03-10 21:22:58,530 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:58,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:58,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1186944802, now seen corresponding path program 10 times [2021-03-10 21:22:58,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:58,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150627938] [2021-03-10 21:22:58,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:58,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:58,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:58,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150627938] [2021-03-10 21:22:58,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:22:58,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:22:58,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919858245] [2021-03-10 21:22:58,569 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:22:58,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:58,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:22:58,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:22:58,569 INFO L87 Difference]: Start difference. First operand 98 states and 202 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:58,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:58,635 INFO L93 Difference]: Finished difference Result 127 states and 253 transitions. [2021-03-10 21:22:58,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:22:58,636 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:22:58,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:58,636 INFO L225 Difference]: With dead ends: 127 [2021-03-10 21:22:58,636 INFO L226 Difference]: Without dead ends: 116 [2021-03-10 21:22:58,637 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 66.6ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:22:58,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-03-10 21:22:58,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 93. [2021-03-10 21:22:58,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.0760869565217392) internal successors, (191), 92 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:58,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 191 transitions. [2021-03-10 21:22:58,639 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 191 transitions. Word has length 18 [2021-03-10 21:22:58,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:58,639 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 191 transitions. [2021-03-10 21:22:58,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:58,639 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 191 transitions. [2021-03-10 21:22:58,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:22:58,640 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:58,640 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:58,640 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-03-10 21:22:58,640 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:58,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:58,640 INFO L82 PathProgramCache]: Analyzing trace with hash 579579668, now seen corresponding path program 1 times [2021-03-10 21:22:58,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:58,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720277290] [2021-03-10 21:22:58,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:58,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:58,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:58,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720277290] [2021-03-10 21:22:58,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:22:58,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:22:58,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615408176] [2021-03-10 21:22:58,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:22:58,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:58,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:22:58,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:22:58,682 INFO L87 Difference]: Start difference. First operand 93 states and 191 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:58,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:58,742 INFO L93 Difference]: Finished difference Result 129 states and 259 transitions. [2021-03-10 21:22:58,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:22:58,742 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:22:58,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:58,743 INFO L225 Difference]: With dead ends: 129 [2021-03-10 21:22:58,743 INFO L226 Difference]: Without dead ends: 119 [2021-03-10 21:22:58,743 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 68.0ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:22:58,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-03-10 21:22:58,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 93. [2021-03-10 21:22:58,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.0760869565217392) internal successors, (191), 92 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:58,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 191 transitions. [2021-03-10 21:22:58,745 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 191 transitions. Word has length 18 [2021-03-10 21:22:58,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:58,745 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 191 transitions. [2021-03-10 21:22:58,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:58,745 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 191 transitions. [2021-03-10 21:22:58,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:22:58,745 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:58,745 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:58,746 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-03-10 21:22:58,746 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:58,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:58,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1056444461, now seen corresponding path program 1 times [2021-03-10 21:22:58,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:58,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029206206] [2021-03-10 21:22:58,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:58,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:58,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:58,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029206206] [2021-03-10 21:22:58,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:22:58,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 21:22:58,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552516680] [2021-03-10 21:22:58,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:22:58,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:58,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:22:58,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:22:58,798 INFO L87 Difference]: Start difference. First operand 93 states and 191 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:58,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:58,902 INFO L93 Difference]: Finished difference Result 147 states and 289 transitions. [2021-03-10 21:22:58,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:22:58,902 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:22:58,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:58,902 INFO L225 Difference]: With dead ends: 147 [2021-03-10 21:22:58,902 INFO L226 Difference]: Without dead ends: 114 [2021-03-10 21:22:58,903 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 114.9ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:22:58,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-03-10 21:22:58,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 88. [2021-03-10 21:22:58,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.0804597701149423) internal successors, (181), 87 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:58,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 181 transitions. [2021-03-10 21:22:58,904 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 181 transitions. Word has length 18 [2021-03-10 21:22:58,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:58,904 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 181 transitions. [2021-03-10 21:22:58,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:58,905 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 181 transitions. [2021-03-10 21:22:58,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:22:58,905 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:58,905 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:58,905 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-03-10 21:22:58,905 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:58,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:58,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1727789867, now seen corresponding path program 2 times [2021-03-10 21:22:58,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:58,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335990108] [2021-03-10 21:22:58,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:58,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:58,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:58,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335990108] [2021-03-10 21:22:58,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:22:58,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 21:22:58,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745478810] [2021-03-10 21:22:58,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:22:58,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:58,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:22:58,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:22:58,954 INFO L87 Difference]: Start difference. First operand 88 states and 181 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:59,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:59,059 INFO L93 Difference]: Finished difference Result 175 states and 343 transitions. [2021-03-10 21:22:59,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:22:59,059 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:22:59,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:59,060 INFO L225 Difference]: With dead ends: 175 [2021-03-10 21:22:59,060 INFO L226 Difference]: Without dead ends: 147 [2021-03-10 21:22:59,060 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 102.8ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:22:59,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-03-10 21:22:59,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 110. [2021-03-10 21:22:59,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.073394495412844) internal successors, (226), 109 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:59,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 226 transitions. [2021-03-10 21:22:59,062 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 226 transitions. Word has length 18 [2021-03-10 21:22:59,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:59,062 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 226 transitions. [2021-03-10 21:22:59,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:59,062 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 226 transitions. [2021-03-10 21:22:59,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:22:59,062 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:59,063 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:59,063 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-03-10 21:22:59,063 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:59,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:59,063 INFO L82 PathProgramCache]: Analyzing trace with hash 563474972, now seen corresponding path program 2 times [2021-03-10 21:22:59,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:59,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856129840] [2021-03-10 21:22:59,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:59,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:59,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:59,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856129840] [2021-03-10 21:22:59,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:22:59,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:22:59,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646739050] [2021-03-10 21:22:59,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:22:59,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:59,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:22:59,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:22:59,095 INFO L87 Difference]: Start difference. First operand 110 states and 226 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:59,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:59,156 INFO L93 Difference]: Finished difference Result 172 states and 336 transitions. [2021-03-10 21:22:59,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:22:59,157 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:22:59,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:59,157 INFO L225 Difference]: With dead ends: 172 [2021-03-10 21:22:59,157 INFO L226 Difference]: Without dead ends: 159 [2021-03-10 21:22:59,158 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:22:59,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-03-10 21:22:59,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 120. [2021-03-10 21:22:59,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.0840336134453783) internal successors, (248), 119 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:59,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 248 transitions. [2021-03-10 21:22:59,160 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 248 transitions. Word has length 18 [2021-03-10 21:22:59,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:59,160 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 248 transitions. [2021-03-10 21:22:59,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:59,160 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 248 transitions. [2021-03-10 21:22:59,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:22:59,160 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:59,160 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:59,160 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-03-10 21:22:59,161 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:59,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:59,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1456838970, now seen corresponding path program 3 times [2021-03-10 21:22:59,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:59,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429332452] [2021-03-10 21:22:59,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:59,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:59,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:59,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429332452] [2021-03-10 21:22:59,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:22:59,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:22:59,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632527139] [2021-03-10 21:22:59,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:22:59,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:59,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:22:59,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:22:59,192 INFO L87 Difference]: Start difference. First operand 120 states and 248 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:59,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:59,251 INFO L93 Difference]: Finished difference Result 160 states and 319 transitions. [2021-03-10 21:22:59,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:22:59,252 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:22:59,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:59,252 INFO L225 Difference]: With dead ends: 160 [2021-03-10 21:22:59,252 INFO L226 Difference]: Without dead ends: 144 [2021-03-10 21:22:59,252 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.8ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:22:59,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-03-10 21:22:59,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 108. [2021-03-10 21:22:59,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.074766355140187) internal successors, (222), 107 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:59,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 222 transitions. [2021-03-10 21:22:59,254 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 222 transitions. Word has length 18 [2021-03-10 21:22:59,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:59,254 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 222 transitions. [2021-03-10 21:22:59,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:59,255 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 222 transitions. [2021-03-10 21:22:59,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:22:59,255 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:59,255 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:59,255 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-03-10 21:22:59,255 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:59,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:59,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1057522941, now seen corresponding path program 3 times [2021-03-10 21:22:59,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:59,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505780565] [2021-03-10 21:22:59,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:59,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:59,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:59,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505780565] [2021-03-10 21:22:59,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:22:59,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 21:22:59,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256397547] [2021-03-10 21:22:59,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:22:59,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:59,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:22:59,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:22:59,298 INFO L87 Difference]: Start difference. First operand 108 states and 222 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:59,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:59,425 INFO L93 Difference]: Finished difference Result 166 states and 316 transitions. [2021-03-10 21:22:59,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:22:59,425 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:22:59,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:59,426 INFO L225 Difference]: With dead ends: 166 [2021-03-10 21:22:59,426 INFO L226 Difference]: Without dead ends: 153 [2021-03-10 21:22:59,426 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 116.1ms TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:22:59,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-03-10 21:22:59,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 111. [2021-03-10 21:22:59,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 110 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:59,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 225 transitions. [2021-03-10 21:22:59,428 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 225 transitions. Word has length 18 [2021-03-10 21:22:59,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:59,428 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 225 transitions. [2021-03-10 21:22:59,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:59,428 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 225 transitions. [2021-03-10 21:22:59,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:22:59,428 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:59,428 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:59,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-03-10 21:22:59,428 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:59,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:59,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1950886939, now seen corresponding path program 4 times [2021-03-10 21:22:59,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:59,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184605553] [2021-03-10 21:22:59,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:59,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:59,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:59,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184605553] [2021-03-10 21:22:59,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:22:59,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 21:22:59,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980531966] [2021-03-10 21:22:59,467 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:22:59,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:59,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:22:59,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:22:59,468 INFO L87 Difference]: Start difference. First operand 111 states and 225 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:59,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:59,578 INFO L93 Difference]: Finished difference Result 157 states and 304 transitions. [2021-03-10 21:22:59,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:22:59,579 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:22:59,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:59,579 INFO L225 Difference]: With dead ends: 157 [2021-03-10 21:22:59,579 INFO L226 Difference]: Without dead ends: 120 [2021-03-10 21:22:59,579 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 104.0ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:22:59,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-03-10 21:22:59,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 90. [2021-03-10 21:22:59,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.0786516853932584) internal successors, (185), 89 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:59,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 185 transitions. [2021-03-10 21:22:59,581 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 185 transitions. Word has length 18 [2021-03-10 21:22:59,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:59,581 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 185 transitions. [2021-03-10 21:22:59,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:59,581 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 185 transitions. [2021-03-10 21:22:59,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:22:59,581 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:59,581 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:59,582 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-03-10 21:22:59,582 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:59,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:59,582 INFO L82 PathProgramCache]: Analyzing trace with hash 460332689, now seen corresponding path program 5 times [2021-03-10 21:22:59,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:59,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325875344] [2021-03-10 21:22:59,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:59,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:59,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:59,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325875344] [2021-03-10 21:22:59,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:22:59,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 21:22:59,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772634681] [2021-03-10 21:22:59,621 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:22:59,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:59,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:22:59,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:22:59,622 INFO L87 Difference]: Start difference. First operand 90 states and 185 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:59,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:59,713 INFO L93 Difference]: Finished difference Result 189 states and 381 transitions. [2021-03-10 21:22:59,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:22:59,713 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:22:59,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:59,714 INFO L225 Difference]: With dead ends: 189 [2021-03-10 21:22:59,714 INFO L226 Difference]: Without dead ends: 161 [2021-03-10 21:22:59,714 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 88.1ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:22:59,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-03-10 21:22:59,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 122. [2021-03-10 21:22:59,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.15702479338843) internal successors, (261), 121 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:59,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 261 transitions. [2021-03-10 21:22:59,716 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 261 transitions. Word has length 18 [2021-03-10 21:22:59,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:59,716 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 261 transitions. [2021-03-10 21:22:59,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:59,716 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 261 transitions. [2021-03-10 21:22:59,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:22:59,717 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:59,717 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:59,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-03-10 21:22:59,717 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:59,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:59,717 INFO L82 PathProgramCache]: Analyzing trace with hash -209934237, now seen corresponding path program 6 times [2021-03-10 21:22:59,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:59,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386428806] [2021-03-10 21:22:59,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:59,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:59,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:59,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386428806] [2021-03-10 21:22:59,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:22:59,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 21:22:59,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525726378] [2021-03-10 21:22:59,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:22:59,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:59,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:22:59,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:22:59,762 INFO L87 Difference]: Start difference. First operand 122 states and 261 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:59,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:59,855 INFO L93 Difference]: Finished difference Result 195 states and 376 transitions. [2021-03-10 21:22:59,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:22:59,855 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:22:59,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:59,856 INFO L225 Difference]: With dead ends: 195 [2021-03-10 21:22:59,856 INFO L226 Difference]: Without dead ends: 182 [2021-03-10 21:22:59,856 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 87.3ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:22:59,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-03-10 21:22:59,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 131. [2021-03-10 21:22:59,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.1384615384615384) internal successors, (278), 130 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:59,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 278 transitions. [2021-03-10 21:22:59,858 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 278 transitions. Word has length 18 [2021-03-10 21:22:59,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:59,858 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 278 transitions. [2021-03-10 21:22:59,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:59,858 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 278 transitions. [2021-03-10 21:22:59,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:22:59,859 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:59,859 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:59,859 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-03-10 21:22:59,859 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:59,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:59,859 INFO L82 PathProgramCache]: Analyzing trace with hash 683429761, now seen corresponding path program 7 times [2021-03-10 21:22:59,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:59,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317073629] [2021-03-10 21:22:59,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:59,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:59,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:59,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317073629] [2021-03-10 21:22:59,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:22:59,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 21:22:59,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510159488] [2021-03-10 21:22:59,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:22:59,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:59,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:22:59,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:22:59,905 INFO L87 Difference]: Start difference. First operand 131 states and 278 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:59,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:59,993 INFO L93 Difference]: Finished difference Result 180 states and 354 transitions. [2021-03-10 21:22:59,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:22:59,993 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:22:59,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:59,993 INFO L225 Difference]: With dead ends: 180 [2021-03-10 21:22:59,993 INFO L226 Difference]: Without dead ends: 149 [2021-03-10 21:22:59,994 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 90.5ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:22:59,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-03-10 21:22:59,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 116. [2021-03-10 21:22:59,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.0956521739130434) internal successors, (241), 115 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:59,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 241 transitions. [2021-03-10 21:22:59,996 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 241 transitions. Word has length 18 [2021-03-10 21:22:59,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:59,996 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 241 transitions. [2021-03-10 21:22:59,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:59,996 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 241 transitions. [2021-03-10 21:22:59,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:22:59,996 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:59,996 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:59,996 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-03-10 21:22:59,996 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:59,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:59,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1370649044, now seen corresponding path program 4 times [2021-03-10 21:22:59,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:59,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424045849] [2021-03-10 21:22:59,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:59,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:00,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:00,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424045849] [2021-03-10 21:23:00,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:23:00,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:23:00,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12278649] [2021-03-10 21:23:00,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:23:00,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:00,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:23:00,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:23:00,035 INFO L87 Difference]: Start difference. First operand 116 states and 241 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:00,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:00,100 INFO L93 Difference]: Finished difference Result 182 states and 359 transitions. [2021-03-10 21:23:00,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:23:00,100 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:23:00,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:00,100 INFO L225 Difference]: With dead ends: 182 [2021-03-10 21:23:00,101 INFO L226 Difference]: Without dead ends: 161 [2021-03-10 21:23:00,101 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 69.5ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:23:00,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-03-10 21:23:00,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 124. [2021-03-10 21:23:00,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.105691056910569) internal successors, (259), 123 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:00,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 259 transitions. [2021-03-10 21:23:00,103 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 259 transitions. Word has length 18 [2021-03-10 21:23:00,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:00,103 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 259 transitions. [2021-03-10 21:23:00,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:00,103 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 259 transitions. [2021-03-10 21:23:00,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:00,103 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:00,103 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:00,103 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-03-10 21:23:00,104 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:00,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:00,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1695120054, now seen corresponding path program 5 times [2021-03-10 21:23:00,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:00,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916101367] [2021-03-10 21:23:00,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:00,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:00,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:00,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916101367] [2021-03-10 21:23:00,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:23:00,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:23:00,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075631665] [2021-03-10 21:23:00,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:23:00,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:00,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:23:00,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:23:00,136 INFO L87 Difference]: Start difference. First operand 124 states and 259 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:00,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:00,198 INFO L93 Difference]: Finished difference Result 182 states and 358 transitions. [2021-03-10 21:23:00,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:23:00,198 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:23:00,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:00,199 INFO L225 Difference]: With dead ends: 182 [2021-03-10 21:23:00,199 INFO L226 Difference]: Without dead ends: 173 [2021-03-10 21:23:00,199 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 60.1ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:23:00,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-03-10 21:23:00,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 126. [2021-03-10 21:23:00,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.104) internal successors, (263), 125 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:00,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 263 transitions. [2021-03-10 21:23:00,201 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 263 transitions. Word has length 18 [2021-03-10 21:23:00,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:00,201 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 263 transitions. [2021-03-10 21:23:00,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:00,201 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 263 transitions. [2021-03-10 21:23:00,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:00,202 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:00,202 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:00,202 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-03-10 21:23:00,202 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:00,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:00,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1706483244, now seen corresponding path program 6 times [2021-03-10 21:23:00,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:00,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041294483] [2021-03-10 21:23:00,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:00,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:00,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:00,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041294483] [2021-03-10 21:23:00,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:23:00,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:23:00,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920921451] [2021-03-10 21:23:00,234 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:23:00,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:00,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:23:00,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:23:00,234 INFO L87 Difference]: Start difference. First operand 126 states and 263 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:00,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:00,301 INFO L93 Difference]: Finished difference Result 171 states and 344 transitions. [2021-03-10 21:23:00,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:23:00,301 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:23:00,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:00,302 INFO L225 Difference]: With dead ends: 171 [2021-03-10 21:23:00,302 INFO L226 Difference]: Without dead ends: 148 [2021-03-10 21:23:00,302 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 60.3ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:23:00,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-03-10 21:23:00,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 102. [2021-03-10 21:23:00,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.0495049504950495) internal successors, (207), 101 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:00,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 207 transitions. [2021-03-10 21:23:00,304 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 207 transitions. Word has length 18 [2021-03-10 21:23:00,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:00,304 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 207 transitions. [2021-03-10 21:23:00,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:00,304 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 207 transitions. [2021-03-10 21:23:00,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:00,304 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:00,305 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:00,305 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-03-10 21:23:00,305 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:00,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:00,305 INFO L82 PathProgramCache]: Analyzing trace with hash -493733101, now seen corresponding path program 8 times [2021-03-10 21:23:00,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:00,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384479207] [2021-03-10 21:23:00,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:00,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:00,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:00,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384479207] [2021-03-10 21:23:00,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:23:00,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 21:23:00,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782691176] [2021-03-10 21:23:00,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:23:00,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:00,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:23:00,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:23:00,344 INFO L87 Difference]: Start difference. First operand 102 states and 207 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:00,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:00,444 INFO L93 Difference]: Finished difference Result 166 states and 313 transitions. [2021-03-10 21:23:00,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:23:00,444 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:23:00,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:00,444 INFO L225 Difference]: With dead ends: 166 [2021-03-10 21:23:00,444 INFO L226 Difference]: Without dead ends: 145 [2021-03-10 21:23:00,445 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 93.6ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:23:00,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-03-10 21:23:00,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 106. [2021-03-10 21:23:00,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.019047619047619) internal successors, (212), 105 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:00,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 212 transitions. [2021-03-10 21:23:00,448 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 212 transitions. Word has length 18 [2021-03-10 21:23:00,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:00,448 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 212 transitions. [2021-03-10 21:23:00,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:00,448 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 212 transitions. [2021-03-10 21:23:00,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:00,448 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:00,449 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:00,449 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-03-10 21:23:00,449 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:00,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:00,449 INFO L82 PathProgramCache]: Analyzing trace with hash -169262091, now seen corresponding path program 9 times [2021-03-10 21:23:00,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:00,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104841824] [2021-03-10 21:23:00,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:00,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:00,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:00,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104841824] [2021-03-10 21:23:00,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:23:00,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 21:23:00,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708027959] [2021-03-10 21:23:00,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:23:00,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:00,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:23:00,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:23:00,491 INFO L87 Difference]: Start difference. First operand 106 states and 212 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:00,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:00,614 INFO L93 Difference]: Finished difference Result 166 states and 310 transitions. [2021-03-10 21:23:00,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:23:00,615 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:23:00,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:00,615 INFO L225 Difference]: With dead ends: 166 [2021-03-10 21:23:00,615 INFO L226 Difference]: Without dead ends: 157 [2021-03-10 21:23:00,616 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 101.0ms TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:23:00,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-03-10 21:23:00,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 107. [2021-03-10 21:23:00,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.009433962264151) internal successors, (213), 106 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:00,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 213 transitions. [2021-03-10 21:23:00,617 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 213 transitions. Word has length 18 [2021-03-10 21:23:00,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:00,618 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 213 transitions. [2021-03-10 21:23:00,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:00,618 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 213 transitions. [2021-03-10 21:23:00,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:00,618 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:00,618 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:00,618 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-03-10 21:23:00,618 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:00,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:00,618 INFO L82 PathProgramCache]: Analyzing trace with hash 724101907, now seen corresponding path program 10 times [2021-03-10 21:23:00,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:00,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095967622] [2021-03-10 21:23:00,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:00,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:00,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:00,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095967622] [2021-03-10 21:23:00,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:23:00,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 21:23:00,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783552166] [2021-03-10 21:23:00,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:23:00,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:00,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:23:00,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:23:00,677 INFO L87 Difference]: Start difference. First operand 107 states and 213 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:00,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:00,830 INFO L93 Difference]: Finished difference Result 155 states and 296 transitions. [2021-03-10 21:23:00,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:23:00,831 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:23:00,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:00,831 INFO L225 Difference]: With dead ends: 155 [2021-03-10 21:23:00,831 INFO L226 Difference]: Without dead ends: 106 [2021-03-10 21:23:00,832 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 128.5ms TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:23:00,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-03-10 21:23:00,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 78. [2021-03-10 21:23:00,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.064935064935065) internal successors, (159), 77 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:00,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 159 transitions. [2021-03-10 21:23:00,833 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 159 transitions. Word has length 18 [2021-03-10 21:23:00,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:00,833 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 159 transitions. [2021-03-10 21:23:00,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:00,834 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 159 transitions. [2021-03-10 21:23:00,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:00,834 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:00,834 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:00,834 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-03-10 21:23:00,834 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:00,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:00,834 INFO L82 PathProgramCache]: Analyzing trace with hash 283747689, now seen corresponding path program 11 times [2021-03-10 21:23:00,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:00,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186386510] [2021-03-10 21:23:00,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:00,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:00,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:00,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186386510] [2021-03-10 21:23:00,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:23:00,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 21:23:00,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968823406] [2021-03-10 21:23:00,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:23:00,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:00,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:23:00,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:23:00,884 INFO L87 Difference]: Start difference. First operand 78 states and 159 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:00,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:00,986 INFO L93 Difference]: Finished difference Result 110 states and 216 transitions. [2021-03-10 21:23:00,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:23:00,986 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:23:00,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:00,987 INFO L225 Difference]: With dead ends: 110 [2021-03-10 21:23:00,987 INFO L226 Difference]: Without dead ends: 82 [2021-03-10 21:23:00,987 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 92.0ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:00,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-03-10 21:23:00,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 66. [2021-03-10 21:23:00,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 65 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:00,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 129 transitions. [2021-03-10 21:23:00,988 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 129 transitions. Word has length 18 [2021-03-10 21:23:00,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:00,988 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 129 transitions. [2021-03-10 21:23:00,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:00,989 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 129 transitions. [2021-03-10 21:23:00,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:00,989 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:00,989 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:00,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-03-10 21:23:00,989 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:00,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:00,989 INFO L82 PathProgramCache]: Analyzing trace with hash -386519237, now seen corresponding path program 12 times [2021-03-10 21:23:00,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:00,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346077980] [2021-03-10 21:23:00,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:00,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:01,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:01,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346077980] [2021-03-10 21:23:01,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:23:01,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 21:23:01,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744243014] [2021-03-10 21:23:01,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:23:01,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:01,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:23:01,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:23:01,031 INFO L87 Difference]: Start difference. First operand 66 states and 129 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:01,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:01,126 INFO L93 Difference]: Finished difference Result 116 states and 211 transitions. [2021-03-10 21:23:01,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:23:01,126 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:23:01,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:01,127 INFO L225 Difference]: With dead ends: 116 [2021-03-10 21:23:01,127 INFO L226 Difference]: Without dead ends: 103 [2021-03-10 21:23:01,127 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 95.5ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:01,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-03-10 21:23:01,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 79. [2021-03-10 21:23:01,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0) internal successors, (156), 78 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:01,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 156 transitions. [2021-03-10 21:23:01,128 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 156 transitions. Word has length 18 [2021-03-10 21:23:01,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:01,129 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 156 transitions. [2021-03-10 21:23:01,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:01,129 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 156 transitions. [2021-03-10 21:23:01,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:01,129 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:01,129 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:01,129 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-03-10 21:23:01,129 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:01,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:01,129 INFO L82 PathProgramCache]: Analyzing trace with hash 506844761, now seen corresponding path program 13 times [2021-03-10 21:23:01,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:01,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887198679] [2021-03-10 21:23:01,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:01,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:01,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:01,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887198679] [2021-03-10 21:23:01,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:23:01,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 21:23:01,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752351297] [2021-03-10 21:23:01,186 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:23:01,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:01,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:23:01,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:23:01,187 INFO L87 Difference]: Start difference. First operand 79 states and 156 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:01,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:01,279 INFO L93 Difference]: Finished difference Result 101 states and 189 transitions. [2021-03-10 21:23:01,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:23:01,280 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:23:01,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:01,280 INFO L225 Difference]: With dead ends: 101 [2021-03-10 21:23:01,280 INFO L226 Difference]: Without dead ends: 70 [2021-03-10 21:23:01,280 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 94.7ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:01,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-03-10 21:23:01,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2021-03-10 21:23:01,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.8888888888888888) internal successors, (119), 63 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:01,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 119 transitions. [2021-03-10 21:23:01,281 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 119 transitions. Word has length 18 [2021-03-10 21:23:01,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:01,282 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 119 transitions. [2021-03-10 21:23:01,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:01,282 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 119 transitions. [2021-03-10 21:23:01,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:01,282 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:01,282 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:01,282 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-03-10 21:23:01,282 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:01,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:01,282 INFO L82 PathProgramCache]: Analyzing trace with hash -670318101, now seen corresponding path program 14 times [2021-03-10 21:23:01,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:01,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9281930] [2021-03-10 21:23:01,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:01,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:01,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:01,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9281930] [2021-03-10 21:23:01,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:23:01,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 21:23:01,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957073852] [2021-03-10 21:23:01,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:23:01,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:01,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:23:01,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:23:01,327 INFO L87 Difference]: Start difference. First operand 64 states and 119 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:01,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:01,447 INFO L93 Difference]: Finished difference Result 112 states and 193 transitions. [2021-03-10 21:23:01,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:23:01,447 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:23:01,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:01,448 INFO L225 Difference]: With dead ends: 112 [2021-03-10 21:23:01,448 INFO L226 Difference]: Without dead ends: 91 [2021-03-10 21:23:01,448 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 91.4ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:01,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-03-10 21:23:01,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2021-03-10 21:23:01,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.8507462686567164) internal successors, (124), 67 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:01,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 124 transitions. [2021-03-10 21:23:01,450 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 124 transitions. Word has length 18 [2021-03-10 21:23:01,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:01,450 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 124 transitions. [2021-03-10 21:23:01,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:01,451 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 124 transitions. [2021-03-10 21:23:01,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:01,451 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:01,451 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:01,451 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-03-10 21:23:01,451 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:01,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:01,451 INFO L82 PathProgramCache]: Analyzing trace with hash -345847091, now seen corresponding path program 15 times [2021-03-10 21:23:01,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:01,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563474699] [2021-03-10 21:23:01,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:01,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:01,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:01,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563474699] [2021-03-10 21:23:01,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:23:01,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 21:23:01,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798856006] [2021-03-10 21:23:01,500 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:23:01,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:01,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:23:01,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:23:01,501 INFO L87 Difference]: Start difference. First operand 68 states and 124 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:01,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:01,589 INFO L93 Difference]: Finished difference Result 100 states and 168 transitions. [2021-03-10 21:23:01,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:23:01,589 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:23:01,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:01,589 INFO L225 Difference]: With dead ends: 100 [2021-03-10 21:23:01,589 INFO L226 Difference]: Without dead ends: 91 [2021-03-10 21:23:01,589 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 90.0ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:01,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-03-10 21:23:01,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 69. [2021-03-10 21:23:01,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.838235294117647) internal successors, (125), 68 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:01,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 125 transitions. [2021-03-10 21:23:01,591 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 125 transitions. Word has length 18 [2021-03-10 21:23:01,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:01,591 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 125 transitions. [2021-03-10 21:23:01,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:01,591 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 125 transitions. [2021-03-10 21:23:01,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:01,591 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:01,591 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:01,591 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-03-10 21:23:01,591 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:01,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:01,591 INFO L82 PathProgramCache]: Analyzing trace with hash 547516907, now seen corresponding path program 16 times [2021-03-10 21:23:01,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:01,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832257622] [2021-03-10 21:23:01,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:01,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:01,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:01,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832257622] [2021-03-10 21:23:01,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:23:01,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 21:23:01,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575788214] [2021-03-10 21:23:01,643 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:23:01,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:01,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:23:01,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:23:01,643 INFO L87 Difference]: Start difference. First operand 69 states and 125 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:01,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:01,734 INFO L93 Difference]: Finished difference Result 89 states and 154 transitions. [2021-03-10 21:23:01,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:23:01,734 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:23:01,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:01,734 INFO L225 Difference]: With dead ends: 89 [2021-03-10 21:23:01,734 INFO L226 Difference]: Without dead ends: 48 [2021-03-10 21:23:01,735 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 92.2ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:01,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-03-10 21:23:01,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-03-10 21:23:01,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.6666666666666667) internal successors, (75), 45 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) [2021-03-10 21:23:01,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 75 transitions. [2021-03-10 21:23:01,736 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 75 transitions. Word has length 18 [2021-03-10 21:23:01,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:01,736 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 75 transitions. [2021-03-10 21:23:01,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:01,736 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 75 transitions. [2021-03-10 21:23:01,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:01,736 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:01,736 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:01,736 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-03-10 21:23:01,736 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:01,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:01,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1859620800, now seen corresponding path program 7 times [2021-03-10 21:23:01,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:01,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576348321] [2021-03-10 21:23:01,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:01,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:01,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:01,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576348321] [2021-03-10 21:23:01,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:23:01,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:23:01,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396368970] [2021-03-10 21:23:01,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:23:01,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:01,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:23:01,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:23:01,784 INFO L87 Difference]: Start difference. First operand 46 states and 75 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:01,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:01,849 INFO L93 Difference]: Finished difference Result 109 states and 168 transitions. [2021-03-10 21:23:01,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:23:01,849 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:23:01,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:01,849 INFO L225 Difference]: With dead ends: 109 [2021-03-10 21:23:01,849 INFO L226 Difference]: Without dead ends: 88 [2021-03-10 21:23:01,850 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 64.2ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:23:01,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-03-10 21:23:01,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 51. [2021-03-10 21:23:01,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.64) internal successors, (82), 50 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:01,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 82 transitions. [2021-03-10 21:23:01,851 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 82 transitions. Word has length 18 [2021-03-10 21:23:01,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:01,851 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 82 transitions. [2021-03-10 21:23:01,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:01,852 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 82 transitions. [2021-03-10 21:23:01,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:01,852 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:01,852 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:01,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-03-10 21:23:01,852 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:01,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:01,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1478454498, now seen corresponding path program 8 times [2021-03-10 21:23:01,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:01,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583373863] [2021-03-10 21:23:01,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:01,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:01,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:01,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583373863] [2021-03-10 21:23:01,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:23:01,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:23:01,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94537181] [2021-03-10 21:23:01,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:23:01,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:01,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:23:01,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:23:01,890 INFO L87 Difference]: Start difference. First operand 51 states and 82 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:01,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:01,960 INFO L93 Difference]: Finished difference Result 103 states and 153 transitions. [2021-03-10 21:23:01,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:23:01,960 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:23:01,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:01,960 INFO L225 Difference]: With dead ends: 103 [2021-03-10 21:23:01,960 INFO L226 Difference]: Without dead ends: 94 [2021-03-10 21:23:01,960 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 73.8ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:23:01,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-03-10 21:23:01,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 52. [2021-03-10 21:23:01,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.6274509803921569) internal successors, (83), 51 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:01,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 83 transitions. [2021-03-10 21:23:01,965 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 83 transitions. Word has length 18 [2021-03-10 21:23:01,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:01,965 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 83 transitions. [2021-03-10 21:23:01,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:01,965 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 83 transitions. [2021-03-10 21:23:01,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:01,965 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:01,965 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:01,965 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-03-10 21:23:01,965 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:01,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:01,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1923148800, now seen corresponding path program 9 times [2021-03-10 21:23:01,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:01,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098452012] [2021-03-10 21:23:01,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:01,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:02,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:02,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098452012] [2021-03-10 21:23:02,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:23:02,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:23:02,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491020964] [2021-03-10 21:23:02,004 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:23:02,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:02,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:23:02,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:23:02,004 INFO L87 Difference]: Start difference. First operand 52 states and 83 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:02,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:02,068 INFO L93 Difference]: Finished difference Result 92 states and 139 transitions. [2021-03-10 21:23:02,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:23:02,069 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:23:02,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:02,069 INFO L225 Difference]: With dead ends: 92 [2021-03-10 21:23:02,069 INFO L226 Difference]: Without dead ends: 65 [2021-03-10 21:23:02,070 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 66.4ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:23:02,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-03-10 21:23:02,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 39. [2021-03-10 21:23:02,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 38 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:02,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 59 transitions. [2021-03-10 21:23:02,071 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 59 transitions. Word has length 18 [2021-03-10 21:23:02,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:02,071 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 59 transitions. [2021-03-10 21:23:02,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:02,071 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 59 transitions. [2021-03-10 21:23:02,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:02,072 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:02,072 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:02,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-03-10 21:23:02,072 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:02,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:02,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1683572320, now seen corresponding path program 10 times [2021-03-10 21:23:02,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:02,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619810206] [2021-03-10 21:23:02,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:02,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:02,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:02,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619810206] [2021-03-10 21:23:02,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:23:02,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 21:23:02,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945847873] [2021-03-10 21:23:02,104 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:23:02,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:02,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:23:02,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:23:02,105 INFO L87 Difference]: Start difference. First operand 39 states and 59 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:02,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:02,160 INFO L93 Difference]: Finished difference Result 63 states and 94 transitions. [2021-03-10 21:23:02,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:23:02,160 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:23:02,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:02,160 INFO L225 Difference]: With dead ends: 63 [2021-03-10 21:23:02,160 INFO L226 Difference]: Without dead ends: 39 [2021-03-10 21:23:02,161 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 65.4ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:23:02,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-03-10 21:23:02,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2021-03-10 21:23:02,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 36 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:02,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 56 transitions. [2021-03-10 21:23:02,161 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 56 transitions. Word has length 18 [2021-03-10 21:23:02,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:02,161 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 56 transitions. [2021-03-10 21:23:02,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:02,162 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 56 transitions. [2021-03-10 21:23:02,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:02,162 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:02,162 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:02,162 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-03-10 21:23:02,162 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:02,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:02,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1726756319, now seen corresponding path program 17 times [2021-03-10 21:23:02,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:02,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024384463] [2021-03-10 21:23:02,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:02,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:02,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:02,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024384463] [2021-03-10 21:23:02,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:23:02,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 21:23:02,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613245230] [2021-03-10 21:23:02,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:23:02,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:02,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:23:02,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:23:02,202 INFO L87 Difference]: Start difference. First operand 37 states and 56 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:02,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:02,312 INFO L93 Difference]: Finished difference Result 71 states and 102 transitions. [2021-03-10 21:23:02,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:23:02,313 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:23:02,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:02,313 INFO L225 Difference]: With dead ends: 71 [2021-03-10 21:23:02,313 INFO L226 Difference]: Without dead ends: 50 [2021-03-10 21:23:02,313 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 95.1ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:02,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-03-10 21:23:02,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2021-03-10 21:23:02,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 36 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:02,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-03-10 21:23:02,314 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 18 [2021-03-10 21:23:02,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:02,314 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-03-10 21:23:02,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:02,314 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-03-10 21:23:02,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:02,315 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:02,315 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:02,315 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-03-10 21:23:02,315 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:02,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:02,315 INFO L82 PathProgramCache]: Analyzing trace with hash -2107922621, now seen corresponding path program 18 times [2021-03-10 21:23:02,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:02,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204108860] [2021-03-10 21:23:02,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:02,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:02,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:02,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204108860] [2021-03-10 21:23:02,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:23:02,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 21:23:02,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510824856] [2021-03-10 21:23:02,358 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:23:02,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:02,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:23:02,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:23:02,358 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:02,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:02,441 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2021-03-10 21:23:02,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:23:02,442 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:23:02,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:02,442 INFO L225 Difference]: With dead ends: 63 [2021-03-10 21:23:02,442 INFO L226 Difference]: Without dead ends: 54 [2021-03-10 21:23:02,442 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 100.0ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:02,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-03-10 21:23:02,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2021-03-10 21:23:02,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 36 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:02,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 51 transitions. [2021-03-10 21:23:02,443 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 51 transitions. Word has length 18 [2021-03-10 21:23:02,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:02,443 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 51 transitions. [2021-03-10 21:23:02,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:02,443 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 51 transitions. [2021-03-10 21:23:02,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:02,443 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:02,443 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:02,443 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-03-10 21:23:02,444 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:02,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:02,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1214558623, now seen corresponding path program 19 times [2021-03-10 21:23:02,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:02,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320710243] [2021-03-10 21:23:02,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:02,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:02,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:02,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320710243] [2021-03-10 21:23:02,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:23:02,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 21:23:02,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847120471] [2021-03-10 21:23:02,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:23:02,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:02,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:23:02,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:23:02,482 INFO L87 Difference]: Start difference. First operand 37 states and 51 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:02,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:02,561 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2021-03-10 21:23:02,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:23:02,561 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:23:02,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:02,561 INFO L225 Difference]: With dead ends: 52 [2021-03-10 21:23:02,561 INFO L226 Difference]: Without dead ends: 35 [2021-03-10 21:23:02,561 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 89.7ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:02,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-03-10 21:23:02,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2021-03-10 21:23:02,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:02,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2021-03-10 21:23:02,562 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 18 [2021-03-10 21:23:02,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:02,562 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2021-03-10 21:23:02,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:02,562 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2021-03-10 21:23:02,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:02,562 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:02,562 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:02,563 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-03-10 21:23:02,563 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:02,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:02,563 INFO L82 PathProgramCache]: Analyzing trace with hash -974982143, now seen corresponding path program 20 times [2021-03-10 21:23:02,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:02,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701050699] [2021-03-10 21:23:02,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:02,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:02,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:02,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701050699] [2021-03-10 21:23:02,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:23:02,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 21:23:02,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587752475] [2021-03-10 21:23:02,604 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:23:02,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:02,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:23:02,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:23:02,605 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:02,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:02,673 INFO L93 Difference]: Finished difference Result 33 states and 45 transitions. [2021-03-10 21:23:02,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:23:02,673 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:23:02,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:02,673 INFO L225 Difference]: With dead ends: 33 [2021-03-10 21:23:02,673 INFO L226 Difference]: Without dead ends: 0 [2021-03-10 21:23:02,674 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 90.3ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:02,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-03-10 21:23:02,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-03-10 21:23:02,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:02,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-03-10 21:23:02,674 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2021-03-10 21:23:02,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:02,674 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-03-10 21:23:02,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:02,674 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-03-10 21:23:02,674 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-03-10 21:23:02,674 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-03-10 21:23:02,677 INFO L202 PluginConnector]: Adding new model security.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.03 09:23:02 BasicIcfg [2021-03-10 21:23:02,677 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-10 21:23:02,678 INFO L168 Benchmark]: Toolchain (without parser) took 6621.96 ms. Allocated memory was 255.9 MB in the beginning and 419.4 MB in the end (delta: 163.6 MB). Free memory was 236.8 MB in the beginning and 215.1 MB in the end (delta: 21.7 MB). Peak memory consumption was 186.5 MB. Max. memory is 16.0 GB. [2021-03-10 21:23:02,678 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 255.9 MB. Free memory is still 237.8 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 21:23:02,678 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.44 ms. Allocated memory is still 255.9 MB. Free memory was 236.2 MB in the beginning and 234.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 21:23:02,678 INFO L168 Benchmark]: Boogie Preprocessor took 8.92 ms. Allocated memory is still 255.9 MB. Free memory was 234.8 MB in the beginning and 233.9 MB in the end (delta: 926.8 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. [2021-03-10 21:23:02,678 INFO L168 Benchmark]: RCFGBuilder took 156.41 ms. Allocated memory is still 255.9 MB. Free memory was 233.8 MB in the beginning and 240.5 MB in the end (delta: -6.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 16.0 GB. [2021-03-10 21:23:02,678 INFO L168 Benchmark]: TraceAbstraction took 6432.98 ms. Allocated memory was 255.9 MB in the beginning and 419.4 MB in the end (delta: 163.6 MB). Free memory was 240.0 MB in the beginning and 215.1 MB in the end (delta: 24.8 MB). Peak memory consumption was 187.9 MB. Max. memory is 16.0 GB. [2021-03-10 21:23:02,678 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 255.9 MB. Free memory is still 237.8 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 17.44 ms. Allocated memory is still 255.9 MB. Free memory was 236.2 MB in the beginning and 234.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 8.92 ms. Allocated memory is still 255.9 MB. Free memory was 234.8 MB in the beginning and 233.9 MB in the end (delta: 926.8 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. * RCFGBuilder took 156.41 ms. Allocated memory is still 255.9 MB. Free memory was 233.8 MB in the beginning and 240.5 MB in the end (delta: -6.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 6432.98 ms. Allocated memory was 255.9 MB in the beginning and 419.4 MB in the end (delta: 163.6 MB). Free memory was 240.0 MB in the beginning and 215.1 MB in the end (delta: 24.8 MB). Peak memory consumption was 187.9 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 69]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6383.4ms, OverallIterations: 48, TraceHistogramMax: 1, EmptinessCheckTime: 22.5ms, AutomataDifference: 3947.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 15.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2185 SDtfs, 3030 SDslu, 6767 SDs, 0 SdLazy, 2178 SolverSat, 90 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1007.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 560 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 459 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 3671.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=131occurred in iteration=27, InterpolantAutomatonStates: 357, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 153.2ms AutomataMinimizationTime, 48 MinimizatonAttempts, 1682 StatesRemovedByMinimization, 47 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 20.4ms SsaConstructionTime, 76.4ms SatisfiabilityAnalysisTime, 1903.9ms InterpolantComputationTime, 861 NumberOfCodeBlocks, 861 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 813 ConstructedInterpolants, 0 QuantifiedInterpolants, 5484 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 48 InterpolantComputations, 48 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...