/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/chl/word-subst.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d47b94137d5c7dd60722882962a90fb345e61909-d47b941 [2021-05-03 14:53:45,702 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 14:53:45,703 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 14:53:45,728 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 14:53:45,785 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 [2021-05-03 14:53:45,820 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 14:53:45,821 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 14:53:45,821 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-03 14:53:45,821 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-03 14:53:45,824 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-03 14:53:45,824 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-03 14:53:45,824 INFO L138 SettingsManager]: * Use SBE=true [2021-05-03 14:53:45,824 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 14:53:45,825 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 14:53:45,825 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 14:53:45,825 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 14:53:45,826 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 14:53:45,826 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 14:53:45,826 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 14:53:45,826 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 14:53:45,826 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 14:53:45,826 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 14:53:45,826 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 14:53:45,826 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 14:53:45,826 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 14:53:45,827 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 14:53:45,827 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 14:53:45,827 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 14:53:45,827 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 14:53:45,827 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 14:53:45,827 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-03 14:53:45,827 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-03 14:53:45,827 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-03 14:53:45,827 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-03 14:53:45,827 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-03 14:53:45,828 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 14:53:45,828 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-03 14:53:46,103 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 14:53:46,119 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 14:53:46,121 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 14:53:46,122 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-03 14:53:46,123 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-03 14:53:46,124 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/word-subst.wvr.bpl [2021-05-03 14:53:46,124 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/word-subst.wvr.bpl' [2021-05-03 14:53:46,171 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 14:53:46,172 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 14:53:46,173 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-03 14:53:46,173 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-03 14:53:46,173 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-03 14:53:46,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:53:46" (1/1) ... [2021-05-03 14:53:46,197 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:53:46" (1/1) ... [2021-05-03 14:53:46,203 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-03 14:53:46,204 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 14:53:46,204 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 14:53:46,204 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 14:53:46,210 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:53:46" (1/1) ... [2021-05-03 14:53:46,210 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:53:46" (1/1) ... [2021-05-03 14:53:46,211 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:53:46" (1/1) ... [2021-05-03 14:53:46,211 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:53:46" (1/1) ... [2021-05-03 14:53:46,217 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:53:46" (1/1) ... [2021-05-03 14:53:46,220 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:53:46" (1/1) ... [2021-05-03 14:53:46,221 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:53:46" (1/1) ... [2021-05-03 14:53:46,222 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 14:53:46,222 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 14:53:46,223 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 14:53:46,223 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 14:53:46,224 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:53:46" (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 [2021-05-03 14:53:46,278 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-03 14:53:46,278 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-03 14:53:46,278 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-03 14:53:46,278 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-03 14:53:46,278 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-03 14:53:46,278 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-03 14:53:46,278 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-03 14:53:46,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 14:53:46,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 14:53:46,279 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-03 14:53:46,279 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-03 14:53:46,279 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-03 14:53:46,280 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-03 14:53:46,613 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 14:53:46,613 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-03 14:53:46,615 INFO L202 PluginConnector]: Adding new model word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 02:53:46 BoogieIcfgContainer [2021-05-03 14:53:46,615 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 14:53:46,616 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 14:53:46,616 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 14:53:46,618 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 14:53:46,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:53:46" (1/2) ... [2021-05-03 14:53:46,619 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7842b789 and model type word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 02:53:46, skipping insertion in model container [2021-05-03 14:53:46,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 02:53:46" (2/2) ... [2021-05-03 14:53:46,620 INFO L111 eAbstractionObserver]: Analyzing ICFG word-subst.wvr.bpl [2021-05-03 14:53:46,629 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-03 14:53:46,630 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-03 14:53:46,635 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 14:53:46,636 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-03 14:53:46,685 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-05-03 14:53:46,698 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-05-03 14:53:46,726 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 14:53:46,726 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 14:53:46,726 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-03 14:53:46,727 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 14:53:46,727 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 14:53:46,727 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 14:53:46,727 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 14:53:46,727 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 14:53:46,736 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 80 flow [2021-05-03 14:53:46,757 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 110 states, 108 states have (on average 3.4814814814814814) internal successors, (376), 109 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:46,759 INFO L276 IsEmpty]: Start isEmpty. Operand has 110 states, 108 states have (on average 3.4814814814814814) internal successors, (376), 109 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:46,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:53:46,769 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:46,769 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:46,770 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:46,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:46,775 INFO L82 PathProgramCache]: Analyzing trace with hash -200100504, now seen corresponding path program 1 times [2021-05-03 14:53:46,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:46,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092050007] [2021-05-03 14:53:46,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:46,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:46,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:46,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092050007] [2021-05-03 14:53:46,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:46,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 14:53:46,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74797868] [2021-05-03 14:53:47,001 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 14:53:47,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:47,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 14:53:47,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-03 14:53:47,017 INFO L87 Difference]: Start difference. First operand has 110 states, 108 states have (on average 3.4814814814814814) internal successors, (376), 109 states have internal predecessors, (376), 0 states have call successors, (0), 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 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:47,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:47,074 INFO L93 Difference]: Finished difference Result 171 states and 561 transitions. [2021-05-03 14:53:47,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 14:53:47,075 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2021-05-03 14:53:47,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:47,086 INFO L225 Difference]: With dead ends: 171 [2021-05-03 14:53:47,086 INFO L226 Difference]: Without dead ends: 108 [2021-05-03 14:53:47,087 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-03 14:53:47,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-03 14:53:47,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-05-03 14:53:47,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 3.2990654205607477) internal successors, (353), 107 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:47,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 353 transitions. [2021-05-03 14:53:47,132 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 353 transitions. Word has length 14 [2021-05-03 14:53:47,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:47,133 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 353 transitions. [2021-05-03 14:53:47,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:47,133 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 353 transitions. [2021-05-03 14:53:47,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:53:47,136 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:47,136 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:47,136 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 14:53:47,136 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:47,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:47,140 INFO L82 PathProgramCache]: Analyzing trace with hash -294876135, now seen corresponding path program 1 times [2021-05-03 14:53:47,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:47,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326804225] [2021-05-03 14:53:47,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:47,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:47,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:47,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326804225] [2021-05-03 14:53:47,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:47,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 14:53:47,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010383187] [2021-05-03 14:53:47,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 14:53:47,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:47,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 14:53:47,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:53:47,231 INFO L87 Difference]: Start difference. First operand 108 states and 353 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:47,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:47,360 INFO L93 Difference]: Finished difference Result 172 states and 504 transitions. [2021-05-03 14:53:47,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 14:53:47,361 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-05-03 14:53:47,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:47,363 INFO L225 Difference]: With dead ends: 172 [2021-05-03 14:53:47,363 INFO L226 Difference]: Without dead ends: 153 [2021-05-03 14:53:47,363 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 64.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:53:47,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-05-03 14:53:47,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 123. [2021-05-03 14:53:47,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 3.19672131147541) internal successors, (390), 122 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:47,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 390 transitions. [2021-05-03 14:53:47,372 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 390 transitions. Word has length 15 [2021-05-03 14:53:47,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:47,375 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 390 transitions. [2021-05-03 14:53:47,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:47,375 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 390 transitions. [2021-05-03 14:53:47,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:53:47,380 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:47,380 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:47,381 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 14:53:47,381 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:47,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:47,382 INFO L82 PathProgramCache]: Analyzing trace with hash -487883073, now seen corresponding path program 2 times [2021-05-03 14:53:47,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:47,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093574456] [2021-05-03 14:53:47,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:47,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:47,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:47,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093574456] [2021-05-03 14:53:47,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:47,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 14:53:47,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921386001] [2021-05-03 14:53:47,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 14:53:47,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:47,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 14:53:47,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:53:47,469 INFO L87 Difference]: Start difference. First operand 123 states and 390 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:47,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:47,576 INFO L93 Difference]: Finished difference Result 179 states and 520 transitions. [2021-05-03 14:53:47,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 14:53:47,577 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-05-03 14:53:47,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:47,582 INFO L225 Difference]: With dead ends: 179 [2021-05-03 14:53:47,582 INFO L226 Difference]: Without dead ends: 160 [2021-05-03 14:53:47,582 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 56.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:53:47,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-05-03 14:53:47,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 131. [2021-05-03 14:53:47,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 3.1538461538461537) internal successors, (410), 130 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:47,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 410 transitions. [2021-05-03 14:53:47,596 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 410 transitions. Word has length 15 [2021-05-03 14:53:47,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:47,596 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 410 transitions. [2021-05-03 14:53:47,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:47,596 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 410 transitions. [2021-05-03 14:53:47,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:53:47,597 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:47,597 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:47,597 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-03 14:53:47,597 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:47,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:47,597 INFO L82 PathProgramCache]: Analyzing trace with hash 372369077, now seen corresponding path program 3 times [2021-05-03 14:53:47,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:47,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138486713] [2021-05-03 14:53:47,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:47,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:47,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:47,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138486713] [2021-05-03 14:53:47,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:47,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 14:53:47,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156212934] [2021-05-03 14:53:47,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 14:53:47,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:47,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 14:53:47,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:53:47,653 INFO L87 Difference]: Start difference. First operand 131 states and 410 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:47,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:47,740 INFO L93 Difference]: Finished difference Result 235 states and 657 transitions. [2021-05-03 14:53:47,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 14:53:47,740 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-05-03 14:53:47,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:47,743 INFO L225 Difference]: With dead ends: 235 [2021-05-03 14:53:47,743 INFO L226 Difference]: Without dead ends: 216 [2021-05-03 14:53:47,743 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 72.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:53:47,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-05-03 14:53:47,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 135. [2021-05-03 14:53:47,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 3.1492537313432836) internal successors, (422), 134 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:47,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 422 transitions. [2021-05-03 14:53:47,763 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 422 transitions. Word has length 15 [2021-05-03 14:53:47,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:47,763 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 422 transitions. [2021-05-03 14:53:47,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:47,763 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 422 transitions. [2021-05-03 14:53:47,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:53:47,765 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:47,765 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:47,765 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-03 14:53:47,765 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:47,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:47,766 INFO L82 PathProgramCache]: Analyzing trace with hash 384286855, now seen corresponding path program 4 times [2021-05-03 14:53:47,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:47,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31543598] [2021-05-03 14:53:47,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:47,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:47,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:47,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31543598] [2021-05-03 14:53:47,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:47,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 14:53:47,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744016387] [2021-05-03 14:53:47,845 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 14:53:47,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:47,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 14:53:47,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:53:47,846 INFO L87 Difference]: Start difference. First operand 135 states and 422 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:47,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:47,918 INFO L93 Difference]: Finished difference Result 194 states and 550 transitions. [2021-05-03 14:53:47,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 14:53:47,919 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-05-03 14:53:47,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:47,922 INFO L225 Difference]: With dead ends: 194 [2021-05-03 14:53:47,922 INFO L226 Difference]: Without dead ends: 171 [2021-05-03 14:53:47,922 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 83.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:53:47,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-05-03 14:53:47,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 135. [2021-05-03 14:53:47,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 3.1343283582089554) internal successors, (420), 134 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:47,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 420 transitions. [2021-05-03 14:53:47,929 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 420 transitions. Word has length 15 [2021-05-03 14:53:47,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:47,929 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 420 transitions. [2021-05-03 14:53:47,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:47,929 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 420 transitions. [2021-05-03 14:53:47,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:53:47,930 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:47,930 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:47,930 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-03 14:53:47,930 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:47,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:47,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1046340473, now seen corresponding path program 5 times [2021-05-03 14:53:47,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:47,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359982011] [2021-05-03 14:53:47,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:47,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:47,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:47,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359982011] [2021-05-03 14:53:47,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:47,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 14:53:47,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927658794] [2021-05-03 14:53:47,993 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 14:53:47,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:47,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 14:53:47,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:53:47,993 INFO L87 Difference]: Start difference. First operand 135 states and 420 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:48,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:48,064 INFO L93 Difference]: Finished difference Result 228 states and 638 transitions. [2021-05-03 14:53:48,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 14:53:48,064 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-05-03 14:53:48,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:48,065 INFO L225 Difference]: With dead ends: 228 [2021-05-03 14:53:48,065 INFO L226 Difference]: Without dead ends: 209 [2021-05-03 14:53:48,066 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 70.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:53:48,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-05-03 14:53:48,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 137. [2021-05-03 14:53:48,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 3.139705882352941) internal successors, (427), 136 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:48,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 427 transitions. [2021-05-03 14:53:48,070 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 427 transitions. Word has length 15 [2021-05-03 14:53:48,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:48,070 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 427 transitions. [2021-05-03 14:53:48,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:48,071 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 427 transitions. [2021-05-03 14:53:48,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:53:48,071 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:48,071 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:48,071 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-03 14:53:48,071 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:48,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:48,072 INFO L82 PathProgramCache]: Analyzing trace with hash -964122021, now seen corresponding path program 6 times [2021-05-03 14:53:48,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:48,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235068993] [2021-05-03 14:53:48,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:48,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:48,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:48,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235068993] [2021-05-03 14:53:48,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:48,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 14:53:48,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896555536] [2021-05-03 14:53:48,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 14:53:48,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:48,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 14:53:48,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:53:48,152 INFO L87 Difference]: Start difference. First operand 137 states and 427 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:48,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:48,215 INFO L93 Difference]: Finished difference Result 195 states and 552 transitions. [2021-05-03 14:53:48,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 14:53:48,215 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-05-03 14:53:48,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:48,217 INFO L225 Difference]: With dead ends: 195 [2021-05-03 14:53:48,217 INFO L226 Difference]: Without dead ends: 172 [2021-05-03 14:53:48,217 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 80.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:53:48,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-05-03 14:53:48,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 137. [2021-05-03 14:53:48,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 3.125) internal successors, (425), 136 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:48,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 425 transitions. [2021-05-03 14:53:48,222 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 425 transitions. Word has length 15 [2021-05-03 14:53:48,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:48,222 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 425 transitions. [2021-05-03 14:53:48,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:48,222 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 425 transitions. [2021-05-03 14:53:48,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:53:48,223 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:48,223 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:48,223 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-03 14:53:48,223 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:48,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:48,224 INFO L82 PathProgramCache]: Analyzing trace with hash -570116437, now seen corresponding path program 1 times [2021-05-03 14:53:48,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:48,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838488585] [2021-05-03 14:53:48,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:48,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:48,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:48,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838488585] [2021-05-03 14:53:48,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:48,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 14:53:48,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398316387] [2021-05-03 14:53:48,250 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 14:53:48,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:48,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 14:53:48,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 14:53:48,250 INFO L87 Difference]: Start difference. First operand 137 states and 425 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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) [2021-05-03 14:53:48,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:48,274 INFO L93 Difference]: Finished difference Result 203 states and 586 transitions. [2021-05-03 14:53:48,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 14:53:48,274 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 [2021-05-03 14:53:48,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:48,275 INFO L225 Difference]: With dead ends: 203 [2021-05-03 14:53:48,275 INFO L226 Difference]: Without dead ends: 203 [2021-05-03 14:53:48,276 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:53:48,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-05-03 14:53:48,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 136. [2021-05-03 14:53:48,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 3.1185185185185187) internal successors, (421), 135 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:48,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 421 transitions. [2021-05-03 14:53:48,280 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 421 transitions. Word has length 16 [2021-05-03 14:53:48,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:48,280 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 421 transitions. [2021-05-03 14:53:48,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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) [2021-05-03 14:53:48,281 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 421 transitions. [2021-05-03 14:53:48,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:53:48,281 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:48,281 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:48,281 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-03 14:53:48,282 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:48,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:48,282 INFO L82 PathProgramCache]: Analyzing trace with hash -581930556, now seen corresponding path program 1 times [2021-05-03 14:53:48,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:48,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143286191] [2021-05-03 14:53:48,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:48,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:48,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:48,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143286191] [2021-05-03 14:53:48,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:48,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 14:53:48,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3561739] [2021-05-03 14:53:48,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 14:53:48,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:48,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 14:53:48,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 14:53:48,298 INFO L87 Difference]: Start difference. First operand 136 states and 421 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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) [2021-05-03 14:53:48,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:48,323 INFO L93 Difference]: Finished difference Result 194 states and 542 transitions. [2021-05-03 14:53:48,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 14:53:48,324 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 [2021-05-03 14:53:48,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:48,325 INFO L225 Difference]: With dead ends: 194 [2021-05-03 14:53:48,325 INFO L226 Difference]: Without dead ends: 171 [2021-05-03 14:53:48,325 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:53:48,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-05-03 14:53:48,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 136. [2021-05-03 14:53:48,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 3.022222222222222) internal successors, (408), 135 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:48,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 408 transitions. [2021-05-03 14:53:48,329 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 408 transitions. Word has length 16 [2021-05-03 14:53:48,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:48,329 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 408 transitions. [2021-05-03 14:53:48,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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) [2021-05-03 14:53:48,330 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 408 transitions. [2021-05-03 14:53:48,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:53:48,330 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:48,330 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:48,330 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-03 14:53:48,331 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:48,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:48,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1420564495, now seen corresponding path program 2 times [2021-05-03 14:53:48,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:48,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355927545] [2021-05-03 14:53:48,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:48,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:48,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:48,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355927545] [2021-05-03 14:53:48,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:48,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 14:53:48,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564949055] [2021-05-03 14:53:48,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 14:53:48,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:48,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 14:53:48,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 14:53:48,347 INFO L87 Difference]: Start difference. First operand 136 states and 408 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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) [2021-05-03 14:53:48,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:48,375 INFO L93 Difference]: Finished difference Result 205 states and 567 transitions. [2021-05-03 14:53:48,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 14:53:48,377 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 [2021-05-03 14:53:48,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:48,379 INFO L225 Difference]: With dead ends: 205 [2021-05-03 14:53:48,379 INFO L226 Difference]: Without dead ends: 205 [2021-05-03 14:53:48,379 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:53:48,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-05-03 14:53:48,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 114. [2021-05-03 14:53:48,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.920353982300885) internal successors, (330), 113 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:48,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 330 transitions. [2021-05-03 14:53:48,384 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 330 transitions. Word has length 16 [2021-05-03 14:53:48,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:48,385 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 330 transitions. [2021-05-03 14:53:48,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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) [2021-05-03 14:53:48,385 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 330 transitions. [2021-05-03 14:53:48,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:53:48,386 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:48,386 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:48,386 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-03 14:53:48,386 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:48,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:48,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1521275701, now seen corresponding path program 3 times [2021-05-03 14:53:48,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:48,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124483778] [2021-05-03 14:53:48,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:48,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:48,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:48,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124483778] [2021-05-03 14:53:48,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:48,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 14:53:48,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993122979] [2021-05-03 14:53:48,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 14:53:48,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:48,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 14:53:48,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 14:53:48,415 INFO L87 Difference]: Start difference. First operand 114 states and 330 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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) [2021-05-03 14:53:48,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:48,432 INFO L93 Difference]: Finished difference Result 171 states and 460 transitions. [2021-05-03 14:53:48,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 14:53:48,432 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 [2021-05-03 14:53:48,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:48,433 INFO L225 Difference]: With dead ends: 171 [2021-05-03 14:53:48,433 INFO L226 Difference]: Without dead ends: 165 [2021-05-03 14:53:48,433 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:53:48,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-05-03 14:53:48,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 110. [2021-05-03 14:53:48,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.908256880733945) internal successors, (317), 109 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:48,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 317 transitions. [2021-05-03 14:53:48,437 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 317 transitions. Word has length 16 [2021-05-03 14:53:48,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:48,437 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 317 transitions. [2021-05-03 14:53:48,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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) [2021-05-03 14:53:48,437 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 317 transitions. [2021-05-03 14:53:48,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:53:48,437 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:48,438 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:48,438 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-03 14:53:48,438 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:48,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:48,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1372165464, now seen corresponding path program 2 times [2021-05-03 14:53:48,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:48,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801511449] [2021-05-03 14:53:48,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:48,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:48,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:48,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801511449] [2021-05-03 14:53:48,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:48,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 14:53:48,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383561433] [2021-05-03 14:53:48,452 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 14:53:48,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:48,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 14:53:48,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 14:53:48,453 INFO L87 Difference]: Start difference. First operand 110 states and 317 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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) [2021-05-03 14:53:48,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:48,469 INFO L93 Difference]: Finished difference Result 179 states and 482 transitions. [2021-05-03 14:53:48,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 14:53:48,470 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 [2021-05-03 14:53:48,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:48,471 INFO L225 Difference]: With dead ends: 179 [2021-05-03 14:53:48,471 INFO L226 Difference]: Without dead ends: 164 [2021-05-03 14:53:48,471 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:53:48,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-05-03 14:53:48,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 114. [2021-05-03 14:53:48,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.8584070796460175) internal successors, (323), 113 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:48,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 323 transitions. [2021-05-03 14:53:48,475 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 323 transitions. Word has length 16 [2021-05-03 14:53:48,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:48,475 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 323 transitions. [2021-05-03 14:53:48,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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) [2021-05-03 14:53:48,475 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 323 transitions. [2021-05-03 14:53:48,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:53:48,476 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:48,476 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:48,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-03 14:53:48,476 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:48,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:48,476 INFO L82 PathProgramCache]: Analyzing trace with hash -507426732, now seen corresponding path program 3 times [2021-05-03 14:53:48,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:48,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104859983] [2021-05-03 14:53:48,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:48,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:48,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:48,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104859983] [2021-05-03 14:53:48,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:48,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 14:53:48,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755530525] [2021-05-03 14:53:48,493 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 14:53:48,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:48,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 14:53:48,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 14:53:48,494 INFO L87 Difference]: Start difference. First operand 114 states and 323 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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) [2021-05-03 14:53:48,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:48,507 INFO L93 Difference]: Finished difference Result 156 states and 416 transitions. [2021-05-03 14:53:48,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 14:53:48,507 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 [2021-05-03 14:53:48,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:48,508 INFO L225 Difference]: With dead ends: 156 [2021-05-03 14:53:48,508 INFO L226 Difference]: Without dead ends: 146 [2021-05-03 14:53:48,509 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:53:48,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-05-03 14:53:48,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 110. [2021-05-03 14:53:48,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.889908256880734) internal successors, (315), 109 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:48,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 315 transitions. [2021-05-03 14:53:48,528 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 315 transitions. Word has length 16 [2021-05-03 14:53:48,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:48,528 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 315 transitions. [2021-05-03 14:53:48,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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) [2021-05-03 14:53:48,530 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 315 transitions. [2021-05-03 14:53:48,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:53:48,531 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:48,531 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:48,531 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-03 14:53:48,531 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:48,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:48,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1294148210, now seen corresponding path program 4 times [2021-05-03 14:53:48,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:48,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518608978] [2021-05-03 14:53:48,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:48,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:48,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:48,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518608978] [2021-05-03 14:53:48,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:48,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 14:53:48,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900421410] [2021-05-03 14:53:48,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 14:53:48,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:48,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 14:53:48,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 14:53:48,552 INFO L87 Difference]: Start difference. First operand 110 states and 315 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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) [2021-05-03 14:53:48,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:48,563 INFO L93 Difference]: Finished difference Result 151 states and 405 transitions. [2021-05-03 14:53:48,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 14:53:48,564 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 [2021-05-03 14:53:48,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:48,565 INFO L225 Difference]: With dead ends: 151 [2021-05-03 14:53:48,565 INFO L226 Difference]: Without dead ends: 145 [2021-05-03 14:53:48,565 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:53:48,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-03 14:53:48,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 110. [2021-05-03 14:53:48,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.8623853211009176) internal successors, (312), 109 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:48,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 312 transitions. [2021-05-03 14:53:48,569 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 312 transitions. Word has length 16 [2021-05-03 14:53:48,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:48,569 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 312 transitions. [2021-05-03 14:53:48,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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) [2021-05-03 14:53:48,569 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 312 transitions. [2021-05-03 14:53:48,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:53:48,569 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:48,569 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:48,570 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-03 14:53:48,570 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:48,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:48,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1904685263, now seen corresponding path program 4 times [2021-05-03 14:53:48,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:48,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691048926] [2021-05-03 14:53:48,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:48,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:48,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:48,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691048926] [2021-05-03 14:53:48,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:48,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 14:53:48,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456307435] [2021-05-03 14:53:48,590 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 14:53:48,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:48,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 14:53:48,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 14:53:48,592 INFO L87 Difference]: Start difference. First operand 110 states and 312 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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) [2021-05-03 14:53:48,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:48,602 INFO L93 Difference]: Finished difference Result 116 states and 321 transitions. [2021-05-03 14:53:48,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 14:53:48,602 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 [2021-05-03 14:53:48,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:48,603 INFO L225 Difference]: With dead ends: 116 [2021-05-03 14:53:48,603 INFO L226 Difference]: Without dead ends: 108 [2021-05-03 14:53:48,603 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:53:48,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-03 14:53:48,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-05-03 14:53:48,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.878504672897196) internal successors, (308), 107 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:48,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 308 transitions. [2021-05-03 14:53:48,606 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 308 transitions. Word has length 16 [2021-05-03 14:53:48,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:48,606 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 308 transitions. [2021-05-03 14:53:48,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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) [2021-05-03 14:53:48,606 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 308 transitions. [2021-05-03 14:53:48,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:53:48,607 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:48,607 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:48,607 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-03 14:53:48,607 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:48,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:48,607 INFO L82 PathProgramCache]: Analyzing trace with hash -524445326, now seen corresponding path program 1 times [2021-05-03 14:53:48,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:48,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578986396] [2021-05-03 14:53:48,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:48,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:48,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:48,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578986396] [2021-05-03 14:53:48,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:48,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:53:48,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321304877] [2021-05-03 14:53:48,670 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:53:48,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:48,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:53:48,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:53:48,671 INFO L87 Difference]: Start difference. First operand 108 states and 308 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:48,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:48,793 INFO L93 Difference]: Finished difference Result 265 states and 721 transitions. [2021-05-03 14:53:48,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:53:48,794 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:53:48,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:48,795 INFO L225 Difference]: With dead ends: 265 [2021-05-03 14:53:48,795 INFO L226 Difference]: Without dead ends: 250 [2021-05-03 14:53:48,795 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 112.4ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:53:48,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-05-03 14:53:48,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 141. [2021-05-03 14:53:48,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.7928571428571427) internal successors, (391), 140 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:48,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 391 transitions. [2021-05-03 14:53:48,799 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 391 transitions. Word has length 17 [2021-05-03 14:53:48,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:48,799 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 391 transitions. [2021-05-03 14:53:48,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:48,800 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 391 transitions. [2021-05-03 14:53:48,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:53:48,800 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:48,800 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:48,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-05-03 14:53:48,800 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:48,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:48,801 INFO L82 PathProgramCache]: Analyzing trace with hash 683107746, now seen corresponding path program 2 times [2021-05-03 14:53:48,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:48,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169814213] [2021-05-03 14:53:48,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:48,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:48,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:48,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169814213] [2021-05-03 14:53:48,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:48,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:53:48,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009032275] [2021-05-03 14:53:48,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:53:48,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:48,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:53:48,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:53:48,864 INFO L87 Difference]: Start difference. First operand 141 states and 391 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:49,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:49,036 INFO L93 Difference]: Finished difference Result 298 states and 795 transitions. [2021-05-03 14:53:49,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:53:49,036 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:53:49,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:49,039 INFO L225 Difference]: With dead ends: 298 [2021-05-03 14:53:49,039 INFO L226 Difference]: Without dead ends: 283 [2021-05-03 14:53:49,039 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 157.3ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:53:49,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-05-03 14:53:49,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 150. [2021-05-03 14:53:49,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.8053691275167787) internal successors, (418), 149 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:49,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 418 transitions. [2021-05-03 14:53:49,048 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 418 transitions. Word has length 17 [2021-05-03 14:53:49,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:49,048 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 418 transitions. [2021-05-03 14:53:49,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:49,048 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 418 transitions. [2021-05-03 14:53:49,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:53:49,049 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:49,049 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:49,049 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-05-03 14:53:49,049 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:49,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:49,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1015612642, now seen corresponding path program 3 times [2021-05-03 14:53:49,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:49,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707851865] [2021-05-03 14:53:49,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:49,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:49,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:49,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707851865] [2021-05-03 14:53:49,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:49,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:53:49,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080047764] [2021-05-03 14:53:49,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:53:49,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:49,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:53:49,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:53:49,140 INFO L87 Difference]: Start difference. First operand 150 states and 418 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:49,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:49,320 INFO L93 Difference]: Finished difference Result 281 states and 763 transitions. [2021-05-03 14:53:49,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:53:49,320 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:53:49,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:49,321 INFO L225 Difference]: With dead ends: 281 [2021-05-03 14:53:49,322 INFO L226 Difference]: Without dead ends: 266 [2021-05-03 14:53:49,322 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 153.9ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:53:49,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-05-03 14:53:49,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 150. [2021-05-03 14:53:49,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.8053691275167787) internal successors, (418), 149 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:49,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 418 transitions. [2021-05-03 14:53:49,327 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 418 transitions. Word has length 17 [2021-05-03 14:53:49,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:49,327 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 418 transitions. [2021-05-03 14:53:49,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:49,327 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 418 transitions. [2021-05-03 14:53:49,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:53:49,327 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:49,327 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:49,328 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-05-03 14:53:49,328 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:49,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:49,328 INFO L82 PathProgramCache]: Analyzing trace with hash 173653428, now seen corresponding path program 4 times [2021-05-03 14:53:49,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:49,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521885019] [2021-05-03 14:53:49,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:49,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:49,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:49,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521885019] [2021-05-03 14:53:49,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:49,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:53:49,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241861151] [2021-05-03 14:53:49,410 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:53:49,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:49,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:53:49,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:53:49,411 INFO L87 Difference]: Start difference. First operand 150 states and 418 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:49,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:49,557 INFO L93 Difference]: Finished difference Result 289 states and 784 transitions. [2021-05-03 14:53:49,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:53:49,557 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:53:49,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:49,558 INFO L225 Difference]: With dead ends: 289 [2021-05-03 14:53:49,558 INFO L226 Difference]: Without dead ends: 274 [2021-05-03 14:53:49,559 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 126.5ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:53:49,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-05-03 14:53:49,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 159. [2021-05-03 14:53:49,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.7974683544303796) internal successors, (442), 158 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:49,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 442 transitions. [2021-05-03 14:53:49,563 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 442 transitions. Word has length 17 [2021-05-03 14:53:49,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:49,564 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 442 transitions. [2021-05-03 14:53:49,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:49,564 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 442 transitions. [2021-05-03 14:53:49,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:53:49,564 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:49,564 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:49,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-05-03 14:53:49,565 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:49,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:49,565 INFO L82 PathProgramCache]: Analyzing trace with hash 147877944, now seen corresponding path program 5 times [2021-05-03 14:53:49,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:49,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438436399] [2021-05-03 14:53:49,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:49,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:49,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:49,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438436399] [2021-05-03 14:53:49,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:49,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:53:49,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706736236] [2021-05-03 14:53:49,639 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:53:49,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:49,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:53:49,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:53:49,640 INFO L87 Difference]: Start difference. First operand 159 states and 442 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:49,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:49,836 INFO L93 Difference]: Finished difference Result 322 states and 859 transitions. [2021-05-03 14:53:49,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:53:49,836 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:53:49,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:49,838 INFO L225 Difference]: With dead ends: 322 [2021-05-03 14:53:49,838 INFO L226 Difference]: Without dead ends: 307 [2021-05-03 14:53:49,838 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 180.8ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:53:49,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-05-03 14:53:49,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 162. [2021-05-03 14:53:49,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.8322981366459627) internal successors, (456), 161 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:49,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 456 transitions. [2021-05-03 14:53:49,843 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 456 transitions. Word has length 17 [2021-05-03 14:53:49,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:49,843 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 456 transitions. [2021-05-03 14:53:49,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:49,843 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 456 transitions. [2021-05-03 14:53:49,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:53:49,844 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:49,844 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:49,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-05-03 14:53:49,844 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:49,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:49,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1550842444, now seen corresponding path program 6 times [2021-05-03 14:53:49,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:49,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479087488] [2021-05-03 14:53:49,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:49,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:49,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:49,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479087488] [2021-05-03 14:53:49,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:49,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:53:49,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542840438] [2021-05-03 14:53:49,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:53:49,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:49,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:53:49,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:53:49,927 INFO L87 Difference]: Start difference. First operand 162 states and 456 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:50,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:50,108 INFO L93 Difference]: Finished difference Result 299 states and 814 transitions. [2021-05-03 14:53:50,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:53:50,108 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:53:50,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:50,109 INFO L225 Difference]: With dead ends: 299 [2021-05-03 14:53:50,109 INFO L226 Difference]: Without dead ends: 284 [2021-05-03 14:53:50,109 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 153.8ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:53:50,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-05-03 14:53:50,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 159. [2021-05-03 14:53:50,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.7974683544303796) internal successors, (442), 158 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:50,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 442 transitions. [2021-05-03 14:53:50,114 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 442 transitions. Word has length 17 [2021-05-03 14:53:50,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:50,114 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 442 transitions. [2021-05-03 14:53:50,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:50,114 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 442 transitions. [2021-05-03 14:53:50,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:53:50,114 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:50,114 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:50,114 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-05-03 14:53:50,114 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:50,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:50,115 INFO L82 PathProgramCache]: Analyzing trace with hash -2035892590, now seen corresponding path program 7 times [2021-05-03 14:53:50,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:50,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039358890] [2021-05-03 14:53:50,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:50,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:50,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:50,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039358890] [2021-05-03 14:53:50,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:50,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:53:50,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555288325] [2021-05-03 14:53:50,171 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:53:50,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:50,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:53:50,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:53:50,172 INFO L87 Difference]: Start difference. First operand 159 states and 442 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:50,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:50,351 INFO L93 Difference]: Finished difference Result 389 states and 1040 transitions. [2021-05-03 14:53:50,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:53:50,351 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:53:50,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:50,352 INFO L225 Difference]: With dead ends: 389 [2021-05-03 14:53:50,352 INFO L226 Difference]: Without dead ends: 374 [2021-05-03 14:53:50,353 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 160.7ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:53:50,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-05-03 14:53:50,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 166. [2021-05-03 14:53:50,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.8484848484848486) internal successors, (470), 165 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:50,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 470 transitions. [2021-05-03 14:53:50,358 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 470 transitions. Word has length 17 [2021-05-03 14:53:50,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:50,358 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 470 transitions. [2021-05-03 14:53:50,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:50,358 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 470 transitions. [2021-05-03 14:53:50,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:53:50,359 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:50,359 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:50,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-05-03 14:53:50,359 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:50,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:50,359 INFO L82 PathProgramCache]: Analyzing trace with hash -828339518, now seen corresponding path program 8 times [2021-05-03 14:53:50,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:50,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497617575] [2021-05-03 14:53:50,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:50,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:50,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:50,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497617575] [2021-05-03 14:53:50,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:50,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:53:50,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847872612] [2021-05-03 14:53:50,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:53:50,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:50,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:53:50,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:53:50,428 INFO L87 Difference]: Start difference. First operand 166 states and 470 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:50,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:50,614 INFO L93 Difference]: Finished difference Result 398 states and 1066 transitions. [2021-05-03 14:53:50,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:53:50,614 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:53:50,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:50,617 INFO L225 Difference]: With dead ends: 398 [2021-05-03 14:53:50,618 INFO L226 Difference]: Without dead ends: 383 [2021-05-03 14:53:50,618 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 175.5ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:53:50,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-05-03 14:53:50,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 169. [2021-05-03 14:53:50,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.880952380952381) internal successors, (484), 168 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:50,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 484 transitions. [2021-05-03 14:53:50,624 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 484 transitions. Word has length 17 [2021-05-03 14:53:50,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:50,624 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 484 transitions. [2021-05-03 14:53:50,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:50,625 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 484 transitions. [2021-05-03 14:53:50,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:53:50,625 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:50,626 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:50,626 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-05-03 14:53:50,626 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:50,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:50,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1767907390, now seen corresponding path program 9 times [2021-05-03 14:53:50,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:50,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387416442] [2021-05-03 14:53:50,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:50,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:50,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:50,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387416442] [2021-05-03 14:53:50,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:50,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:53:50,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457457534] [2021-05-03 14:53:50,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:53:50,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:50,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:53:50,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:53:50,702 INFO L87 Difference]: Start difference. First operand 169 states and 484 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:50,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:50,898 INFO L93 Difference]: Finished difference Result 405 states and 1082 transitions. [2021-05-03 14:53:50,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:53:50,899 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:53:50,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:50,900 INFO L225 Difference]: With dead ends: 405 [2021-05-03 14:53:50,900 INFO L226 Difference]: Without dead ends: 390 [2021-05-03 14:53:50,901 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 177.3ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:53:50,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-05-03 14:53:50,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 161. [2021-05-03 14:53:50,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.825) internal successors, (452), 160 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:50,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 452 transitions. [2021-05-03 14:53:50,905 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 452 transitions. Word has length 17 [2021-05-03 14:53:50,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:50,906 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 452 transitions. [2021-05-03 14:53:50,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:50,906 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 452 transitions. [2021-05-03 14:53:50,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:53:50,906 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:50,906 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:50,906 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-05-03 14:53:50,906 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:50,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:50,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1043349262, now seen corresponding path program 10 times [2021-05-03 14:53:50,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:50,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704737406] [2021-05-03 14:53:50,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:50,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:50,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:50,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704737406] [2021-05-03 14:53:50,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:50,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:53:50,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663826431] [2021-05-03 14:53:50,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:53:50,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:50,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:53:50,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:53:50,952 INFO L87 Difference]: Start difference. First operand 161 states and 452 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:51,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:51,076 INFO L93 Difference]: Finished difference Result 340 states and 918 transitions. [2021-05-03 14:53:51,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:53:51,077 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:53:51,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:51,078 INFO L225 Difference]: With dead ends: 340 [2021-05-03 14:53:51,078 INFO L226 Difference]: Without dead ends: 325 [2021-05-03 14:53:51,078 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 80.4ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:53:51,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-05-03 14:53:51,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 165. [2021-05-03 14:53:51,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.841463414634146) internal successors, (466), 164 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:51,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 466 transitions. [2021-05-03 14:53:51,090 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 466 transitions. Word has length 17 [2021-05-03 14:53:51,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:51,090 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 466 transitions. [2021-05-03 14:53:51,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:51,090 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 466 transitions. [2021-05-03 14:53:51,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:53:51,091 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:51,091 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:51,091 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-05-03 14:53:51,091 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:51,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:51,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1480345592, now seen corresponding path program 11 times [2021-05-03 14:53:51,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:51,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812383960] [2021-05-03 14:53:51,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:51,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:51,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:51,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812383960] [2021-05-03 14:53:51,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:51,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:53:51,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496702792] [2021-05-03 14:53:51,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:53:51,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:51,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:53:51,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:53:51,155 INFO L87 Difference]: Start difference. First operand 165 states and 466 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:51,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:51,286 INFO L93 Difference]: Finished difference Result 335 states and 909 transitions. [2021-05-03 14:53:51,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:53:51,287 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:53:51,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:51,288 INFO L225 Difference]: With dead ends: 335 [2021-05-03 14:53:51,288 INFO L226 Difference]: Without dead ends: 320 [2021-05-03 14:53:51,288 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 115.0ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:53:51,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-05-03 14:53:51,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 171. [2021-05-03 14:53:51,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.8411764705882354) internal successors, (483), 170 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:51,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 483 transitions. [2021-05-03 14:53:51,296 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 483 transitions. Word has length 17 [2021-05-03 14:53:51,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:51,296 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 483 transitions. [2021-05-03 14:53:51,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:51,296 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 483 transitions. [2021-05-03 14:53:51,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:53:51,296 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:51,296 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:51,297 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-05-03 14:53:51,297 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:51,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:51,297 INFO L82 PathProgramCache]: Analyzing trace with hash -145439044, now seen corresponding path program 12 times [2021-05-03 14:53:51,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:51,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235812796] [2021-05-03 14:53:51,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:51,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:51,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:51,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235812796] [2021-05-03 14:53:51,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:51,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:53:51,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709872310] [2021-05-03 14:53:51,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:53:51,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:51,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:53:51,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:53:51,352 INFO L87 Difference]: Start difference. First operand 171 states and 483 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:51,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:51,482 INFO L93 Difference]: Finished difference Result 318 states and 879 transitions. [2021-05-03 14:53:51,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:53:51,483 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:53:51,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:51,484 INFO L225 Difference]: With dead ends: 318 [2021-05-03 14:53:51,484 INFO L226 Difference]: Without dead ends: 303 [2021-05-03 14:53:51,484 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 96.1ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:53:51,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-05-03 14:53:51,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 171. [2021-05-03 14:53:51,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.8411764705882354) internal successors, (483), 170 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:51,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 483 transitions. [2021-05-03 14:53:51,488 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 483 transitions. Word has length 17 [2021-05-03 14:53:51,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:51,488 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 483 transitions. [2021-05-03 14:53:51,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:51,489 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 483 transitions. [2021-05-03 14:53:51,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:53:51,489 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:51,489 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:51,489 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-05-03 14:53:51,489 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:51,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:51,490 INFO L82 PathProgramCache]: Analyzing trace with hash 161256120, now seen corresponding path program 13 times [2021-05-03 14:53:51,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:51,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384786936] [2021-05-03 14:53:51,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:51,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:51,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:51,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384786936] [2021-05-03 14:53:51,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:51,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:53:51,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547562900] [2021-05-03 14:53:51,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:53:51,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:51,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:53:51,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:53:51,546 INFO L87 Difference]: Start difference. First operand 171 states and 483 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:51,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:51,670 INFO L93 Difference]: Finished difference Result 385 states and 1046 transitions. [2021-05-03 14:53:51,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:53:51,671 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:53:51,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:51,672 INFO L225 Difference]: With dead ends: 385 [2021-05-03 14:53:51,672 INFO L226 Difference]: Without dead ends: 370 [2021-05-03 14:53:51,672 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 103.6ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:53:51,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-05-03 14:53:51,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 174. [2021-05-03 14:53:51,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.878612716763006) internal successors, (498), 173 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:51,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 498 transitions. [2021-05-03 14:53:51,677 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 498 transitions. Word has length 17 [2021-05-03 14:53:51,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:51,677 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 498 transitions. [2021-05-03 14:53:51,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:51,677 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 498 transitions. [2021-05-03 14:53:51,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:53:51,677 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:51,678 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:51,678 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-05-03 14:53:51,678 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:51,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:51,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1057379240, now seen corresponding path program 14 times [2021-05-03 14:53:51,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:51,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881209470] [2021-05-03 14:53:51,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:51,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:51,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:51,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881209470] [2021-05-03 14:53:51,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:51,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:53:51,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222885950] [2021-05-03 14:53:51,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:53:51,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:51,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:53:51,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:53:51,736 INFO L87 Difference]: Start difference. First operand 174 states and 498 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:51,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:51,863 INFO L93 Difference]: Finished difference Result 383 states and 1039 transitions. [2021-05-03 14:53:51,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:53:51,863 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:53:51,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:51,865 INFO L225 Difference]: With dead ends: 383 [2021-05-03 14:53:51,865 INFO L226 Difference]: Without dead ends: 368 [2021-05-03 14:53:51,865 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 89.9ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:53:51,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-05-03 14:53:51,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 174. [2021-05-03 14:53:51,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.878612716763006) internal successors, (498), 173 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:51,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 498 transitions. [2021-05-03 14:53:51,869 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 498 transitions. Word has length 17 [2021-05-03 14:53:51,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:51,869 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 498 transitions. [2021-05-03 14:53:51,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:51,869 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 498 transitions. [2021-05-03 14:53:51,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:53:51,869 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:51,869 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:51,869 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-05-03 14:53:51,869 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:51,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:51,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1150316668, now seen corresponding path program 15 times [2021-05-03 14:53:51,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:51,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736418866] [2021-05-03 14:53:51,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:51,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:51,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:51,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736418866] [2021-05-03 14:53:51,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:51,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:53:51,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672601031] [2021-05-03 14:53:51,960 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:53:51,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:51,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:53:51,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:53:51,960 INFO L87 Difference]: Start difference. First operand 174 states and 498 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:52,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:52,125 INFO L93 Difference]: Finished difference Result 392 states and 1055 transitions. [2021-05-03 14:53:52,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:53:52,125 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:53:52,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:52,126 INFO L225 Difference]: With dead ends: 392 [2021-05-03 14:53:52,127 INFO L226 Difference]: Without dead ends: 377 [2021-05-03 14:53:52,127 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 146.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:53:52,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-05-03 14:53:52,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 177. [2021-05-03 14:53:52,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.909090909090909) internal successors, (512), 176 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:52,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 512 transitions. [2021-05-03 14:53:52,131 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 512 transitions. Word has length 17 [2021-05-03 14:53:52,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:52,131 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 512 transitions. [2021-05-03 14:53:52,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:52,131 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 512 transitions. [2021-05-03 14:53:52,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:53:52,132 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:52,132 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:52,132 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-05-03 14:53:52,132 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:52,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:52,132 INFO L82 PathProgramCache]: Analyzing trace with hash -19872328, now seen corresponding path program 16 times [2021-05-03 14:53:52,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:52,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912696468] [2021-05-03 14:53:52,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:52,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:52,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:52,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912696468] [2021-05-03 14:53:52,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:52,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:53:52,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690590714] [2021-05-03 14:53:52,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:53:52,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:52,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:53:52,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:53:52,192 INFO L87 Difference]: Start difference. First operand 177 states and 512 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:52,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:52,361 INFO L93 Difference]: Finished difference Result 376 states and 1032 transitions. [2021-05-03 14:53:52,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:53:52,362 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:53:52,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:52,363 INFO L225 Difference]: With dead ends: 376 [2021-05-03 14:53:52,363 INFO L226 Difference]: Without dead ends: 361 [2021-05-03 14:53:52,363 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 139.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:53:52,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-05-03 14:53:52,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 174. [2021-05-03 14:53:52,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.878612716763006) internal successors, (498), 173 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:52,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 498 transitions. [2021-05-03 14:53:52,367 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 498 transitions. Word has length 17 [2021-05-03 14:53:52,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:52,368 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 498 transitions. [2021-05-03 14:53:52,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:52,368 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 498 transitions. [2021-05-03 14:53:52,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:53:52,368 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:52,368 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:52,368 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-05-03 14:53:52,368 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:52,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:52,369 INFO L82 PathProgramCache]: Analyzing trace with hash -36809380, now seen corresponding path program 17 times [2021-05-03 14:53:52,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:52,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453128866] [2021-05-03 14:53:52,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:52,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:52,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:52,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453128866] [2021-05-03 14:53:52,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:52,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:53:52,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591990277] [2021-05-03 14:53:52,418 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:53:52,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:52,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:53:52,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:53:52,419 INFO L87 Difference]: Start difference. First operand 174 states and 498 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:52,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:52,550 INFO L93 Difference]: Finished difference Result 364 states and 991 transitions. [2021-05-03 14:53:52,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:53:52,550 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:53:52,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:52,552 INFO L225 Difference]: With dead ends: 364 [2021-05-03 14:53:52,552 INFO L226 Difference]: Without dead ends: 349 [2021-05-03 14:53:52,552 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 98.8ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:53:52,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-05-03 14:53:52,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 176. [2021-05-03 14:53:52,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.8971428571428572) internal successors, (507), 175 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:52,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 507 transitions. [2021-05-03 14:53:52,556 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 507 transitions. Word has length 17 [2021-05-03 14:53:52,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:52,556 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 507 transitions. [2021-05-03 14:53:52,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:52,556 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 507 transitions. [2021-05-03 14:53:52,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:53:52,557 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:52,557 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:52,557 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-05-03 14:53:52,557 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:52,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:52,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1103474456, now seen corresponding path program 18 times [2021-05-03 14:53:52,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:52,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957036698] [2021-05-03 14:53:52,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:52,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:52,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:52,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957036698] [2021-05-03 14:53:52,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:52,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:53:52,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490918407] [2021-05-03 14:53:52,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:53:52,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:52,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:53:52,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:53:52,606 INFO L87 Difference]: Start difference. First operand 176 states and 507 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:52,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:52,746 INFO L93 Difference]: Finished difference Result 343 states and 953 transitions. [2021-05-03 14:53:52,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:53:52,746 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:53:52,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:52,747 INFO L225 Difference]: With dead ends: 343 [2021-05-03 14:53:52,747 INFO L226 Difference]: Without dead ends: 328 [2021-05-03 14:53:52,747 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 102.0ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:53:52,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-05-03 14:53:52,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 174. [2021-05-03 14:53:52,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.878612716763006) internal successors, (498), 173 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:52,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 498 transitions. [2021-05-03 14:53:52,751 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 498 transitions. Word has length 17 [2021-05-03 14:53:52,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:52,751 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 498 transitions. [2021-05-03 14:53:52,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:52,751 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 498 transitions. [2021-05-03 14:53:52,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:53:52,751 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:52,752 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:52,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-05-03 14:53:52,752 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:52,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:52,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1622951230, now seen corresponding path program 19 times [2021-05-03 14:53:52,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:52,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568873869] [2021-05-03 14:53:52,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:52,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:52,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:52,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568873869] [2021-05-03 14:53:52,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:52,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:53:52,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710976784] [2021-05-03 14:53:52,801 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:53:52,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:52,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:53:52,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:53:52,801 INFO L87 Difference]: Start difference. First operand 174 states and 498 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:52,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:52,900 INFO L93 Difference]: Finished difference Result 360 states and 983 transitions. [2021-05-03 14:53:52,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:53:52,900 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:53:52,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:52,901 INFO L225 Difference]: With dead ends: 360 [2021-05-03 14:53:52,902 INFO L226 Difference]: Without dead ends: 345 [2021-05-03 14:53:52,902 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 82.2ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:53:52,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-05-03 14:53:52,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 177. [2021-05-03 14:53:52,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.897727272727273) internal successors, (510), 176 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:52,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 510 transitions. [2021-05-03 14:53:52,906 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 510 transitions. Word has length 17 [2021-05-03 14:53:52,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:52,906 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 510 transitions. [2021-05-03 14:53:52,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:52,906 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 510 transitions. [2021-05-03 14:53:52,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:53:52,906 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:52,907 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:52,907 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-05-03 14:53:52,907 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:52,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:52,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1422092646, now seen corresponding path program 20 times [2021-05-03 14:53:52,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:52,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038400792] [2021-05-03 14:53:52,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:52,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:52,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:52,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038400792] [2021-05-03 14:53:52,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:52,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:53:52,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298878881] [2021-05-03 14:53:52,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:53:52,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:52,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:53:52,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:53:52,953 INFO L87 Difference]: Start difference. First operand 177 states and 510 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:53,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:53,094 INFO L93 Difference]: Finished difference Result 377 states and 1017 transitions. [2021-05-03 14:53:53,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:53:53,094 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:53:53,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:53,095 INFO L225 Difference]: With dead ends: 377 [2021-05-03 14:53:53,095 INFO L226 Difference]: Without dead ends: 362 [2021-05-03 14:53:53,096 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 107.8ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:53:53,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-05-03 14:53:53,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 179. [2021-05-03 14:53:53,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.9157303370786516) internal successors, (519), 178 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:53,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 519 transitions. [2021-05-03 14:53:53,100 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 519 transitions. Word has length 17 [2021-05-03 14:53:53,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:53,100 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 519 transitions. [2021-05-03 14:53:53,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:53,100 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 519 transitions. [2021-05-03 14:53:53,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:53:53,100 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:53,100 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:53,100 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-05-03 14:53:53,100 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:53,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:53,101 INFO L82 PathProgramCache]: Analyzing trace with hash 203457286, now seen corresponding path program 21 times [2021-05-03 14:53:53,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:53,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403734648] [2021-05-03 14:53:53,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:53,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:53,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:53,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403734648] [2021-05-03 14:53:53,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:53,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:53:53,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895249589] [2021-05-03 14:53:53,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:53:53,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:53,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:53:53,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:53:53,150 INFO L87 Difference]: Start difference. First operand 179 states and 519 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:53,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:53,279 INFO L93 Difference]: Finished difference Result 354 states and 972 transitions. [2021-05-03 14:53:53,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:53:53,279 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:53:53,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:53,280 INFO L225 Difference]: With dead ends: 354 [2021-05-03 14:53:53,280 INFO L226 Difference]: Without dead ends: 339 [2021-05-03 14:53:53,280 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 108.1ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:53:53,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-05-03 14:53:53,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 177. [2021-05-03 14:53:53,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.897727272727273) internal successors, (510), 176 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:53,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 510 transitions. [2021-05-03 14:53:53,285 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 510 transitions. Word has length 17 [2021-05-03 14:53:53,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:53,285 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 510 transitions. [2021-05-03 14:53:53,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:53,285 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 510 transitions. [2021-05-03 14:53:53,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:53:53,285 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:53,285 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:53,285 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-05-03 14:53:53,286 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:53,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:53,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1026845314, now seen corresponding path program 22 times [2021-05-03 14:53:53,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:53,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438424286] [2021-05-03 14:53:53,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:53,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:53,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:53,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438424286] [2021-05-03 14:53:53,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:53,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:53:53,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103474785] [2021-05-03 14:53:53,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:53:53,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:53,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:53:53,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:53:53,345 INFO L87 Difference]: Start difference. First operand 177 states and 510 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:53,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:53,507 INFO L93 Difference]: Finished difference Result 409 states and 1106 transitions. [2021-05-03 14:53:53,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:53:53,508 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:53:53,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:53,509 INFO L225 Difference]: With dead ends: 409 [2021-05-03 14:53:53,509 INFO L226 Difference]: Without dead ends: 394 [2021-05-03 14:53:53,509 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 142.6ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:53:53,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-05-03 14:53:53,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 180. [2021-05-03 14:53:53,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.910614525139665) internal successors, (521), 179 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:53,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 521 transitions. [2021-05-03 14:53:53,513 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 521 transitions. Word has length 17 [2021-05-03 14:53:53,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:53,514 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 521 transitions. [2021-05-03 14:53:53,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:53,514 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 521 transitions. [2021-05-03 14:53:53,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:53:53,514 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:53,514 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:53,514 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-05-03 14:53:53,514 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:53,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:53,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1848016830, now seen corresponding path program 23 times [2021-05-03 14:53:53,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:53,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078183937] [2021-05-03 14:53:53,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:53,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:53,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:53,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078183937] [2021-05-03 14:53:53,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:53,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:53:53,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600358165] [2021-05-03 14:53:53,579 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:53:53,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:53,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:53:53,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:53:53,579 INFO L87 Difference]: Start difference. First operand 180 states and 521 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:53,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:53,763 INFO L93 Difference]: Finished difference Result 407 states and 1110 transitions. [2021-05-03 14:53:53,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:53:53,763 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:53:53,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:53,764 INFO L225 Difference]: With dead ends: 407 [2021-05-03 14:53:53,764 INFO L226 Difference]: Without dead ends: 392 [2021-05-03 14:53:53,765 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 162.6ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:53:53,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-05-03 14:53:53,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 183. [2021-05-03 14:53:53,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.9395604395604398) internal successors, (535), 182 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:53,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 535 transitions. [2021-05-03 14:53:53,769 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 535 transitions. Word has length 17 [2021-05-03 14:53:53,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:53,769 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 535 transitions. [2021-05-03 14:53:53,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:53,769 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 535 transitions. [2021-05-03 14:53:53,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:53:53,770 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:53,770 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:53,770 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-05-03 14:53:53,770 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:53,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:53,770 INFO L82 PathProgramCache]: Analyzing trace with hash 748230078, now seen corresponding path program 24 times [2021-05-03 14:53:53,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:53,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866835073] [2021-05-03 14:53:53,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:53,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:53,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:53,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866835073] [2021-05-03 14:53:53,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:53,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:53:53,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612483690] [2021-05-03 14:53:53,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:53:53,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:53,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:53:53,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:53:53,831 INFO L87 Difference]: Start difference. First operand 183 states and 535 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:54,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:54,047 INFO L93 Difference]: Finished difference Result 384 states and 1065 transitions. [2021-05-03 14:53:54,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:53:54,047 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:53:54,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:54,049 INFO L225 Difference]: With dead ends: 384 [2021-05-03 14:53:54,049 INFO L226 Difference]: Without dead ends: 369 [2021-05-03 14:53:54,049 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 182.0ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:53:54,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-05-03 14:53:54,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 177. [2021-05-03 14:53:54,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.897727272727273) internal successors, (510), 176 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:54,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 510 transitions. [2021-05-03 14:53:54,053 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 510 transitions. Word has length 17 [2021-05-03 14:53:54,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:54,053 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 510 transitions. [2021-05-03 14:53:54,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:54,053 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 510 transitions. [2021-05-03 14:53:54,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:53:54,054 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:54,054 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:54,054 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-05-03 14:53:54,054 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:54,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:54,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1951172510, now seen corresponding path program 25 times [2021-05-03 14:53:54,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:54,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091687075] [2021-05-03 14:53:54,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:54,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:54,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:54,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091687075] [2021-05-03 14:53:54,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:54,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:53:54,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174202692] [2021-05-03 14:53:54,105 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:53:54,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:54,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:53:54,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:53:54,106 INFO L87 Difference]: Start difference. First operand 177 states and 510 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:54,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:54,238 INFO L93 Difference]: Finished difference Result 403 states and 1103 transitions. [2021-05-03 14:53:54,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:53:54,238 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:53:54,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:54,240 INFO L225 Difference]: With dead ends: 403 [2021-05-03 14:53:54,240 INFO L226 Difference]: Without dead ends: 388 [2021-05-03 14:53:54,240 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 104.6ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:53:54,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-05-03 14:53:54,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 180. [2021-05-03 14:53:54,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.9329608938547485) internal successors, (525), 179 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:54,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 525 transitions. [2021-05-03 14:53:54,244 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 525 transitions. Word has length 17 [2021-05-03 14:53:54,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:54,244 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 525 transitions. [2021-05-03 14:53:54,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:54,244 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 525 transitions. [2021-05-03 14:53:54,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:53:54,244 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:54,244 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:54,244 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-05-03 14:53:54,244 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:54,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:54,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1125159426, now seen corresponding path program 26 times [2021-05-03 14:53:54,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:54,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488945952] [2021-05-03 14:53:54,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:54,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:54,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:54,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488945952] [2021-05-03 14:53:54,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:54,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:53:54,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746613099] [2021-05-03 14:53:54,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:53:54,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:54,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:53:54,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:53:54,294 INFO L87 Difference]: Start difference. First operand 180 states and 525 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:54,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:54,423 INFO L93 Difference]: Finished difference Result 401 states and 1096 transitions. [2021-05-03 14:53:54,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:53:54,423 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:53:54,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:54,424 INFO L225 Difference]: With dead ends: 401 [2021-05-03 14:53:54,424 INFO L226 Difference]: Without dead ends: 386 [2021-05-03 14:53:54,425 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 99.5ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:53:54,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-05-03 14:53:54,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 178. [2021-05-03 14:53:54,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.9152542372881354) internal successors, (516), 177 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:54,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 516 transitions. [2021-05-03 14:53:54,428 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 516 transitions. Word has length 17 [2021-05-03 14:53:54,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:54,428 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 516 transitions. [2021-05-03 14:53:54,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:54,429 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 516 transitions. [2021-05-03 14:53:54,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:53:54,429 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:54,429 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:54,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-05-03 14:53:54,429 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:54,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:54,429 INFO L82 PathProgramCache]: Analyzing trace with hash -962111962, now seen corresponding path program 27 times [2021-05-03 14:53:54,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:54,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094825322] [2021-05-03 14:53:54,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:54,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:54,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:54,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094825322] [2021-05-03 14:53:54,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:54,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:53:54,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249051387] [2021-05-03 14:53:54,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:53:54,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:54,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:53:54,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:53:54,480 INFO L87 Difference]: Start difference. First operand 178 states and 516 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:54,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:54,645 INFO L93 Difference]: Finished difference Result 395 states and 1075 transitions. [2021-05-03 14:53:54,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:53:54,645 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:53:54,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:54,647 INFO L225 Difference]: With dead ends: 395 [2021-05-03 14:53:54,647 INFO L226 Difference]: Without dead ends: 380 [2021-05-03 14:53:54,647 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 133.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:53:54,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-05-03 14:53:54,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 181. [2021-05-03 14:53:54,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.9444444444444446) internal successors, (530), 180 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:54,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 530 transitions. [2021-05-03 14:53:54,651 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 530 transitions. Word has length 17 [2021-05-03 14:53:54,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:54,651 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 530 transitions. [2021-05-03 14:53:54,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:54,651 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 530 transitions. [2021-05-03 14:53:54,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:53:54,652 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:54,652 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:54,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-05-03 14:53:54,652 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:54,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:54,652 INFO L82 PathProgramCache]: Analyzing trace with hash -2132300958, now seen corresponding path program 28 times [2021-05-03 14:53:54,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:54,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793839324] [2021-05-03 14:53:54,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:54,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:54,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:54,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793839324] [2021-05-03 14:53:54,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:54,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:53:54,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779735606] [2021-05-03 14:53:54,715 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:53:54,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:54,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:53:54,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:53:54,715 INFO L87 Difference]: Start difference. First operand 181 states and 530 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:54,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:54,888 INFO L93 Difference]: Finished difference Result 379 states and 1052 transitions. [2021-05-03 14:53:54,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:53:54,888 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:53:54,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:54,889 INFO L225 Difference]: With dead ends: 379 [2021-05-03 14:53:54,889 INFO L226 Difference]: Without dead ends: 364 [2021-05-03 14:53:54,890 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 137.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:53:54,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-05-03 14:53:54,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 178. [2021-05-03 14:53:54,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.9152542372881354) internal successors, (516), 177 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:54,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 516 transitions. [2021-05-03 14:53:54,893 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 516 transitions. Word has length 17 [2021-05-03 14:53:54,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:54,893 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 516 transitions. [2021-05-03 14:53:54,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:54,894 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 516 transitions. [2021-05-03 14:53:54,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:53:54,894 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:54,894 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:54,894 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-05-03 14:53:54,894 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:54,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:54,895 INFO L82 PathProgramCache]: Analyzing trace with hash 2145729286, now seen corresponding path program 29 times [2021-05-03 14:53:54,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:54,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83179873] [2021-05-03 14:53:54,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:54,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:54,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:54,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83179873] [2021-05-03 14:53:54,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:54,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:53:54,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832470689] [2021-05-03 14:53:54,942 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:53:54,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:54,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:53:54,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:53:54,942 INFO L87 Difference]: Start difference. First operand 178 states and 516 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:55,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:55,082 INFO L93 Difference]: Finished difference Result 363 states and 1003 transitions. [2021-05-03 14:53:55,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:53:55,082 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:53:55,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:55,083 INFO L225 Difference]: With dead ends: 363 [2021-05-03 14:53:55,084 INFO L226 Difference]: Without dead ends: 348 [2021-05-03 14:53:55,084 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 100.0ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:53:55,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-05-03 14:53:55,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 180. [2021-05-03 14:53:55,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.9329608938547485) internal successors, (525), 179 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:55,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 525 transitions. [2021-05-03 14:53:55,088 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 525 transitions. Word has length 17 [2021-05-03 14:53:55,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:55,088 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 525 transitions. [2021-05-03 14:53:55,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:55,088 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 525 transitions. [2021-05-03 14:53:55,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:53:55,088 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:55,088 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:55,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-05-03 14:53:55,089 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:55,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:55,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1008954174, now seen corresponding path program 30 times [2021-05-03 14:53:55,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:55,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609481414] [2021-05-03 14:53:55,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:55,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:55,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:55,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609481414] [2021-05-03 14:53:55,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:55,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:53:55,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612014326] [2021-05-03 14:53:55,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:53:55,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:55,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:53:55,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:53:55,145 INFO L87 Difference]: Start difference. First operand 180 states and 525 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:55,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:55,268 INFO L93 Difference]: Finished difference Result 342 states and 965 transitions. [2021-05-03 14:53:55,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:53:55,268 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:53:55,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:55,269 INFO L225 Difference]: With dead ends: 342 [2021-05-03 14:53:55,269 INFO L226 Difference]: Without dead ends: 327 [2021-05-03 14:53:55,270 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 98.6ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:53:55,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-05-03 14:53:55,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 177. [2021-05-03 14:53:55,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.897727272727273) internal successors, (510), 176 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:55,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 510 transitions. [2021-05-03 14:53:55,273 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 510 transitions. Word has length 17 [2021-05-03 14:53:55,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:55,273 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 510 transitions. [2021-05-03 14:53:55,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:55,274 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 510 transitions. [2021-05-03 14:53:55,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:53:55,274 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:55,274 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:55,274 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-05-03 14:53:55,274 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:55,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:55,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1057121422, now seen corresponding path program 31 times [2021-05-03 14:53:55,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:55,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305697997] [2021-05-03 14:53:55,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:55,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:55,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:55,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305697997] [2021-05-03 14:53:55,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:55,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:53:55,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047136430] [2021-05-03 14:53:55,328 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:53:55,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:55,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:53:55,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:53:55,329 INFO L87 Difference]: Start difference. First operand 177 states and 510 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:55,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:55,505 INFO L93 Difference]: Finished difference Result 377 states and 1036 transitions. [2021-05-03 14:53:55,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:53:55,506 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:53:55,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:55,507 INFO L225 Difference]: With dead ends: 377 [2021-05-03 14:53:55,507 INFO L226 Difference]: Without dead ends: 362 [2021-05-03 14:53:55,507 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 153.9ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:53:55,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-05-03 14:53:55,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 186. [2021-05-03 14:53:55,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.9513513513513514) internal successors, (546), 185 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:55,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 546 transitions. [2021-05-03 14:53:55,511 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 546 transitions. Word has length 17 [2021-05-03 14:53:55,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:55,511 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 546 transitions. [2021-05-03 14:53:55,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:55,511 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 546 transitions. [2021-05-03 14:53:55,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:53:55,511 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:55,511 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:55,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-05-03 14:53:55,512 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:55,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:55,512 INFO L82 PathProgramCache]: Analyzing trace with hash -2030292802, now seen corresponding path program 32 times [2021-05-03 14:53:55,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:55,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62523623] [2021-05-03 14:53:55,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:55,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:55,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:55,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62523623] [2021-05-03 14:53:55,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:55,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:53:55,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310005085] [2021-05-03 14:53:55,567 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:53:55,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:55,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:53:55,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:53:55,568 INFO L87 Difference]: Start difference. First operand 186 states and 546 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:55,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:55,766 INFO L93 Difference]: Finished difference Result 386 states and 1062 transitions. [2021-05-03 14:53:55,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:53:55,767 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:53:55,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:55,768 INFO L225 Difference]: With dead ends: 386 [2021-05-03 14:53:55,768 INFO L226 Difference]: Without dead ends: 371 [2021-05-03 14:53:55,768 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 182.2ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:53:55,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-05-03 14:53:55,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 189. [2021-05-03 14:53:55,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.978723404255319) internal successors, (560), 188 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:55,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 560 transitions. [2021-05-03 14:53:55,772 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 560 transitions. Word has length 17 [2021-05-03 14:53:55,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:55,772 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 560 transitions. [2021-05-03 14:53:55,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:55,772 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 560 transitions. [2021-05-03 14:53:55,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:53:55,772 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:55,772 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:55,772 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-05-03 14:53:55,773 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:55,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:55,773 INFO L82 PathProgramCache]: Analyzing trace with hash 565954106, now seen corresponding path program 33 times [2021-05-03 14:53:55,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:55,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051141646] [2021-05-03 14:53:55,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:55,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:55,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:55,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051141646] [2021-05-03 14:53:55,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:55,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:53:55,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164543385] [2021-05-03 14:53:55,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:53:55,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:55,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:53:55,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:53:55,828 INFO L87 Difference]: Start difference. First operand 189 states and 560 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:56,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:56,011 INFO L93 Difference]: Finished difference Result 393 states and 1078 transitions. [2021-05-03 14:53:56,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:53:56,011 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:53:56,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:56,012 INFO L225 Difference]: With dead ends: 393 [2021-05-03 14:53:56,012 INFO L226 Difference]: Without dead ends: 378 [2021-05-03 14:53:56,013 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 164.6ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:53:56,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-05-03 14:53:56,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 181. [2021-05-03 14:53:56,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.933333333333333) internal successors, (528), 180 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:56,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 528 transitions. [2021-05-03 14:53:56,016 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 528 transitions. Word has length 17 [2021-05-03 14:53:56,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:56,016 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 528 transitions. [2021-05-03 14:53:56,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:56,017 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 528 transitions. [2021-05-03 14:53:56,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:53:56,017 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:56,017 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:56,017 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-05-03 14:53:56,017 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:56,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:56,017 INFO L82 PathProgramCache]: Analyzing trace with hash 2049664750, now seen corresponding path program 34 times [2021-05-03 14:53:56,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:56,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085431326] [2021-05-03 14:53:56,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:56,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:56,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:56,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085431326] [2021-05-03 14:53:56,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:56,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:53:56,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150889409] [2021-05-03 14:53:56,072 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:53:56,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:56,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:53:56,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:53:56,072 INFO L87 Difference]: Start difference. First operand 181 states and 528 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:56,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:56,168 INFO L93 Difference]: Finished difference Result 438 states and 1184 transitions. [2021-05-03 14:53:56,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:53:56,168 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:53:56,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:56,170 INFO L225 Difference]: With dead ends: 438 [2021-05-03 14:53:56,170 INFO L226 Difference]: Without dead ends: 423 [2021-05-03 14:53:56,170 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 74.4ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:53:56,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-05-03 14:53:56,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 185. [2021-05-03 14:53:56,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.9456521739130435) internal successors, (542), 184 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:56,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 542 transitions. [2021-05-03 14:53:56,175 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 542 transitions. Word has length 17 [2021-05-03 14:53:56,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:56,175 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 542 transitions. [2021-05-03 14:53:56,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:56,175 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 542 transitions. [2021-05-03 14:53:56,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:53:56,176 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:56,176 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:56,176 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-05-03 14:53:56,176 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:56,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:56,176 INFO L82 PathProgramCache]: Analyzing trace with hash 278392308, now seen corresponding path program 35 times [2021-05-03 14:53:56,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:56,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721133281] [2021-05-03 14:53:56,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:56,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:56,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:56,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721133281] [2021-05-03 14:53:56,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:56,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:53:56,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056024799] [2021-05-03 14:53:56,222 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:53:56,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:56,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:53:56,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:53:56,222 INFO L87 Difference]: Start difference. First operand 185 states and 542 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:56,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:56,350 INFO L93 Difference]: Finished difference Result 433 states and 1175 transitions. [2021-05-03 14:53:56,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:53:56,350 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:53:56,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:56,352 INFO L225 Difference]: With dead ends: 433 [2021-05-03 14:53:56,352 INFO L226 Difference]: Without dead ends: 418 [2021-05-03 14:53:56,352 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 102.4ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:53:56,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-05-03 14:53:56,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 187. [2021-05-03 14:53:56,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.9623655913978495) internal successors, (551), 186 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:56,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 551 transitions. [2021-05-03 14:53:56,356 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 551 transitions. Word has length 17 [2021-05-03 14:53:56,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:56,356 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 551 transitions. [2021-05-03 14:53:56,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:56,356 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 551 transitions. [2021-05-03 14:53:56,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:53:56,356 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:56,357 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:56,357 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-05-03 14:53:56,357 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:56,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:56,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1347392328, now seen corresponding path program 36 times [2021-05-03 14:53:56,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:56,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261569305] [2021-05-03 14:53:56,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:56,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:56,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:56,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261569305] [2021-05-03 14:53:56,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:56,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:53:56,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192553988] [2021-05-03 14:53:56,404 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:53:56,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:56,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:53:56,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:53:56,404 INFO L87 Difference]: Start difference. First operand 187 states and 551 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:56,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:56,561 INFO L93 Difference]: Finished difference Result 416 states and 1145 transitions. [2021-05-03 14:53:56,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:53:56,561 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:53:56,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:56,562 INFO L225 Difference]: With dead ends: 416 [2021-05-03 14:53:56,563 INFO L226 Difference]: Without dead ends: 401 [2021-05-03 14:53:56,563 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 102.6ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:53:56,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-05-03 14:53:56,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 181. [2021-05-03 14:53:56,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.933333333333333) internal successors, (528), 180 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:56,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 528 transitions. [2021-05-03 14:53:56,566 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 528 transitions. Word has length 17 [2021-05-03 14:53:56,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:56,566 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 528 transitions. [2021-05-03 14:53:56,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:56,566 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 528 transitions. [2021-05-03 14:53:56,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:53:56,567 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:56,567 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:56,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-05-03 14:53:56,567 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:56,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:56,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1040697164, now seen corresponding path program 37 times [2021-05-03 14:53:56,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:56,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486041141] [2021-05-03 14:53:56,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:56,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:56,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:56,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486041141] [2021-05-03 14:53:56,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:56,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:53:56,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642666255] [2021-05-03 14:53:56,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:53:56,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:56,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:53:56,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:53:56,612 INFO L87 Difference]: Start difference. First operand 181 states and 528 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:56,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:56,737 INFO L93 Difference]: Finished difference Result 437 states and 1201 transitions. [2021-05-03 14:53:56,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:53:56,738 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:53:56,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:56,739 INFO L225 Difference]: With dead ends: 437 [2021-05-03 14:53:56,739 INFO L226 Difference]: Without dead ends: 422 [2021-05-03 14:53:56,740 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 102.1ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:53:56,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-05-03 14:53:56,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 184. [2021-05-03 14:53:56,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.9672131147540983) internal successors, (543), 183 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:56,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 543 transitions. [2021-05-03 14:53:56,746 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 543 transitions. Word has length 17 [2021-05-03 14:53:56,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:56,746 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 543 transitions. [2021-05-03 14:53:56,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:56,747 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 543 transitions. [2021-05-03 14:53:56,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:53:56,747 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:56,747 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:56,747 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-05-03 14:53:56,747 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:56,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:56,747 INFO L82 PathProgramCache]: Analyzing trace with hash 2035634772, now seen corresponding path program 38 times [2021-05-03 14:53:56,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:56,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640926925] [2021-05-03 14:53:56,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:56,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:56,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:56,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640926925] [2021-05-03 14:53:56,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:56,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:53:56,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954692080] [2021-05-03 14:53:56,809 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:53:56,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:56,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:53:56,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:53:56,810 INFO L87 Difference]: Start difference. First operand 184 states and 543 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:56,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:56,952 INFO L93 Difference]: Finished difference Result 435 states and 1194 transitions. [2021-05-03 14:53:56,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:53:56,952 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:53:56,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:56,954 INFO L225 Difference]: With dead ends: 435 [2021-05-03 14:53:56,954 INFO L226 Difference]: Without dead ends: 420 [2021-05-03 14:53:56,954 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 106.2ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:53:56,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-05-03 14:53:56,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 182. [2021-05-03 14:53:56,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.9502762430939224) internal successors, (534), 181 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:56,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 534 transitions. [2021-05-03 14:53:56,958 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 534 transitions. Word has length 17 [2021-05-03 14:53:56,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:56,958 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 534 transitions. [2021-05-03 14:53:56,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:56,958 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 534 transitions. [2021-05-03 14:53:56,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:53:56,959 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:56,959 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:56,959 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-05-03 14:53:56,959 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:56,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:56,959 INFO L82 PathProgramCache]: Analyzing trace with hash -51636616, now seen corresponding path program 39 times [2021-05-03 14:53:56,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:56,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165711612] [2021-05-03 14:53:56,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:56,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:57,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:57,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165711612] [2021-05-03 14:53:57,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:57,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:53:57,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680183812] [2021-05-03 14:53:57,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:53:57,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:57,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:53:57,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:53:57,035 INFO L87 Difference]: Start difference. First operand 182 states and 534 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:57,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:57,186 INFO L93 Difference]: Finished difference Result 468 states and 1258 transitions. [2021-05-03 14:53:57,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:53:57,186 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:53:57,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:57,188 INFO L225 Difference]: With dead ends: 468 [2021-05-03 14:53:57,188 INFO L226 Difference]: Without dead ends: 453 [2021-05-03 14:53:57,188 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 122.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:53:57,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-05-03 14:53:57,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 185. [2021-05-03 14:53:57,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.9782608695652173) internal successors, (548), 184 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:57,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 548 transitions. [2021-05-03 14:53:57,199 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 548 transitions. Word has length 17 [2021-05-03 14:53:57,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:57,199 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 548 transitions. [2021-05-03 14:53:57,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:57,200 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 548 transitions. [2021-05-03 14:53:57,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:53:57,200 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:57,200 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:57,200 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-05-03 14:53:57,200 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:57,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:57,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1221825612, now seen corresponding path program 40 times [2021-05-03 14:53:57,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:57,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524512592] [2021-05-03 14:53:57,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:57,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:57,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:57,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524512592] [2021-05-03 14:53:57,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:57,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:53:57,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003869923] [2021-05-03 14:53:57,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:53:57,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:57,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:53:57,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:53:57,244 INFO L87 Difference]: Start difference. First operand 185 states and 548 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:57,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:57,399 INFO L93 Difference]: Finished difference Result 452 states and 1235 transitions. [2021-05-03 14:53:57,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:53:57,400 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:53:57,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:57,401 INFO L225 Difference]: With dead ends: 452 [2021-05-03 14:53:57,401 INFO L226 Difference]: Without dead ends: 437 [2021-05-03 14:53:57,401 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 123.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:53:57,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-05-03 14:53:57,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 182. [2021-05-03 14:53:57,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.9502762430939224) internal successors, (534), 181 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:57,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 534 transitions. [2021-05-03 14:53:57,405 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 534 transitions. Word has length 17 [2021-05-03 14:53:57,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:57,405 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 534 transitions. [2021-05-03 14:53:57,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:57,405 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 534 transitions. [2021-05-03 14:53:57,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:53:57,406 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:57,406 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:57,406 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-05-03 14:53:57,406 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:57,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:57,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1238762664, now seen corresponding path program 41 times [2021-05-03 14:53:57,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:57,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229632881] [2021-05-03 14:53:57,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:57,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:57,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:57,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229632881] [2021-05-03 14:53:57,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:57,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:53:57,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990600422] [2021-05-03 14:53:57,457 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:53:57,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:57,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:53:57,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:53:57,458 INFO L87 Difference]: Start difference. First operand 182 states and 534 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:57,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:57,607 INFO L93 Difference]: Finished difference Result 446 states and 1215 transitions. [2021-05-03 14:53:57,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:53:57,608 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:53:57,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:57,609 INFO L225 Difference]: With dead ends: 446 [2021-05-03 14:53:57,609 INFO L226 Difference]: Without dead ends: 431 [2021-05-03 14:53:57,609 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 100.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:53:57,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-05-03 14:53:57,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 184. [2021-05-03 14:53:57,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.9672131147540983) internal successors, (543), 183 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:57,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 543 transitions. [2021-05-03 14:53:57,614 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 543 transitions. Word has length 17 [2021-05-03 14:53:57,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:57,614 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 543 transitions. [2021-05-03 14:53:57,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:57,614 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 543 transitions. [2021-05-03 14:53:57,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:53:57,615 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:57,615 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:57,615 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-05-03 14:53:57,615 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:57,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:57,615 INFO L82 PathProgramCache]: Analyzing trace with hash -98478828, now seen corresponding path program 42 times [2021-05-03 14:53:57,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:57,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098736797] [2021-05-03 14:53:57,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:57,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:57,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:57,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098736797] [2021-05-03 14:53:57,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:57,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:53:57,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413413842] [2021-05-03 14:53:57,664 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:53:57,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:57,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:53:57,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:53:57,665 INFO L87 Difference]: Start difference. First operand 184 states and 543 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:57,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:57,805 INFO L93 Difference]: Finished difference Result 425 states and 1177 transitions. [2021-05-03 14:53:57,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:53:57,805 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:53:57,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:57,806 INFO L225 Difference]: With dead ends: 425 [2021-05-03 14:53:57,806 INFO L226 Difference]: Without dead ends: 410 [2021-05-03 14:53:57,806 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 105.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:53:57,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-05-03 14:53:57,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 179. [2021-05-03 14:53:57,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.9101123595505616) internal successors, (518), 178 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:57,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 518 transitions. [2021-05-03 14:53:57,810 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 518 transitions. Word has length 17 [2021-05-03 14:53:57,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:57,810 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 518 transitions. [2021-05-03 14:53:57,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:57,810 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 518 transitions. [2021-05-03 14:53:57,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:53:57,810 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:57,810 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:57,811 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-05-03 14:53:57,811 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:57,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:57,811 INFO L82 PathProgramCache]: Analyzing trace with hash -485249606, now seen corresponding path program 43 times [2021-05-03 14:53:57,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:57,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640728213] [2021-05-03 14:53:57,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:57,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:57,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:57,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640728213] [2021-05-03 14:53:57,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:57,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:53:57,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967496491] [2021-05-03 14:53:57,880 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:53:57,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:57,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:53:57,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:53:57,880 INFO L87 Difference]: Start difference. First operand 179 states and 518 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:57,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:57,987 INFO L93 Difference]: Finished difference Result 323 states and 889 transitions. [2021-05-03 14:53:57,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:53:57,991 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:53:57,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:57,991 INFO L225 Difference]: With dead ends: 323 [2021-05-03 14:53:57,991 INFO L226 Difference]: Without dead ends: 308 [2021-05-03 14:53:57,991 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 92.9ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:53:57,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-05-03 14:53:57,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 187. [2021-05-03 14:53:57,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.913978494623656) internal successors, (542), 186 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:57,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 542 transitions. [2021-05-03 14:53:57,995 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 542 transitions. Word has length 17 [2021-05-03 14:53:57,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:57,995 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 542 transitions. [2021-05-03 14:53:57,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:57,995 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 542 transitions. [2021-05-03 14:53:57,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:53:57,995 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:57,995 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:57,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-05-03 14:53:57,995 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:57,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:57,996 INFO L82 PathProgramCache]: Analyzing trace with hash 2038445248, now seen corresponding path program 44 times [2021-05-03 14:53:57,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:57,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167943960] [2021-05-03 14:53:57,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:57,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:58,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:58,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167943960] [2021-05-03 14:53:58,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:58,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:53:58,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82375622] [2021-05-03 14:53:58,057 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:53:58,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:58,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:53:58,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:53:58,057 INFO L87 Difference]: Start difference. First operand 187 states and 542 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:58,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:58,185 INFO L93 Difference]: Finished difference Result 353 states and 951 transitions. [2021-05-03 14:53:58,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:53:58,186 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:53:58,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:58,186 INFO L225 Difference]: With dead ends: 353 [2021-05-03 14:53:58,186 INFO L226 Difference]: Without dead ends: 338 [2021-05-03 14:53:58,186 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 113.9ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:53:58,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-05-03 14:53:58,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 189. [2021-05-03 14:53:58,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9308510638297873) internal successors, (551), 188 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:58,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 551 transitions. [2021-05-03 14:53:58,190 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 551 transitions. Word has length 17 [2021-05-03 14:53:58,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:58,190 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 551 transitions. [2021-05-03 14:53:58,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:58,190 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 551 transitions. [2021-05-03 14:53:58,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:53:58,190 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:58,190 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:58,190 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-05-03 14:53:58,190 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:58,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:58,191 INFO L82 PathProgramCache]: Analyzing trace with hash 412660612, now seen corresponding path program 45 times [2021-05-03 14:53:58,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:58,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995488896] [2021-05-03 14:53:58,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:58,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:58,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:58,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995488896] [2021-05-03 14:53:58,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:58,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:53:58,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248700551] [2021-05-03 14:53:58,245 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:53:58,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:58,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:53:58,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:53:58,245 INFO L87 Difference]: Start difference. First operand 189 states and 551 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:58,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:58,374 INFO L93 Difference]: Finished difference Result 336 states and 921 transitions. [2021-05-03 14:53:58,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:53:58,375 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:53:58,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:58,376 INFO L225 Difference]: With dead ends: 336 [2021-05-03 14:53:58,376 INFO L226 Difference]: Without dead ends: 321 [2021-05-03 14:53:58,376 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 106.2ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:53:58,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-05-03 14:53:58,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 183. [2021-05-03 14:53:58,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.901098901098901) internal successors, (528), 182 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:58,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 528 transitions. [2021-05-03 14:53:58,379 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 528 transitions. Word has length 17 [2021-05-03 14:53:58,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:58,379 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 528 transitions. [2021-05-03 14:53:58,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:58,379 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 528 transitions. [2021-05-03 14:53:58,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:53:58,380 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:58,380 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:58,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-05-03 14:53:58,380 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:58,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:58,380 INFO L82 PathProgramCache]: Analyzing trace with hash 379489126, now seen corresponding path program 46 times [2021-05-03 14:53:58,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:58,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223710800] [2021-05-03 14:53:58,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:58,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:58,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:58,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223710800] [2021-05-03 14:53:58,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:58,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:53:58,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131891492] [2021-05-03 14:53:58,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:53:58,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:58,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:53:58,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:53:58,442 INFO L87 Difference]: Start difference. First operand 183 states and 528 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:58,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:58,550 INFO L93 Difference]: Finished difference Result 324 states and 889 transitions. [2021-05-03 14:53:58,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:53:58,551 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:53:58,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:58,551 INFO L225 Difference]: With dead ends: 324 [2021-05-03 14:53:58,551 INFO L226 Difference]: Without dead ends: 309 [2021-05-03 14:53:58,552 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 103.3ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:53:58,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-05-03 14:53:58,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 189. [2021-05-03 14:53:58,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.8882978723404253) internal successors, (543), 188 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:58,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 543 transitions. [2021-05-03 14:53:58,555 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 543 transitions. Word has length 17 [2021-05-03 14:53:58,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:58,555 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 543 transitions. [2021-05-03 14:53:58,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:58,555 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 543 transitions. [2021-05-03 14:53:58,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:53:58,555 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:58,555 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:58,555 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-05-03 14:53:58,555 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:58,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:58,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1252190110, now seen corresponding path program 47 times [2021-05-03 14:53:58,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:58,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109121308] [2021-05-03 14:53:58,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:58,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:58,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:58,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109121308] [2021-05-03 14:53:58,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:58,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:53:58,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625687040] [2021-05-03 14:53:58,604 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:53:58,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:58,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:53:58,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:53:58,604 INFO L87 Difference]: Start difference. First operand 189 states and 543 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:58,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:58,740 INFO L93 Difference]: Finished difference Result 354 states and 954 transitions. [2021-05-03 14:53:58,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:53:58,740 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:53:58,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:58,741 INFO L225 Difference]: With dead ends: 354 [2021-05-03 14:53:58,741 INFO L226 Difference]: Without dead ends: 339 [2021-05-03 14:53:58,741 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 114.0ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:53:58,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-05-03 14:53:58,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 191. [2021-05-03 14:53:58,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.905263157894737) internal successors, (552), 190 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:58,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 552 transitions. [2021-05-03 14:53:58,744 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 552 transitions. Word has length 17 [2021-05-03 14:53:58,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:58,745 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 552 transitions. [2021-05-03 14:53:58,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:58,745 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 552 transitions. [2021-05-03 14:53:58,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:53:58,745 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:58,745 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:58,745 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-05-03 14:53:58,745 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:58,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:58,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1416992550, now seen corresponding path program 48 times [2021-05-03 14:53:58,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:58,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259737934] [2021-05-03 14:53:58,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:58,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:58,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:58,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259737934] [2021-05-03 14:53:58,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:58,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:53:58,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172375935] [2021-05-03 14:53:58,802 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:53:58,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:58,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:53:58,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:53:58,803 INFO L87 Difference]: Start difference. First operand 191 states and 552 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:58,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:58,936 INFO L93 Difference]: Finished difference Result 333 states and 916 transitions. [2021-05-03 14:53:58,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:53:58,937 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:53:58,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:58,937 INFO L225 Difference]: With dead ends: 333 [2021-05-03 14:53:58,937 INFO L226 Difference]: Without dead ends: 318 [2021-05-03 14:53:58,938 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 110.8ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:53:58,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-05-03 14:53:58,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 189. [2021-05-03 14:53:58,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.8882978723404253) internal successors, (543), 188 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:58,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 543 transitions. [2021-05-03 14:53:58,941 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 543 transitions. Word has length 17 [2021-05-03 14:53:58,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:58,941 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 543 transitions. [2021-05-03 14:53:58,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:58,941 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 543 transitions. [2021-05-03 14:53:58,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:53:58,941 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:58,941 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:58,941 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-05-03 14:53:58,942 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:58,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:58,942 INFO L82 PathProgramCache]: Analyzing trace with hash -167418646, now seen corresponding path program 49 times [2021-05-03 14:53:58,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:58,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461955750] [2021-05-03 14:53:58,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:58,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:58,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:58,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461955750] [2021-05-03 14:53:58,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:58,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:53:58,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425679551] [2021-05-03 14:53:58,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:53:58,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:58,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:53:58,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:53:58,986 INFO L87 Difference]: Start difference. First operand 189 states and 543 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:59,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:59,105 INFO L93 Difference]: Finished difference Result 386 states and 1068 transitions. [2021-05-03 14:53:59,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:53:59,106 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:53:59,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:59,106 INFO L225 Difference]: With dead ends: 386 [2021-05-03 14:53:59,106 INFO L226 Difference]: Without dead ends: 371 [2021-05-03 14:53:59,106 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 99.2ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:53:59,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-05-03 14:53:59,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 194. [2021-05-03 14:53:59,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.922279792746114) internal successors, (564), 193 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:59,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 564 transitions. [2021-05-03 14:53:59,110 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 564 transitions. Word has length 17 [2021-05-03 14:53:59,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:59,110 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 564 transitions. [2021-05-03 14:53:59,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:59,110 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 564 transitions. [2021-05-03 14:53:59,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:53:59,111 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:59,111 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:59,111 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-05-03 14:53:59,111 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:59,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:59,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1386054006, now seen corresponding path program 50 times [2021-05-03 14:53:59,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:59,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718120620] [2021-05-03 14:53:59,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:59,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:59,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:59,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718120620] [2021-05-03 14:53:59,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:59,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:53:59,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893043790] [2021-05-03 14:53:59,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:53:59,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:59,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:53:59,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:53:59,169 INFO L87 Difference]: Start difference. First operand 194 states and 564 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:59,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:59,298 INFO L93 Difference]: Finished difference Result 390 states and 1074 transitions. [2021-05-03 14:53:59,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:53:59,299 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:53:59,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:59,300 INFO L225 Difference]: With dead ends: 390 [2021-05-03 14:53:59,300 INFO L226 Difference]: Without dead ends: 375 [2021-05-03 14:53:59,300 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 106.8ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:53:59,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-05-03 14:53:59,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 192. [2021-05-03 14:53:59,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.905759162303665) internal successors, (555), 191 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:59,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 555 transitions. [2021-05-03 14:53:59,303 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 555 transitions. Word has length 17 [2021-05-03 14:53:59,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:59,304 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 555 transitions. [2021-05-03 14:53:59,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:59,304 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 555 transitions. [2021-05-03 14:53:59,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:53:59,304 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:59,304 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:59,304 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-05-03 14:53:59,304 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:59,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:59,305 INFO L82 PathProgramCache]: Analyzing trace with hash -310342850, now seen corresponding path program 51 times [2021-05-03 14:53:59,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:59,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102544352] [2021-05-03 14:53:59,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:59,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:59,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:59,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102544352] [2021-05-03 14:53:59,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:59,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:53:59,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296880807] [2021-05-03 14:53:59,363 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:53:59,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:59,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:53:59,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:53:59,363 INFO L87 Difference]: Start difference. First operand 192 states and 555 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:59,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:59,477 INFO L93 Difference]: Finished difference Result 386 states and 1060 transitions. [2021-05-03 14:53:59,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:53:59,477 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:53:59,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:59,478 INFO L225 Difference]: With dead ends: 386 [2021-05-03 14:53:59,478 INFO L226 Difference]: Without dead ends: 371 [2021-05-03 14:53:59,478 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 89.3ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:53:59,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-05-03 14:53:59,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 192. [2021-05-03 14:53:59,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.905759162303665) internal successors, (555), 191 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:59,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 555 transitions. [2021-05-03 14:53:59,481 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 555 transitions. Word has length 17 [2021-05-03 14:53:59,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:59,482 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 555 transitions. [2021-05-03 14:53:59,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:59,482 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 555 transitions. [2021-05-03 14:53:59,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:53:59,482 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:59,482 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:59,482 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-05-03 14:53:59,482 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:59,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:59,482 INFO L82 PathProgramCache]: Analyzing trace with hash -548101402, now seen corresponding path program 52 times [2021-05-03 14:53:59,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:59,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127018525] [2021-05-03 14:53:59,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:59,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:59,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:59,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127018525] [2021-05-03 14:53:59,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:59,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:53:59,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680866584] [2021-05-03 14:53:59,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:53:59,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:59,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:53:59,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:53:59,531 INFO L87 Difference]: Start difference. First operand 192 states and 555 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:59,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:59,691 INFO L93 Difference]: Finished difference Result 464 states and 1256 transitions. [2021-05-03 14:53:59,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:53:59,692 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:53:59,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:59,693 INFO L225 Difference]: With dead ends: 464 [2021-05-03 14:53:59,693 INFO L226 Difference]: Without dead ends: 449 [2021-05-03 14:53:59,693 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 105.9ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:53:59,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-05-03 14:53:59,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 195. [2021-05-03 14:53:59,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.9381443298969074) internal successors, (570), 194 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:59,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 570 transitions. [2021-05-03 14:53:59,697 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 570 transitions. Word has length 17 [2021-05-03 14:53:59,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:59,697 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 570 transitions. [2021-05-03 14:53:59,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:59,697 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 570 transitions. [2021-05-03 14:53:59,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:53:59,697 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:59,697 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:59,697 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-05-03 14:53:59,697 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:59,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:59,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1766736762, now seen corresponding path program 53 times [2021-05-03 14:53:59,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:59,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219794185] [2021-05-03 14:53:59,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:59,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:59,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:59,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219794185] [2021-05-03 14:53:59,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:59,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:53:59,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319787895] [2021-05-03 14:53:59,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:53:59,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:59,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:53:59,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:53:59,745 INFO L87 Difference]: Start difference. First operand 195 states and 570 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:59,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:53:59,889 INFO L93 Difference]: Finished difference Result 468 states and 1262 transitions. [2021-05-03 14:53:59,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:53:59,889 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:53:59,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:53:59,890 INFO L225 Difference]: With dead ends: 468 [2021-05-03 14:53:59,890 INFO L226 Difference]: Without dead ends: 453 [2021-05-03 14:53:59,890 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 110.9ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:53:59,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-05-03 14:53:59,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 193. [2021-05-03 14:53:59,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.921875) internal successors, (561), 192 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:53:59,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 561 transitions. [2021-05-03 14:53:59,894 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 561 transitions. Word has length 17 [2021-05-03 14:53:59,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:53:59,894 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 561 transitions. [2021-05-03 14:53:59,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:53:59,894 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 561 transitions. [2021-05-03 14:53:59,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:53:59,895 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:53:59,895 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:53:59,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-05-03 14:53:59,895 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:53:59,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:53:59,895 INFO L82 PathProgramCache]: Analyzing trace with hash 440959146, now seen corresponding path program 54 times [2021-05-03 14:53:59,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:53:59,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244298282] [2021-05-03 14:53:59,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:53:59,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:53:59,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:53:59,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244298282] [2021-05-03 14:53:59,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:53:59,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:53:59,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284170577] [2021-05-03 14:53:59,947 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:53:59,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:53:59,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:53:59,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:53:59,948 INFO L87 Difference]: Start difference. First operand 193 states and 561 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:00,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:00,121 INFO L93 Difference]: Finished difference Result 431 states and 1182 transitions. [2021-05-03 14:54:00,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:00,124 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:54:00,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:00,125 INFO L225 Difference]: With dead ends: 431 [2021-05-03 14:54:00,125 INFO L226 Difference]: Without dead ends: 416 [2021-05-03 14:54:00,125 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 141.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:54:00,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-05-03 14:54:00,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 196. [2021-05-03 14:54:00,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.948717948717949) internal successors, (575), 195 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:00,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 575 transitions. [2021-05-03 14:54:00,129 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 575 transitions. Word has length 17 [2021-05-03 14:54:00,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:00,129 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 575 transitions. [2021-05-03 14:54:00,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:00,129 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 575 transitions. [2021-05-03 14:54:00,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:54:00,130 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:00,130 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:00,130 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-05-03 14:54:00,130 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:00,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:00,130 INFO L82 PathProgramCache]: Analyzing trace with hash -729229850, now seen corresponding path program 55 times [2021-05-03 14:54:00,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:00,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045490086] [2021-05-03 14:54:00,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:00,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:00,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:00,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045490086] [2021-05-03 14:54:00,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:54:00,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:54:00,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840558335] [2021-05-03 14:54:00,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:54:00,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:00,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:54:00,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:54:00,187 INFO L87 Difference]: Start difference. First operand 196 states and 575 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:00,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:00,347 INFO L93 Difference]: Finished difference Result 415 states and 1159 transitions. [2021-05-03 14:54:00,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:00,347 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:54:00,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:00,348 INFO L225 Difference]: With dead ends: 415 [2021-05-03 14:54:00,348 INFO L226 Difference]: Without dead ends: 400 [2021-05-03 14:54:00,348 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 132.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:54:00,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-05-03 14:54:00,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 193. [2021-05-03 14:54:00,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.921875) internal successors, (561), 192 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:00,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 561 transitions. [2021-05-03 14:54:00,352 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 561 transitions. Word has length 17 [2021-05-03 14:54:00,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:00,352 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 561 transitions. [2021-05-03 14:54:00,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:00,352 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 561 transitions. [2021-05-03 14:54:00,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:54:00,352 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:00,353 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:00,353 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-05-03 14:54:00,353 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:00,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:00,353 INFO L82 PathProgramCache]: Analyzing trace with hash -746166902, now seen corresponding path program 56 times [2021-05-03 14:54:00,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:00,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713389721] [2021-05-03 14:54:00,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:00,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:00,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:00,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713389721] [2021-05-03 14:54:00,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:54:00,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:54:00,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957696273] [2021-05-03 14:54:00,410 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:54:00,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:00,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:54:00,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:54:00,411 INFO L87 Difference]: Start difference. First operand 193 states and 561 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:00,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:00,542 INFO L93 Difference]: Finished difference Result 449 states and 1229 transitions. [2021-05-03 14:54:00,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:00,542 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:54:00,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:00,543 INFO L225 Difference]: With dead ends: 449 [2021-05-03 14:54:00,543 INFO L226 Difference]: Without dead ends: 434 [2021-05-03 14:54:00,543 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 110.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:54:00,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-05-03 14:54:00,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 195. [2021-05-03 14:54:00,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.9381443298969074) internal successors, (570), 194 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:00,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 570 transitions. [2021-05-03 14:54:00,547 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 570 transitions. Word has length 17 [2021-05-03 14:54:00,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:00,547 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 570 transitions. [2021-05-03 14:54:00,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:00,547 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 570 transitions. [2021-05-03 14:54:00,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:54:00,547 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:00,547 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:00,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-05-03 14:54:00,548 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:00,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:00,548 INFO L82 PathProgramCache]: Analyzing trace with hash 394116934, now seen corresponding path program 57 times [2021-05-03 14:54:00,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:00,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114977972] [2021-05-03 14:54:00,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:00,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:00,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:00,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114977972] [2021-05-03 14:54:00,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:54:00,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:54:00,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862526983] [2021-05-03 14:54:00,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:54:00,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:00,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:54:00,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:54:00,599 INFO L87 Difference]: Start difference. First operand 195 states and 570 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:00,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:00,738 INFO L93 Difference]: Finished difference Result 428 states and 1191 transitions. [2021-05-03 14:54:00,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:00,739 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:54:00,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:00,740 INFO L225 Difference]: With dead ends: 428 [2021-05-03 14:54:00,740 INFO L226 Difference]: Without dead ends: 413 [2021-05-03 14:54:00,740 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 91.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:54:00,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-05-03 14:54:00,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 192. [2021-05-03 14:54:00,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.905759162303665) internal successors, (555), 191 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:00,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 555 transitions. [2021-05-03 14:54:00,743 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 555 transitions. Word has length 17 [2021-05-03 14:54:00,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:00,743 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 555 transitions. [2021-05-03 14:54:00,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:00,743 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 555 transitions. [2021-05-03 14:54:00,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:54:00,744 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:00,744 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:00,744 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-05-03 14:54:00,744 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:00,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:00,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1262551738, now seen corresponding path program 58 times [2021-05-03 14:54:00,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:00,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170266184] [2021-05-03 14:54:00,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:00,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:00,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:00,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170266184] [2021-05-03 14:54:00,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:54:00,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:54:00,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771425479] [2021-05-03 14:54:00,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:54:00,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:00,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:54:00,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:54:00,801 INFO L87 Difference]: Start difference. First operand 192 states and 555 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:00,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:00,915 INFO L93 Difference]: Finished difference Result 429 states and 1161 transitions. [2021-05-03 14:54:00,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:00,915 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:54:00,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:00,916 INFO L225 Difference]: With dead ends: 429 [2021-05-03 14:54:00,916 INFO L226 Difference]: Without dead ends: 414 [2021-05-03 14:54:00,916 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 91.6ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:54:00,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-05-03 14:54:00,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 194. [2021-05-03 14:54:00,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.911917098445596) internal successors, (562), 193 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:00,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 562 transitions. [2021-05-03 14:54:00,920 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 562 transitions. Word has length 17 [2021-05-03 14:54:00,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:00,920 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 562 transitions. [2021-05-03 14:54:00,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:00,920 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 562 transitions. [2021-05-03 14:54:00,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:54:00,920 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:00,920 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:00,920 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-05-03 14:54:00,920 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:00,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:00,921 INFO L82 PathProgramCache]: Analyzing trace with hash -2074864322, now seen corresponding path program 59 times [2021-05-03 14:54:00,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:00,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449184894] [2021-05-03 14:54:00,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:00,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:00,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:00,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449184894] [2021-05-03 14:54:00,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:54:00,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:54:00,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259013527] [2021-05-03 14:54:00,977 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:54:00,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:00,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:54:00,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:54:00,977 INFO L87 Difference]: Start difference. First operand 194 states and 562 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:01,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:01,108 INFO L93 Difference]: Finished difference Result 430 states and 1172 transitions. [2021-05-03 14:54:01,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:01,108 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:54:01,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:01,109 INFO L225 Difference]: With dead ends: 430 [2021-05-03 14:54:01,109 INFO L226 Difference]: Without dead ends: 415 [2021-05-03 14:54:01,109 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 112.5ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:54:01,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-05-03 14:54:01,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 196. [2021-05-03 14:54:01,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.928205128205128) internal successors, (571), 195 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:01,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 571 transitions. [2021-05-03 14:54:01,113 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 571 transitions. Word has length 17 [2021-05-03 14:54:01,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:01,113 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 571 transitions. [2021-05-03 14:54:01,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:01,113 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 571 transitions. [2021-05-03 14:54:01,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:54:01,114 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:01,114 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:01,114 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-05-03 14:54:01,114 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:01,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:01,114 INFO L82 PathProgramCache]: Analyzing trace with hash -934580486, now seen corresponding path program 60 times [2021-05-03 14:54:01,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:01,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016195888] [2021-05-03 14:54:01,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:01,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:01,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:01,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016195888] [2021-05-03 14:54:01,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:54:01,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:54:01,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859275430] [2021-05-03 14:54:01,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:54:01,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:01,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:54:01,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:54:01,167 INFO L87 Difference]: Start difference. First operand 196 states and 571 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:01,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:01,293 INFO L93 Difference]: Finished difference Result 409 states and 1134 transitions. [2021-05-03 14:54:01,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:01,293 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:54:01,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:01,294 INFO L225 Difference]: With dead ends: 409 [2021-05-03 14:54:01,294 INFO L226 Difference]: Without dead ends: 394 [2021-05-03 14:54:01,294 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 99.1ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:54:01,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-05-03 14:54:01,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 192. [2021-05-03 14:54:01,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.905759162303665) internal successors, (555), 191 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:01,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 555 transitions. [2021-05-03 14:54:01,298 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 555 transitions. Word has length 17 [2021-05-03 14:54:01,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:01,298 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 555 transitions. [2021-05-03 14:54:01,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:01,298 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 555 transitions. [2021-05-03 14:54:01,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:54:01,298 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:01,298 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:01,298 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-05-03 14:54:01,298 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:01,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:01,299 INFO L82 PathProgramCache]: Analyzing trace with hash -674451760, now seen corresponding path program 61 times [2021-05-03 14:54:01,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:01,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895001804] [2021-05-03 14:54:01,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:01,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:01,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:01,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895001804] [2021-05-03 14:54:01,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:54:01,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:54:01,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410679156] [2021-05-03 14:54:01,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:54:01,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:01,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:54:01,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:54:01,344 INFO L87 Difference]: Start difference. First operand 192 states and 555 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:01,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:01,451 INFO L93 Difference]: Finished difference Result 328 states and 903 transitions. [2021-05-03 14:54:01,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:01,451 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:54:01,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:01,452 INFO L225 Difference]: With dead ends: 328 [2021-05-03 14:54:01,452 INFO L226 Difference]: Without dead ends: 313 [2021-05-03 14:54:01,452 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 87.7ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:54:01,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-05-03 14:54:01,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 197. [2021-05-03 14:54:01,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.913265306122449) internal successors, (571), 196 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:01,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 571 transitions. [2021-05-03 14:54:01,455 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 571 transitions. Word has length 17 [2021-05-03 14:54:01,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:01,455 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 571 transitions. [2021-05-03 14:54:01,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:01,455 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 571 transitions. [2021-05-03 14:54:01,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:54:01,456 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:01,456 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:01,456 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-05-03 14:54:01,456 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:01,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:01,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1924375180, now seen corresponding path program 62 times [2021-05-03 14:54:01,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:01,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230256619] [2021-05-03 14:54:01,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:01,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:01,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:01,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230256619] [2021-05-03 14:54:01,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:54:01,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:54:01,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318142284] [2021-05-03 14:54:01,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:54:01,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:01,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:54:01,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:54:01,511 INFO L87 Difference]: Start difference. First operand 197 states and 571 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:01,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:01,653 INFO L93 Difference]: Finished difference Result 357 states and 963 transitions. [2021-05-03 14:54:01,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:01,653 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:54:01,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:01,654 INFO L225 Difference]: With dead ends: 357 [2021-05-03 14:54:01,654 INFO L226 Difference]: Without dead ends: 342 [2021-05-03 14:54:01,654 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 118.2ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:54:01,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-05-03 14:54:01,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 199. [2021-05-03 14:54:01,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.9292929292929295) internal successors, (580), 198 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:01,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 580 transitions. [2021-05-03 14:54:01,658 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 580 transitions. Word has length 17 [2021-05-03 14:54:01,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:01,658 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 580 transitions. [2021-05-03 14:54:01,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:01,658 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 580 transitions. [2021-05-03 14:54:01,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:54:01,658 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:01,658 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:01,658 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-05-03 14:54:01,658 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:01,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:01,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1151956756, now seen corresponding path program 63 times [2021-05-03 14:54:01,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:01,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610387129] [2021-05-03 14:54:01,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:01,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:01,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:01,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610387129] [2021-05-03 14:54:01,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:54:01,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:54:01,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848804096] [2021-05-03 14:54:01,708 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:54:01,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:01,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:54:01,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:54:01,709 INFO L87 Difference]: Start difference. First operand 199 states and 580 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:01,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:01,854 INFO L93 Difference]: Finished difference Result 334 states and 918 transitions. [2021-05-03 14:54:01,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:01,854 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:54:01,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:01,855 INFO L225 Difference]: With dead ends: 334 [2021-05-03 14:54:01,855 INFO L226 Difference]: Without dead ends: 319 [2021-05-03 14:54:01,855 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 109.6ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:54:01,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-05-03 14:54:01,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 195. [2021-05-03 14:54:01,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.9072164948453607) internal successors, (564), 194 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:01,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 564 transitions. [2021-05-03 14:54:01,858 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 564 transitions. Word has length 17 [2021-05-03 14:54:01,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:01,859 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 564 transitions. [2021-05-03 14:54:01,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:01,859 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 564 transitions. [2021-05-03 14:54:01,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:54:01,859 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:01,859 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:01,859 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-05-03 14:54:01,859 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:01,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:01,859 INFO L82 PathProgramCache]: Analyzing trace with hash 263807996, now seen corresponding path program 64 times [2021-05-03 14:54:01,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:01,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624098551] [2021-05-03 14:54:01,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:01,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:01,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:01,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624098551] [2021-05-03 14:54:01,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:54:01,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:54:01,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944397225] [2021-05-03 14:54:01,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:54:01,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:01,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:54:01,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:54:01,906 INFO L87 Difference]: Start difference. First operand 195 states and 564 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:02,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:02,055 INFO L93 Difference]: Finished difference Result 349 states and 945 transitions. [2021-05-03 14:54:02,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:02,056 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:54:02,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:02,056 INFO L225 Difference]: With dead ends: 349 [2021-05-03 14:54:02,057 INFO L226 Difference]: Without dead ends: 334 [2021-05-03 14:54:02,057 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 116.1ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:54:02,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-05-03 14:54:02,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 199. [2021-05-03 14:54:02,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.9292929292929295) internal successors, (580), 198 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:02,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 580 transitions. [2021-05-03 14:54:02,060 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 580 transitions. Word has length 17 [2021-05-03 14:54:02,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:02,060 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 580 transitions. [2021-05-03 14:54:02,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:02,061 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 580 transitions. [2021-05-03 14:54:02,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:54:02,061 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:02,061 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:02,061 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-05-03 14:54:02,061 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:02,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:02,061 INFO L82 PathProgramCache]: Analyzing trace with hash -954827364, now seen corresponding path program 65 times [2021-05-03 14:54:02,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:02,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591669579] [2021-05-03 14:54:02,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:02,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:02,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:02,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591669579] [2021-05-03 14:54:02,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:54:02,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:54:02,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21453568] [2021-05-03 14:54:02,111 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:54:02,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:02,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:54:02,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:54:02,112 INFO L87 Difference]: Start difference. First operand 199 states and 580 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:02,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:02,285 INFO L93 Difference]: Finished difference Result 353 states and 951 transitions. [2021-05-03 14:54:02,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:02,286 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:54:02,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:02,286 INFO L225 Difference]: With dead ends: 353 [2021-05-03 14:54:02,286 INFO L226 Difference]: Without dead ends: 338 [2021-05-03 14:54:02,287 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 126.9ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:54:02,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-05-03 14:54:02,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 197. [2021-05-03 14:54:02,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.913265306122449) internal successors, (571), 196 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:02,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 571 transitions. [2021-05-03 14:54:02,290 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 571 transitions. Word has length 17 [2021-05-03 14:54:02,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:02,291 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 571 transitions. [2021-05-03 14:54:02,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:02,291 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 571 transitions. [2021-05-03 14:54:02,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:54:02,291 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:02,291 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:02,291 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-05-03 14:54:02,291 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:02,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:02,291 INFO L82 PathProgramCache]: Analyzing trace with hash 120883792, now seen corresponding path program 66 times [2021-05-03 14:54:02,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:02,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704775780] [2021-05-03 14:54:02,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:02,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:02,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:02,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704775780] [2021-05-03 14:54:02,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:54:02,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:54:02,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702368407] [2021-05-03 14:54:02,347 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:54:02,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:02,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:54:02,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:54:02,347 INFO L87 Difference]: Start difference. First operand 197 states and 571 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:02,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:02,466 INFO L93 Difference]: Finished difference Result 324 states and 891 transitions. [2021-05-03 14:54:02,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:02,467 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:54:02,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:02,467 INFO L225 Difference]: With dead ends: 324 [2021-05-03 14:54:02,467 INFO L226 Difference]: Without dead ends: 309 [2021-05-03 14:54:02,467 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 107.4ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:54:02,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-05-03 14:54:02,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 195. [2021-05-03 14:54:02,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.9072164948453607) internal successors, (564), 194 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:02,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 564 transitions. [2021-05-03 14:54:02,481 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 564 transitions. Word has length 17 [2021-05-03 14:54:02,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:02,481 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 564 transitions. [2021-05-03 14:54:02,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:02,481 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 564 transitions. [2021-05-03 14:54:02,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:54:02,481 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:02,481 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:02,482 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-05-03 14:54:02,482 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:02,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:02,482 INFO L82 PathProgramCache]: Analyzing trace with hash 409284692, now seen corresponding path program 67 times [2021-05-03 14:54:02,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:02,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472021400] [2021-05-03 14:54:02,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:02,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:02,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:02,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472021400] [2021-05-03 14:54:02,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:54:02,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:54:02,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54993059] [2021-05-03 14:54:02,524 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:54:02,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:02,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:54:02,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:54:02,525 INFO L87 Difference]: Start difference. First operand 195 states and 564 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:02,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:02,617 INFO L93 Difference]: Finished difference Result 442 states and 1201 transitions. [2021-05-03 14:54:02,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:02,617 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:54:02,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:02,618 INFO L225 Difference]: With dead ends: 442 [2021-05-03 14:54:02,618 INFO L226 Difference]: Without dead ends: 427 [2021-05-03 14:54:02,618 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 77.4ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:54:02,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-05-03 14:54:02,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 198. [2021-05-03 14:54:02,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.9238578680203045) internal successors, (576), 197 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:02,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 576 transitions. [2021-05-03 14:54:02,622 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 576 transitions. Word has length 17 [2021-05-03 14:54:02,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:02,622 INFO L480 AbstractCegarLoop]: Abstraction has 198 states and 576 transitions. [2021-05-03 14:54:02,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:02,622 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 576 transitions. [2021-05-03 14:54:02,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:54:02,622 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:02,622 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:02,622 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2021-05-03 14:54:02,622 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:02,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:02,622 INFO L82 PathProgramCache]: Analyzing trace with hash -840638728, now seen corresponding path program 68 times [2021-05-03 14:54:02,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:02,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945770838] [2021-05-03 14:54:02,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:02,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:02,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:02,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945770838] [2021-05-03 14:54:02,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:54:02,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:54:02,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916796791] [2021-05-03 14:54:02,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:54:02,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:02,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:54:02,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:54:02,661 INFO L87 Difference]: Start difference. First operand 198 states and 576 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:02,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:02,815 INFO L93 Difference]: Finished difference Result 465 states and 1248 transitions. [2021-05-03 14:54:02,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:02,815 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:54:02,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:02,816 INFO L225 Difference]: With dead ends: 465 [2021-05-03 14:54:02,816 INFO L226 Difference]: Without dead ends: 450 [2021-05-03 14:54:02,816 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 100.2ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:54:02,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-05-03 14:54:02,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 200. [2021-05-03 14:54:02,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.9396984924623117) internal successors, (585), 199 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:02,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 585 transitions. [2021-05-03 14:54:02,820 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 585 transitions. Word has length 17 [2021-05-03 14:54:02,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:02,820 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 585 transitions. [2021-05-03 14:54:02,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:02,820 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 585 transitions. [2021-05-03 14:54:02,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:54:02,821 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:02,821 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:02,821 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-05-03 14:54:02,821 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:02,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:02,821 INFO L82 PathProgramCache]: Analyzing trace with hash -2059274088, now seen corresponding path program 69 times [2021-05-03 14:54:02,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:02,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996768246] [2021-05-03 14:54:02,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:02,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:02,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:02,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996768246] [2021-05-03 14:54:02,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:54:02,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:54:02,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759974765] [2021-05-03 14:54:02,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:54:02,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:02,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:54:02,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:54:02,867 INFO L87 Difference]: Start difference. First operand 200 states and 585 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:03,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:03,005 INFO L93 Difference]: Finished difference Result 442 states and 1203 transitions. [2021-05-03 14:54:03,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:03,005 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:54:03,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:03,006 INFO L225 Difference]: With dead ends: 442 [2021-05-03 14:54:03,006 INFO L226 Difference]: Without dead ends: 427 [2021-05-03 14:54:03,006 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 110.0ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:54:03,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-05-03 14:54:03,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 196. [2021-05-03 14:54:03,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.917948717948718) internal successors, (569), 195 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:03,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 569 transitions. [2021-05-03 14:54:03,011 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 569 transitions. Word has length 17 [2021-05-03 14:54:03,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:03,011 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 569 transitions. [2021-05-03 14:54:03,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:03,011 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 569 transitions. [2021-05-03 14:54:03,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:54:03,011 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:03,011 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:03,011 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-05-03 14:54:03,012 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:03,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:03,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1005390608, now seen corresponding path program 70 times [2021-05-03 14:54:03,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:03,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42923631] [2021-05-03 14:54:03,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:03,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:03,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:03,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42923631] [2021-05-03 14:54:03,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:54:03,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:54:03,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084514892] [2021-05-03 14:54:03,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:54:03,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:03,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:54:03,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:54:03,066 INFO L87 Difference]: Start difference. First operand 196 states and 569 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:03,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:03,235 INFO L93 Difference]: Finished difference Result 393 states and 1085 transitions. [2021-05-03 14:54:03,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:03,235 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:54:03,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:03,236 INFO L225 Difference]: With dead ends: 393 [2021-05-03 14:54:03,236 INFO L226 Difference]: Without dead ends: 378 [2021-05-03 14:54:03,236 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 150.4ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:54:03,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-05-03 14:54:03,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 199. [2021-05-03 14:54:03,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.9292929292929295) internal successors, (580), 198 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:03,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 580 transitions. [2021-05-03 14:54:03,241 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 580 transitions. Word has length 17 [2021-05-03 14:54:03,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:03,241 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 580 transitions. [2021-05-03 14:54:03,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:03,242 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 580 transitions. [2021-05-03 14:54:03,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:54:03,242 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:03,243 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:03,243 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2021-05-03 14:54:03,244 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:03,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:03,244 INFO L82 PathProgramCache]: Analyzing trace with hash 184219092, now seen corresponding path program 71 times [2021-05-03 14:54:03,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:03,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169955309] [2021-05-03 14:54:03,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:03,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:03,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:03,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169955309] [2021-05-03 14:54:03,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:54:03,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:54:03,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154958634] [2021-05-03 14:54:03,301 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:54:03,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:03,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:54:03,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:54:03,302 INFO L87 Difference]: Start difference. First operand 199 states and 580 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:03,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:03,506 INFO L93 Difference]: Finished difference Result 391 states and 1089 transitions. [2021-05-03 14:54:03,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:03,506 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:54:03,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:03,507 INFO L225 Difference]: With dead ends: 391 [2021-05-03 14:54:03,507 INFO L226 Difference]: Without dead ends: 376 [2021-05-03 14:54:03,507 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 179.0ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:54:03,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-05-03 14:54:03,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 202. [2021-05-03 14:54:03,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.955223880597015) internal successors, (594), 201 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:03,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 594 transitions. [2021-05-03 14:54:03,511 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 594 transitions. Word has length 17 [2021-05-03 14:54:03,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:03,511 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 594 transitions. [2021-05-03 14:54:03,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:03,511 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 594 transitions. [2021-05-03 14:54:03,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:54:03,511 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:03,511 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:03,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-05-03 14:54:03,511 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:03,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:03,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1514501296, now seen corresponding path program 72 times [2021-05-03 14:54:03,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:03,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048520552] [2021-05-03 14:54:03,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:03,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:03,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:03,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048520552] [2021-05-03 14:54:03,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:54:03,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:54:03,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891203234] [2021-05-03 14:54:03,581 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:54:03,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:03,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:54:03,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:54:03,581 INFO L87 Difference]: Start difference. First operand 202 states and 594 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:03,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:03,762 INFO L93 Difference]: Finished difference Result 368 states and 1044 transitions. [2021-05-03 14:54:03,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:03,763 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:54:03,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:03,763 INFO L225 Difference]: With dead ends: 368 [2021-05-03 14:54:03,764 INFO L226 Difference]: Without dead ends: 353 [2021-05-03 14:54:03,764 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 169.2ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:54:03,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-05-03 14:54:03,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 196. [2021-05-03 14:54:03,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.917948717948718) internal successors, (569), 195 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:03,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 569 transitions. [2021-05-03 14:54:03,767 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 569 transitions. Word has length 17 [2021-05-03 14:54:03,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:03,767 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 569 transitions. [2021-05-03 14:54:03,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:03,767 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 569 transitions. [2021-05-03 14:54:03,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:54:03,768 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:03,768 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:03,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2021-05-03 14:54:03,768 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:03,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:03,768 INFO L82 PathProgramCache]: Analyzing trace with hash 81063412, now seen corresponding path program 73 times [2021-05-03 14:54:03,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:03,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423227307] [2021-05-03 14:54:03,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:03,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:03,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:03,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423227307] [2021-05-03 14:54:03,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:54:03,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:54:03,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648738960] [2021-05-03 14:54:03,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:54:03,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:03,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:54:03,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:54:03,812 INFO L87 Difference]: Start difference. First operand 196 states and 569 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:03,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:03,948 INFO L93 Difference]: Finished difference Result 445 states and 1229 transitions. [2021-05-03 14:54:03,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:03,949 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:54:03,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:03,961 INFO L225 Difference]: With dead ends: 445 [2021-05-03 14:54:03,961 INFO L226 Difference]: Without dead ends: 430 [2021-05-03 14:54:03,961 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 100.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:54:03,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-05-03 14:54:03,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 199. [2021-05-03 14:54:03,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.9494949494949494) internal successors, (584), 198 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:03,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 584 transitions. [2021-05-03 14:54:03,965 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 584 transitions. Word has length 17 [2021-05-03 14:54:03,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:03,965 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 584 transitions. [2021-05-03 14:54:03,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:03,966 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 584 transitions. [2021-05-03 14:54:03,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:54:03,966 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:03,966 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:03,966 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2021-05-03 14:54:03,966 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:03,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:03,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1137571948, now seen corresponding path program 74 times [2021-05-03 14:54:03,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:03,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350442808] [2021-05-03 14:54:03,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:03,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:04,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:04,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350442808] [2021-05-03 14:54:04,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:54:04,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:54:04,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646866549] [2021-05-03 14:54:04,017 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:54:04,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:04,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:54:04,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:54:04,018 INFO L87 Difference]: Start difference. First operand 199 states and 584 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:04,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:04,179 INFO L93 Difference]: Finished difference Result 443 states and 1222 transitions. [2021-05-03 14:54:04,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:04,180 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:54:04,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:04,181 INFO L225 Difference]: With dead ends: 443 [2021-05-03 14:54:04,181 INFO L226 Difference]: Without dead ends: 428 [2021-05-03 14:54:04,181 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 103.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:54:04,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-05-03 14:54:04,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 197. [2021-05-03 14:54:04,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.933673469387755) internal successors, (575), 196 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:04,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 575 transitions. [2021-05-03 14:54:04,185 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 575 transitions. Word has length 17 [2021-05-03 14:54:04,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:04,185 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 575 transitions. [2021-05-03 14:54:04,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:04,185 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 575 transitions. [2021-05-03 14:54:04,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:54:04,185 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:04,185 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:04,185 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2021-05-03 14:54:04,185 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:04,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:04,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1070123960, now seen corresponding path program 75 times [2021-05-03 14:54:04,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:04,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371938565] [2021-05-03 14:54:04,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:04,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:04,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:04,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371938565] [2021-05-03 14:54:04,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:54:04,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:54:04,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921772586] [2021-05-03 14:54:04,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:54:04,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:04,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:54:04,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:54:04,237 INFO L87 Difference]: Start difference. First operand 197 states and 575 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:04,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:04,416 INFO L93 Difference]: Finished difference Result 437 states and 1201 transitions. [2021-05-03 14:54:04,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:04,417 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:54:04,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:04,418 INFO L225 Difference]: With dead ends: 437 [2021-05-03 14:54:04,418 INFO L226 Difference]: Without dead ends: 422 [2021-05-03 14:54:04,418 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 139.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:54:04,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-05-03 14:54:04,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 200. [2021-05-03 14:54:04,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.959798994974874) internal successors, (589), 199 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:04,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 589 transitions. [2021-05-03 14:54:04,422 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 589 transitions. Word has length 17 [2021-05-03 14:54:04,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:04,422 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 589 transitions. [2021-05-03 14:54:04,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:04,422 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 589 transitions. [2021-05-03 14:54:04,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:54:04,422 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:04,422 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:04,423 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2021-05-03 14:54:04,423 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:04,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:04,423 INFO L82 PathProgramCache]: Analyzing trace with hash -100065036, now seen corresponding path program 76 times [2021-05-03 14:54:04,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:04,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141242592] [2021-05-03 14:54:04,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:04,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:04,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:04,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141242592] [2021-05-03 14:54:04,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:54:04,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:54:04,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342760553] [2021-05-03 14:54:04,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:54:04,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:04,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:54:04,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:54:04,480 INFO L87 Difference]: Start difference. First operand 200 states and 589 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:04,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:04,660 INFO L93 Difference]: Finished difference Result 421 states and 1178 transitions. [2021-05-03 14:54:04,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:04,660 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:54:04,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:04,661 INFO L225 Difference]: With dead ends: 421 [2021-05-03 14:54:04,661 INFO L226 Difference]: Without dead ends: 406 [2021-05-03 14:54:04,661 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 142.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:54:04,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-05-03 14:54:04,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 197. [2021-05-03 14:54:04,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.933673469387755) internal successors, (575), 196 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:04,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 575 transitions. [2021-05-03 14:54:04,665 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 575 transitions. Word has length 17 [2021-05-03 14:54:04,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:04,665 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 575 transitions. [2021-05-03 14:54:04,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:04,665 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 575 transitions. [2021-05-03 14:54:04,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:54:04,665 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:04,665 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:04,665 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2021-05-03 14:54:04,666 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:04,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:04,666 INFO L82 PathProgramCache]: Analyzing trace with hash -117002088, now seen corresponding path program 77 times [2021-05-03 14:54:04,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:04,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930950533] [2021-05-03 14:54:04,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:04,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:04,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:04,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930950533] [2021-05-03 14:54:04,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:54:04,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:54:04,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447936556] [2021-05-03 14:54:04,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:54:04,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:04,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:54:04,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:54:04,724 INFO L87 Difference]: Start difference. First operand 197 states and 575 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:04,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:04,871 INFO L93 Difference]: Finished difference Result 405 states and 1129 transitions. [2021-05-03 14:54:04,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:04,872 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:54:04,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:04,872 INFO L225 Difference]: With dead ends: 405 [2021-05-03 14:54:04,872 INFO L226 Difference]: Without dead ends: 390 [2021-05-03 14:54:04,873 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 112.9ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:54:04,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-05-03 14:54:04,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 199. [2021-05-03 14:54:04,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.9494949494949494) internal successors, (584), 198 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:04,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 584 transitions. [2021-05-03 14:54:04,876 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 584 transitions. Word has length 17 [2021-05-03 14:54:04,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:04,876 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 584 transitions. [2021-05-03 14:54:04,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:04,877 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 584 transitions. [2021-05-03 14:54:04,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:54:04,877 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:04,877 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:04,877 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2021-05-03 14:54:04,877 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:04,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:04,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1023281748, now seen corresponding path program 78 times [2021-05-03 14:54:04,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:04,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90704608] [2021-05-03 14:54:04,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:04,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:04,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:04,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90704608] [2021-05-03 14:54:04,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:54:04,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:54:04,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982783489] [2021-05-03 14:54:04,923 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:54:04,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:04,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:54:04,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:54:04,923 INFO L87 Difference]: Start difference. First operand 199 states and 584 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:05,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:05,089 INFO L93 Difference]: Finished difference Result 384 states and 1091 transitions. [2021-05-03 14:54:05,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:05,089 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:54:05,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:05,090 INFO L225 Difference]: With dead ends: 384 [2021-05-03 14:54:05,090 INFO L226 Difference]: Without dead ends: 369 [2021-05-03 14:54:05,090 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 110.1ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:54:05,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-05-03 14:54:05,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 195. [2021-05-03 14:54:05,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.9072164948453607) internal successors, (564), 194 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:05,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 564 transitions. [2021-05-03 14:54:05,094 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 564 transitions. Word has length 17 [2021-05-03 14:54:05,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:05,094 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 564 transitions. [2021-05-03 14:54:05,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:05,094 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 564 transitions. [2021-05-03 14:54:05,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:54:05,094 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:05,094 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:05,095 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2021-05-03 14:54:05,095 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:05,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:05,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1228196736, now seen corresponding path program 79 times [2021-05-03 14:54:05,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:05,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085857615] [2021-05-03 14:54:05,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:05,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:05,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:05,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085857615] [2021-05-03 14:54:05,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:54:05,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:54:05,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131215790] [2021-05-03 14:54:05,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:54:05,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:05,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:54:05,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:54:05,141 INFO L87 Difference]: Start difference. First operand 195 states and 564 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:05,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:05,309 INFO L93 Difference]: Finished difference Result 425 states and 1163 transitions. [2021-05-03 14:54:05,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:05,309 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:54:05,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:05,310 INFO L225 Difference]: With dead ends: 425 [2021-05-03 14:54:05,310 INFO L226 Difference]: Without dead ends: 410 [2021-05-03 14:54:05,310 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 120.1ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:54:05,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-05-03 14:54:05,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 200. [2021-05-03 14:54:05,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.9396984924623117) internal successors, (585), 199 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:05,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 585 transitions. [2021-05-03 14:54:05,314 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 585 transitions. Word has length 17 [2021-05-03 14:54:05,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:05,314 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 585 transitions. [2021-05-03 14:54:05,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:05,314 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 585 transitions. [2021-05-03 14:54:05,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:54:05,315 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:05,315 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:05,315 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2021-05-03 14:54:05,315 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:05,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:05,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1848135200, now seen corresponding path program 80 times [2021-05-03 14:54:05,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:05,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513877095] [2021-05-03 14:54:05,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:05,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:05,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:05,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513877095] [2021-05-03 14:54:05,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:54:05,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:54:05,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464642429] [2021-05-03 14:54:05,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:54:05,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:05,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:54:05,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:54:05,367 INFO L87 Difference]: Start difference. First operand 200 states and 585 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:05,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:05,520 INFO L93 Difference]: Finished difference Result 429 states and 1169 transitions. [2021-05-03 14:54:05,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:05,521 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:54:05,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:05,522 INFO L225 Difference]: With dead ends: 429 [2021-05-03 14:54:05,522 INFO L226 Difference]: Without dead ends: 414 [2021-05-03 14:54:05,522 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 117.5ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:54:05,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-05-03 14:54:05,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 198. [2021-05-03 14:54:05,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.9238578680203045) internal successors, (576), 197 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:05,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 576 transitions. [2021-05-03 14:54:05,526 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 576 transitions. Word has length 17 [2021-05-03 14:54:05,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:05,526 INFO L480 AbstractCegarLoop]: Abstraction has 198 states and 576 transitions. [2021-05-03 14:54:05,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:05,526 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 576 transitions. [2021-05-03 14:54:05,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:54:05,526 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:05,526 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:05,526 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2021-05-03 14:54:05,526 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:05,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:05,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1371120940, now seen corresponding path program 81 times [2021-05-03 14:54:05,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:05,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932045421] [2021-05-03 14:54:05,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:05,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:05,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:05,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932045421] [2021-05-03 14:54:05,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:54:05,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:54:05,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044634893] [2021-05-03 14:54:05,579 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:54:05,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:05,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:54:05,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:54:05,580 INFO L87 Difference]: Start difference. First operand 198 states and 576 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:05,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:05,691 INFO L93 Difference]: Finished difference Result 429 states and 1163 transitions. [2021-05-03 14:54:05,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:05,692 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:54:05,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:05,693 INFO L225 Difference]: With dead ends: 429 [2021-05-03 14:54:05,693 INFO L226 Difference]: Without dead ends: 414 [2021-05-03 14:54:05,693 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 94.2ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:54:05,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-05-03 14:54:05,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 196. [2021-05-03 14:54:05,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.917948717948718) internal successors, (569), 195 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:05,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 569 transitions. [2021-05-03 14:54:05,697 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 569 transitions. Word has length 17 [2021-05-03 14:54:05,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:05,697 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 569 transitions. [2021-05-03 14:54:05,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:05,697 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 569 transitions. [2021-05-03 14:54:05,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:54:05,697 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:05,697 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:05,697 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2021-05-03 14:54:05,697 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:05,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:05,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1608879492, now seen corresponding path program 82 times [2021-05-03 14:54:05,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:05,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202516782] [2021-05-03 14:54:05,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:05,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:05,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:05,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202516782] [2021-05-03 14:54:05,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:54:05,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:54:05,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298771147] [2021-05-03 14:54:05,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:54:05,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:05,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:54:05,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:54:05,752 INFO L87 Difference]: Start difference. First operand 196 states and 569 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:05,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:05,902 INFO L93 Difference]: Finished difference Result 451 states and 1224 transitions. [2021-05-03 14:54:05,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:05,903 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:54:05,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:05,904 INFO L225 Difference]: With dead ends: 451 [2021-05-03 14:54:05,904 INFO L226 Difference]: Without dead ends: 436 [2021-05-03 14:54:05,904 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 113.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:54:05,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-05-03 14:54:05,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 199. [2021-05-03 14:54:05,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.9494949494949494) internal successors, (584), 198 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:05,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 584 transitions. [2021-05-03 14:54:05,908 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 584 transitions. Word has length 17 [2021-05-03 14:54:05,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:05,908 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 584 transitions. [2021-05-03 14:54:05,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:05,908 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 584 transitions. [2021-05-03 14:54:05,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:54:05,908 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:05,908 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:05,909 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2021-05-03 14:54:05,909 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:05,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:05,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1467452444, now seen corresponding path program 83 times [2021-05-03 14:54:05,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:05,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640012569] [2021-05-03 14:54:05,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:05,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:05,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:05,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640012569] [2021-05-03 14:54:05,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:54:05,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:54:05,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873789504] [2021-05-03 14:54:05,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:54:05,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:05,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:54:05,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:54:05,964 INFO L87 Difference]: Start difference. First operand 199 states and 584 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:06,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:06,122 INFO L93 Difference]: Finished difference Result 455 states and 1230 transitions. [2021-05-03 14:54:06,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:06,122 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:54:06,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:06,123 INFO L225 Difference]: With dead ends: 455 [2021-05-03 14:54:06,123 INFO L226 Difference]: Without dead ends: 440 [2021-05-03 14:54:06,124 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 112.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:54:06,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-05-03 14:54:06,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 197. [2021-05-03 14:54:06,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.933673469387755) internal successors, (575), 196 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:06,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 575 transitions. [2021-05-03 14:54:06,127 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 575 transitions. Word has length 17 [2021-05-03 14:54:06,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:06,127 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 575 transitions. [2021-05-03 14:54:06,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:06,127 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 575 transitions. [2021-05-03 14:54:06,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:54:06,128 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:06,128 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:06,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2021-05-03 14:54:06,128 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:06,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:06,128 INFO L82 PathProgramCache]: Analyzing trace with hash -619818944, now seen corresponding path program 84 times [2021-05-03 14:54:06,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:06,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186269922] [2021-05-03 14:54:06,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:06,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:06,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:06,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186269922] [2021-05-03 14:54:06,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:54:06,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:54:06,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618015957] [2021-05-03 14:54:06,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:54:06,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:06,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:54:06,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:54:06,188 INFO L87 Difference]: Start difference. First operand 197 states and 575 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:06,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:06,370 INFO L93 Difference]: Finished difference Result 422 states and 1158 transitions. [2021-05-03 14:54:06,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:06,370 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:54:06,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:06,371 INFO L225 Difference]: With dead ends: 422 [2021-05-03 14:54:06,371 INFO L226 Difference]: Without dead ends: 407 [2021-05-03 14:54:06,371 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 143.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:54:06,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-05-03 14:54:06,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 200. [2021-05-03 14:54:06,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.959798994974874) internal successors, (589), 199 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:06,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 589 transitions. [2021-05-03 14:54:06,375 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 589 transitions. Word has length 17 [2021-05-03 14:54:06,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:06,375 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 589 transitions. [2021-05-03 14:54:06,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:06,375 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 589 transitions. [2021-05-03 14:54:06,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:54:06,375 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:06,375 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:06,375 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2021-05-03 14:54:06,375 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:06,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:06,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1790007940, now seen corresponding path program 85 times [2021-05-03 14:54:06,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:06,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334970245] [2021-05-03 14:54:06,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:06,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:06,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:06,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334970245] [2021-05-03 14:54:06,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:54:06,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:54:06,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51441814] [2021-05-03 14:54:06,429 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:54:06,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:06,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:54:06,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:54:06,430 INFO L87 Difference]: Start difference. First operand 200 states and 589 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:06,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:06,596 INFO L93 Difference]: Finished difference Result 406 states and 1135 transitions. [2021-05-03 14:54:06,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:06,596 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:54:06,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:06,597 INFO L225 Difference]: With dead ends: 406 [2021-05-03 14:54:06,597 INFO L226 Difference]: Without dead ends: 391 [2021-05-03 14:54:06,597 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 133.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:54:06,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-05-03 14:54:06,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 197. [2021-05-03 14:54:06,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.933673469387755) internal successors, (575), 196 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:06,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 575 transitions. [2021-05-03 14:54:06,600 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 575 transitions. Word has length 17 [2021-05-03 14:54:06,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:06,600 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 575 transitions. [2021-05-03 14:54:06,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:06,600 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 575 transitions. [2021-05-03 14:54:06,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:54:06,601 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:06,601 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:06,601 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2021-05-03 14:54:06,601 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:06,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:06,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1806944992, now seen corresponding path program 86 times [2021-05-03 14:54:06,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:06,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115013504] [2021-05-03 14:54:06,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:06,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:06,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:06,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115013504] [2021-05-03 14:54:06,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:54:06,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:54:06,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8836727] [2021-05-03 14:54:06,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:54:06,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:06,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:54:06,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:54:06,649 INFO L87 Difference]: Start difference. First operand 197 states and 575 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:06,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:06,793 INFO L93 Difference]: Finished difference Result 440 states and 1205 transitions. [2021-05-03 14:54:06,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:06,794 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:54:06,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:06,795 INFO L225 Difference]: With dead ends: 440 [2021-05-03 14:54:06,795 INFO L226 Difference]: Without dead ends: 425 [2021-05-03 14:54:06,795 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 102.3ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:54:06,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-05-03 14:54:06,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 199. [2021-05-03 14:54:06,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.9494949494949494) internal successors, (584), 198 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:06,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 584 transitions. [2021-05-03 14:54:06,798 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 584 transitions. Word has length 17 [2021-05-03 14:54:06,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:06,798 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 584 transitions. [2021-05-03 14:54:06,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:06,799 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 584 transitions. [2021-05-03 14:54:06,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:54:06,799 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:06,799 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:06,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2021-05-03 14:54:06,799 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:06,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:06,799 INFO L82 PathProgramCache]: Analyzing trace with hash -666661156, now seen corresponding path program 87 times [2021-05-03 14:54:06,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:06,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319328006] [2021-05-03 14:54:06,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:06,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:06,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:06,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319328006] [2021-05-03 14:54:06,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:54:06,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:54:06,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063587318] [2021-05-03 14:54:06,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:54:06,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:06,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:54:06,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:54:06,851 INFO L87 Difference]: Start difference. First operand 199 states and 584 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:07,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:07,002 INFO L93 Difference]: Finished difference Result 419 states and 1167 transitions. [2021-05-03 14:54:07,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:07,002 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:54:07,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:07,003 INFO L225 Difference]: With dead ends: 419 [2021-05-03 14:54:07,003 INFO L226 Difference]: Without dead ends: 404 [2021-05-03 14:54:07,003 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 107.5ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:54:07,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-05-03 14:54:07,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 196. [2021-05-03 14:54:07,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.917948717948718) internal successors, (569), 195 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:07,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 569 transitions. [2021-05-03 14:54:07,006 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 569 transitions. Word has length 17 [2021-05-03 14:54:07,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:07,007 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 569 transitions. [2021-05-03 14:54:07,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:07,007 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 569 transitions. [2021-05-03 14:54:07,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:54:07,007 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:07,007 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:07,007 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2021-05-03 14:54:07,007 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:07,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:07,007 INFO L82 PathProgramCache]: Analyzing trace with hash 201773648, now seen corresponding path program 88 times [2021-05-03 14:54:07,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:07,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918190604] [2021-05-03 14:54:07,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:07,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:07,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:07,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918190604] [2021-05-03 14:54:07,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:54:07,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:54:07,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960740599] [2021-05-03 14:54:07,059 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:54:07,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:07,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:54:07,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:54:07,060 INFO L87 Difference]: Start difference. First operand 196 states and 569 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:07,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:07,180 INFO L93 Difference]: Finished difference Result 382 states and 1052 transitions. [2021-05-03 14:54:07,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:07,181 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:54:07,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:07,189 INFO L225 Difference]: With dead ends: 382 [2021-05-03 14:54:07,189 INFO L226 Difference]: Without dead ends: 367 [2021-05-03 14:54:07,189 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 95.7ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:54:07,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-05-03 14:54:07,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 198. [2021-05-03 14:54:07,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.9238578680203045) internal successors, (576), 197 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:07,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 576 transitions. [2021-05-03 14:54:07,193 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 576 transitions. Word has length 17 [2021-05-03 14:54:07,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:07,193 INFO L480 AbstractCegarLoop]: Abstraction has 198 states and 576 transitions. [2021-05-03 14:54:07,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:07,193 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 576 transitions. [2021-05-03 14:54:07,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:54:07,194 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:07,194 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:07,194 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2021-05-03 14:54:07,194 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:07,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:07,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1159324884, now seen corresponding path program 89 times [2021-05-03 14:54:07,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:07,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886674852] [2021-05-03 14:54:07,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:07,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:07,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:07,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886674852] [2021-05-03 14:54:07,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:54:07,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:54:07,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147058594] [2021-05-03 14:54:07,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:54:07,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:07,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:54:07,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:54:07,238 INFO L87 Difference]: Start difference. First operand 198 states and 576 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:07,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:07,382 INFO L93 Difference]: Finished difference Result 383 states and 1063 transitions. [2021-05-03 14:54:07,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:07,383 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:54:07,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:07,383 INFO L225 Difference]: With dead ends: 383 [2021-05-03 14:54:07,383 INFO L226 Difference]: Without dead ends: 368 [2021-05-03 14:54:07,384 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 113.2ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:54:07,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-05-03 14:54:07,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 200. [2021-05-03 14:54:07,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.9396984924623117) internal successors, (585), 199 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:07,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 585 transitions. [2021-05-03 14:54:07,387 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 585 transitions. Word has length 17 [2021-05-03 14:54:07,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:07,387 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 585 transitions. [2021-05-03 14:54:07,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:07,387 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 585 transitions. [2021-05-03 14:54:07,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:54:07,387 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:07,387 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:07,387 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2021-05-03 14:54:07,387 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:07,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:07,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1995358576, now seen corresponding path program 90 times [2021-05-03 14:54:07,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:07,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872731617] [2021-05-03 14:54:07,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:07,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:07,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:07,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872731617] [2021-05-03 14:54:07,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:54:07,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:54:07,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412621434] [2021-05-03 14:54:07,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:54:07,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:07,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:54:07,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:54:07,431 INFO L87 Difference]: Start difference. First operand 200 states and 585 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:07,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:07,564 INFO L93 Difference]: Finished difference Result 362 states and 1025 transitions. [2021-05-03 14:54:07,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:07,564 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 [2021-05-03 14:54:07,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:07,565 INFO L225 Difference]: With dead ends: 362 [2021-05-03 14:54:07,565 INFO L226 Difference]: Without dead ends: 347 [2021-05-03 14:54:07,565 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 101.8ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:54:07,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-05-03 14:54:07,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 195. [2021-05-03 14:54:07,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.9072164948453607) internal successors, (564), 194 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:07,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 564 transitions. [2021-05-03 14:54:07,568 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 564 transitions. Word has length 17 [2021-05-03 14:54:07,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:07,568 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 564 transitions. [2021-05-03 14:54:07,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-05-03 14:54:07,568 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 564 transitions. [2021-05-03 14:54:07,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:07,569 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:07,569 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:07,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2021-05-03 14:54:07,569 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:07,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:07,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1106194689, now seen corresponding path program 1 times [2021-05-03 14:54:07,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:07,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137780345] [2021-05-03 14:54:07,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:07,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:07,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:07,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137780345] [2021-05-03 14:54:07,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143030677] [2021-05-03 14:54:07,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:07,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:07,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:07,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:07,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:07,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:07,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 14:54:07,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606550177] [2021-05-03 14:54:07,912 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:54:07,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:07,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:54:07,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:54:07,914 INFO L87 Difference]: Start difference. First operand 195 states and 564 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:08,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:08,066 INFO L93 Difference]: Finished difference Result 363 states and 1031 transitions. [2021-05-03 14:54:08,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:08,066 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:08,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:08,074 INFO L225 Difference]: With dead ends: 363 [2021-05-03 14:54:08,075 INFO L226 Difference]: Without dead ends: 344 [2021-05-03 14:54:08,075 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 148.1ms TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:54:08,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-05-03 14:54:08,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 208. [2021-05-03 14:54:08,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.9613526570048307) internal successors, (613), 207 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:08,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 613 transitions. [2021-05-03 14:54:08,081 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 613 transitions. Word has length 18 [2021-05-03 14:54:08,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:08,081 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 613 transitions. [2021-05-03 14:54:08,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:08,081 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 613 transitions. [2021-05-03 14:54:08,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:08,083 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:08,083 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:08,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-05-03 14:54:08,297 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:08,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:08,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1981219535, now seen corresponding path program 2 times [2021-05-03 14:54:08,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:08,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160074593] [2021-05-03 14:54:08,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:08,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:08,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:08,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160074593] [2021-05-03 14:54:08,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380042075] [2021-05-03 14:54:08,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:08,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:54:08,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:08,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:08,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:08,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:08,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:08,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-03 14:54:08,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814658137] [2021-05-03 14:54:08,494 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:54:08,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:08,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:54:08,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:54:08,494 INFO L87 Difference]: Start difference. First operand 208 states and 613 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:08,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:08,650 INFO L93 Difference]: Finished difference Result 405 states and 1139 transitions. [2021-05-03 14:54:08,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:08,650 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:08,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:08,651 INFO L225 Difference]: With dead ends: 405 [2021-05-03 14:54:08,651 INFO L226 Difference]: Without dead ends: 386 [2021-05-03 14:54:08,652 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 141.5ms TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:54:08,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-05-03 14:54:08,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 214. [2021-05-03 14:54:08,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 3.004694835680751) internal successors, (640), 213 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:08,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 640 transitions. [2021-05-03 14:54:08,657 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 640 transitions. Word has length 18 [2021-05-03 14:54:08,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:08,657 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 640 transitions. [2021-05-03 14:54:08,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:08,657 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 640 transitions. [2021-05-03 14:54:08,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:08,657 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:08,658 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:08,873 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:08,874 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:08,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:08,874 INFO L82 PathProgramCache]: Analyzing trace with hash 615027373, now seen corresponding path program 3 times [2021-05-03 14:54:08,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:08,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945163330] [2021-05-03 14:54:08,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:08,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:08,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:08,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945163330] [2021-05-03 14:54:08,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583244900] [2021-05-03 14:54:08,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:54:08,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 14:54:08,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:08,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:08,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:09,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:09,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:09,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 14:54:09,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200534027] [2021-05-03 14:54:09,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:54:09,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:09,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:54:09,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:54:09,042 INFO L87 Difference]: Start difference. First operand 214 states and 640 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:09,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:09,197 INFO L93 Difference]: Finished difference Result 384 states and 1093 transitions. [2021-05-03 14:54:09,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:09,198 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:09,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:09,198 INFO L225 Difference]: With dead ends: 384 [2021-05-03 14:54:09,199 INFO L226 Difference]: Without dead ends: 365 [2021-05-03 14:54:09,199 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 125.1ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:54:09,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-05-03 14:54:09,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 206. [2021-05-03 14:54:09,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.9658536585365853) internal successors, (608), 205 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:09,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 608 transitions. [2021-05-03 14:54:09,202 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 608 transitions. Word has length 18 [2021-05-03 14:54:09,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:09,202 INFO L480 AbstractCegarLoop]: Abstraction has 206 states and 608 transitions. [2021-05-03 14:54:09,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:09,202 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 608 transitions. [2021-05-03 14:54:09,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:09,203 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:09,203 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:09,419 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-05-03 14:54:09,419 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:09,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:09,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1804293443, now seen corresponding path program 4 times [2021-05-03 14:54:09,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:09,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954616228] [2021-05-03 14:54:09,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:09,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:09,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:09,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954616228] [2021-05-03 14:54:09,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868109069] [2021-05-03 14:54:09,462 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:09,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:54:09,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:09,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:09,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:09,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:09,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:09,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 14:54:09,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641225220] [2021-05-03 14:54:09,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:54:09,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:09,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:54:09,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:54:09,564 INFO L87 Difference]: Start difference. First operand 206 states and 608 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:09,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:09,704 INFO L93 Difference]: Finished difference Result 395 states and 1126 transitions. [2021-05-03 14:54:09,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:09,704 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:09,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:09,705 INFO L225 Difference]: With dead ends: 395 [2021-05-03 14:54:09,705 INFO L226 Difference]: Without dead ends: 376 [2021-05-03 14:54:09,705 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 128.9ms TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:54:09,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-05-03 14:54:09,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 212. [2021-05-03 14:54:09,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.990521327014218) internal successors, (631), 211 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:09,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 631 transitions. [2021-05-03 14:54:09,709 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 631 transitions. Word has length 18 [2021-05-03 14:54:09,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:09,709 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 631 transitions. [2021-05-03 14:54:09,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:09,709 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 631 transitions. [2021-05-03 14:54:09,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:09,711 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:09,711 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:09,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-05-03 14:54:09,917 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:09,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:09,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1778517959, now seen corresponding path program 5 times [2021-05-03 14:54:09,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:09,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160808222] [2021-05-03 14:54:09,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:09,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:09,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:09,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160808222] [2021-05-03 14:54:09,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388305448] [2021-05-03 14:54:09,978 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:10,003 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:54:10,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:10,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:10,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:10,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:10,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:10,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 14:54:10,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425691226] [2021-05-03 14:54:10,097 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:54:10,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:10,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:54:10,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:54:10,098 INFO L87 Difference]: Start difference. First operand 212 states and 631 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:10,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:10,265 INFO L93 Difference]: Finished difference Result 437 states and 1235 transitions. [2021-05-03 14:54:10,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:10,265 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:10,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:10,266 INFO L225 Difference]: With dead ends: 437 [2021-05-03 14:54:10,266 INFO L226 Difference]: Without dead ends: 418 [2021-05-03 14:54:10,266 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 134.3ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:54:10,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-05-03 14:54:10,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 216. [2021-05-03 14:54:10,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 3.027906976744186) internal successors, (651), 215 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:10,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 651 transitions. [2021-05-03 14:54:10,270 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 651 transitions. Word has length 18 [2021-05-03 14:54:10,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:10,270 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 651 transitions. [2021-05-03 14:54:10,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:10,270 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 651 transitions. [2021-05-03 14:54:10,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:10,270 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:10,270 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:10,484 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-05-03 14:54:10,485 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:10,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:10,485 INFO L82 PathProgramCache]: Analyzing trace with hash 79797571, now seen corresponding path program 6 times [2021-05-03 14:54:10,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:10,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353455586] [2021-05-03 14:54:10,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:10,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:10,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:10,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353455586] [2021-05-03 14:54:10,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088605114] [2021-05-03 14:54:10,535 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:10,560 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 14:54:10,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:10,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:10,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:10,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:10,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:10,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-03 14:54:10,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010756348] [2021-05-03 14:54:10,623 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:54:10,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:10,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:54:10,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:54:10,623 INFO L87 Difference]: Start difference. First operand 216 states and 651 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:10,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:10,790 INFO L93 Difference]: Finished difference Result 408 states and 1169 transitions. [2021-05-03 14:54:10,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:10,790 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:10,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:10,791 INFO L225 Difference]: With dead ends: 408 [2021-05-03 14:54:10,791 INFO L226 Difference]: Without dead ends: 389 [2021-05-03 14:54:10,791 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 116.8ms TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:54:10,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-05-03 14:54:10,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 202. [2021-05-03 14:54:10,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 3.0049751243781095) internal successors, (604), 201 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:10,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 604 transitions. [2021-05-03 14:54:10,795 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 604 transitions. Word has length 18 [2021-05-03 14:54:10,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:10,795 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 604 transitions. [2021-05-03 14:54:10,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:10,795 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 604 transitions. [2021-05-03 14:54:10,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:10,795 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:10,795 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:11,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:11,005 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:11,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:11,005 INFO L82 PathProgramCache]: Analyzing trace with hash 948617417, now seen corresponding path program 1 times [2021-05-03 14:54:11,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:11,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735098805] [2021-05-03 14:54:11,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:11,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:11,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:11,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735098805] [2021-05-03 14:54:11,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:54:11,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:54:11,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329243081] [2021-05-03 14:54:11,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:54:11,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:11,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:54:11,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:54:11,064 INFO L87 Difference]: Start difference. First operand 202 states and 604 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) [2021-05-03 14:54:11,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:11,140 INFO L93 Difference]: Finished difference Result 424 states and 1195 transitions. [2021-05-03 14:54:11,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 14:54:11,141 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 [2021-05-03 14:54:11,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:11,141 INFO L225 Difference]: With dead ends: 424 [2021-05-03 14:54:11,141 INFO L226 Difference]: Without dead ends: 366 [2021-05-03 14:54:11,141 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 81.3ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:54:11,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-05-03 14:54:11,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 252. [2021-05-03 14:54:11,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.9322709163346614) internal successors, (736), 251 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:11,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 736 transitions. [2021-05-03 14:54:11,145 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 736 transitions. Word has length 18 [2021-05-03 14:54:11,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:11,145 INFO L480 AbstractCegarLoop]: Abstraction has 252 states and 736 transitions. [2021-05-03 14:54:11,146 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) [2021-05-03 14:54:11,146 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 736 transitions. [2021-05-03 14:54:11,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:11,146 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:11,146 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:11,146 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2021-05-03 14:54:11,146 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:11,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:11,146 INFO L82 PathProgramCache]: Analyzing trace with hash 864569794, now seen corresponding path program 1 times [2021-05-03 14:54:11,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:11,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643929282] [2021-05-03 14:54:11,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:11,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:11,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:11,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643929282] [2021-05-03 14:54:11,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:54:11,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:54:11,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144156560] [2021-05-03 14:54:11,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:54:11,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:11,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:54:11,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:54:11,202 INFO L87 Difference]: Start difference. First operand 252 states and 736 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) [2021-05-03 14:54:11,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:11,283 INFO L93 Difference]: Finished difference Result 445 states and 1245 transitions. [2021-05-03 14:54:11,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 14:54:11,283 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 [2021-05-03 14:54:11,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:11,284 INFO L225 Difference]: With dead ends: 445 [2021-05-03 14:54:11,284 INFO L226 Difference]: Without dead ends: 358 [2021-05-03 14:54:11,284 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 79.2ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:54:11,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-05-03 14:54:11,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 269. [2021-05-03 14:54:11,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.921641791044776) internal successors, (783), 268 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:11,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 783 transitions. [2021-05-03 14:54:11,288 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 783 transitions. Word has length 18 [2021-05-03 14:54:11,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:11,288 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 783 transitions. [2021-05-03 14:54:11,288 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) [2021-05-03 14:54:11,288 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 783 transitions. [2021-05-03 14:54:11,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:11,288 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:11,288 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:11,289 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2021-05-03 14:54:11,289 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:11,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:11,289 INFO L82 PathProgramCache]: Analyzing trace with hash -966424801, now seen corresponding path program 7 times [2021-05-03 14:54:11,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:11,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302436005] [2021-05-03 14:54:11,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:11,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:11,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:11,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302436005] [2021-05-03 14:54:11,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349639389] [2021-05-03 14:54:11,333 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:11,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:11,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:11,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:11,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:11,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:11,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 14:54:11,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273922836] [2021-05-03 14:54:11,478 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:54:11,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:11,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:54:11,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:54:11,478 INFO L87 Difference]: Start difference. First operand 269 states and 783 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:11,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:11,629 INFO L93 Difference]: Finished difference Result 563 states and 1578 transitions. [2021-05-03 14:54:11,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:11,629 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 [2021-05-03 14:54:11,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:11,630 INFO L225 Difference]: With dead ends: 563 [2021-05-03 14:54:11,630 INFO L226 Difference]: Without dead ends: 544 [2021-05-03 14:54:11,630 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 142.4ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:54:11,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-05-03 14:54:11,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 278. [2021-05-03 14:54:11,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.963898916967509) internal successors, (821), 277 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:11,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 821 transitions. [2021-05-03 14:54:11,635 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 821 transitions. Word has length 18 [2021-05-03 14:54:11,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:11,635 INFO L480 AbstractCegarLoop]: Abstraction has 278 states and 821 transitions. [2021-05-03 14:54:11,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:11,635 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 821 transitions. [2021-05-03 14:54:11,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:11,636 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:11,636 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:11,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-05-03 14:54:11,849 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:11,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:11,849 INFO L82 PathProgramCache]: Analyzing trace with hash 241128271, now seen corresponding path program 8 times [2021-05-03 14:54:11,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:11,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295049647] [2021-05-03 14:54:11,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:11,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:11,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:11,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295049647] [2021-05-03 14:54:11,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598129699] [2021-05-03 14:54:11,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:11,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:54:11,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:11,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:11,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:11,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:11,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:11,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-03 14:54:11,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711976877] [2021-05-03 14:54:11,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:54:11,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:11,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:54:11,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:54:11,996 INFO L87 Difference]: Start difference. First operand 278 states and 821 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:12,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:12,146 INFO L93 Difference]: Finished difference Result 539 states and 1539 transitions. [2021-05-03 14:54:12,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:12,146 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:12,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:12,147 INFO L225 Difference]: With dead ends: 539 [2021-05-03 14:54:12,147 INFO L226 Difference]: Without dead ends: 520 [2021-05-03 14:54:12,147 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 117.0ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:54:12,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-05-03 14:54:12,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 282. [2021-05-03 14:54:12,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.99288256227758) internal successors, (841), 281 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:12,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 841 transitions. [2021-05-03 14:54:12,152 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 841 transitions. Word has length 18 [2021-05-03 14:54:12,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:12,152 INFO L480 AbstractCegarLoop]: Abstraction has 282 states and 841 transitions. [2021-05-03 14:54:12,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:12,152 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 841 transitions. [2021-05-03 14:54:12,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:12,153 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:12,153 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:12,368 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-05-03 14:54:12,369 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:12,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:12,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1457592117, now seen corresponding path program 9 times [2021-05-03 14:54:12,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:12,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352653062] [2021-05-03 14:54:12,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:12,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:12,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:12,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352653062] [2021-05-03 14:54:12,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917680923] [2021-05-03 14:54:12,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:12,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 14:54:12,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:12,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:12,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:12,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:12,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:12,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 14:54:12,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41594528] [2021-05-03 14:54:12,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:54:12,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:12,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:54:12,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:54:12,534 INFO L87 Difference]: Start difference. First operand 282 states and 841 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:12,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:12,667 INFO L93 Difference]: Finished difference Result 549 states and 1564 transitions. [2021-05-03 14:54:12,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:12,667 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:12,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:12,668 INFO L225 Difference]: With dead ends: 549 [2021-05-03 14:54:12,668 INFO L226 Difference]: Without dead ends: 530 [2021-05-03 14:54:12,668 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 138.8ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:54:12,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-05-03 14:54:12,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 271. [2021-05-03 14:54:12,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 2.937037037037037) internal successors, (793), 270 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:12,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 793 transitions. [2021-05-03 14:54:12,680 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 793 transitions. Word has length 18 [2021-05-03 14:54:12,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:12,680 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 793 transitions. [2021-05-03 14:54:12,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:12,681 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 793 transitions. [2021-05-03 14:54:12,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:12,681 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:12,681 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:12,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:12,897 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:12,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:12,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1254344866, now seen corresponding path program 2 times [2021-05-03 14:54:12,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:12,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538098999] [2021-05-03 14:54:12,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:12,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:12,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:12,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538098999] [2021-05-03 14:54:12,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:54:12,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:54:12,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968731741] [2021-05-03 14:54:12,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:54:12,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:12,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:54:12,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:54:12,943 INFO L87 Difference]: Start difference. First operand 271 states and 793 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) [2021-05-03 14:54:13,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:13,031 INFO L93 Difference]: Finished difference Result 528 states and 1474 transitions. [2021-05-03 14:54:13,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 14:54:13,031 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 [2021-05-03 14:54:13,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:13,032 INFO L225 Difference]: With dead ends: 528 [2021-05-03 14:54:13,032 INFO L226 Difference]: Without dead ends: 457 [2021-05-03 14:54:13,032 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 62.0ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:54:13,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-05-03 14:54:13,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 287. [2021-05-03 14:54:13,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 2.972027972027972) internal successors, (850), 286 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:13,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 850 transitions. [2021-05-03 14:54:13,037 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 850 transitions. Word has length 18 [2021-05-03 14:54:13,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:13,037 INFO L480 AbstractCegarLoop]: Abstraction has 287 states and 850 transitions. [2021-05-03 14:54:13,037 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) [2021-05-03 14:54:13,037 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 850 transitions. [2021-05-03 14:54:13,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:13,038 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:13,038 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:13,038 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2021-05-03 14:54:13,038 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:13,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:13,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1663824377, now seen corresponding path program 10 times [2021-05-03 14:54:13,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:13,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849766361] [2021-05-03 14:54:13,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:13,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:13,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:13,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849766361] [2021-05-03 14:54:13,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695268493] [2021-05-03 14:54:13,095 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:13,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:54:13,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:13,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:13,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:13,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:13,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:13,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-03 14:54:13,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082079744] [2021-05-03 14:54:13,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:54:13,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:13,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:54:13,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:54:13,235 INFO L87 Difference]: Start difference. First operand 287 states and 850 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:13,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:13,466 INFO L93 Difference]: Finished difference Result 473 states and 1329 transitions. [2021-05-03 14:54:13,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:13,466 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 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 [2021-05-03 14:54:13,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:13,467 INFO L225 Difference]: With dead ends: 473 [2021-05-03 14:54:13,467 INFO L226 Difference]: Without dead ends: 454 [2021-05-03 14:54:13,467 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 232.3ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:54:13,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-05-03 14:54:13,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 291. [2021-05-03 14:54:13,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.9655172413793105) internal successors, (860), 290 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:13,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 860 transitions. [2021-05-03 14:54:13,472 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 860 transitions. Word has length 18 [2021-05-03 14:54:13,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:13,472 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 860 transitions. [2021-05-03 14:54:13,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:13,472 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 860 transitions. [2021-05-03 14:54:13,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:13,472 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:13,472 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:13,687 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-05-03 14:54:13,688 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:13,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:13,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1866597709, now seen corresponding path program 11 times [2021-05-03 14:54:13,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:13,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346281553] [2021-05-03 14:54:13,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:13,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:13,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:13,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346281553] [2021-05-03 14:54:13,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921490863] [2021-05-03 14:54:13,744 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:13,768 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:54:13,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:13,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:13,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:13,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:13,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:13,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 14:54:13,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817426912] [2021-05-03 14:54:13,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:54:13,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:13,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:54:13,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:54:13,870 INFO L87 Difference]: Start difference. First operand 291 states and 860 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:14,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:14,108 INFO L93 Difference]: Finished difference Result 431 states and 1219 transitions. [2021-05-03 14:54:14,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:14,109 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:14,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:14,109 INFO L225 Difference]: With dead ends: 431 [2021-05-03 14:54:14,109 INFO L226 Difference]: Without dead ends: 408 [2021-05-03 14:54:14,110 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 248.1ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:54:14,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-05-03 14:54:14,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 299. [2021-05-03 14:54:14,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 2.966442953020134) internal successors, (884), 298 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:14,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 884 transitions. [2021-05-03 14:54:14,114 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 884 transitions. Word has length 18 [2021-05-03 14:54:14,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:14,114 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 884 transitions. [2021-05-03 14:54:14,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:14,114 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 884 transitions. [2021-05-03 14:54:14,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:14,114 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:14,114 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:14,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-05-03 14:54:14,325 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:14,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:14,325 INFO L82 PathProgramCache]: Analyzing trace with hash -752125083, now seen corresponding path program 2 times [2021-05-03 14:54:14,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:14,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513192914] [2021-05-03 14:54:14,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:14,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:14,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:14,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513192914] [2021-05-03 14:54:14,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673633671] [2021-05-03 14:54:14,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:54:14,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:54:14,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:14,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:14,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:14,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:14,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:14,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 14:54:14,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113674058] [2021-05-03 14:54:14,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:54:14,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:14,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:54:14,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:54:14,474 INFO L87 Difference]: Start difference. First operand 299 states and 884 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:14,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:14,623 INFO L93 Difference]: Finished difference Result 471 states and 1313 transitions. [2021-05-03 14:54:14,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:14,624 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:14,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:14,625 INFO L225 Difference]: With dead ends: 471 [2021-05-03 14:54:14,625 INFO L226 Difference]: Without dead ends: 449 [2021-05-03 14:54:14,625 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 134.5ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:54:14,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-05-03 14:54:14,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 301. [2021-05-03 14:54:14,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.97) internal successors, (891), 300 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:14,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 891 transitions. [2021-05-03 14:54:14,629 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 891 transitions. Word has length 18 [2021-05-03 14:54:14,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:14,629 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 891 transitions. [2021-05-03 14:54:14,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:14,630 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 891 transitions. [2021-05-03 14:54:14,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:14,630 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:14,631 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:14,846 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:14,847 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:14,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:14,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1213009967, now seen corresponding path program 12 times [2021-05-03 14:54:14,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:14,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977440959] [2021-05-03 14:54:14,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:14,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:14,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:14,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977440959] [2021-05-03 14:54:14,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128673806] [2021-05-03 14:54:14,900 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:54:14,936 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 14:54:14,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:14,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:14,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:15,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:15,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:15,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 14:54:15,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863368891] [2021-05-03 14:54:15,033 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:54:15,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:15,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:54:15,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:54:15,034 INFO L87 Difference]: Start difference. First operand 301 states and 891 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:15,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:15,281 INFO L93 Difference]: Finished difference Result 417 states and 1196 transitions. [2021-05-03 14:54:15,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:15,281 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:15,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:15,282 INFO L225 Difference]: With dead ends: 417 [2021-05-03 14:54:15,282 INFO L226 Difference]: Without dead ends: 398 [2021-05-03 14:54:15,282 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 233.9ms TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:54:15,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-05-03 14:54:15,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 295. [2021-05-03 14:54:15,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.9727891156462585) internal successors, (874), 294 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:15,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 874 transitions. [2021-05-03 14:54:15,286 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 874 transitions. Word has length 18 [2021-05-03 14:54:15,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:15,287 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 874 transitions. [2021-05-03 14:54:15,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:15,287 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 874 transitions. [2021-05-03 14:54:15,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:15,290 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:15,290 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:15,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-05-03 14:54:15,501 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:15,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:15,501 INFO L82 PathProgramCache]: Analyzing trace with hash 303490843, now seen corresponding path program 3 times [2021-05-03 14:54:15,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:15,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816161450] [2021-05-03 14:54:15,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:15,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:15,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:15,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816161450] [2021-05-03 14:54:15,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:54:15,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:54:15,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349130204] [2021-05-03 14:54:15,545 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:54:15,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:15,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:54:15,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:54:15,545 INFO L87 Difference]: Start difference. First operand 295 states and 874 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) [2021-05-03 14:54:15,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:15,715 INFO L93 Difference]: Finished difference Result 441 states and 1242 transitions. [2021-05-03 14:54:15,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:15,716 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 [2021-05-03 14:54:15,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:15,716 INFO L225 Difference]: With dead ends: 441 [2021-05-03 14:54:15,716 INFO L226 Difference]: Without dead ends: 412 [2021-05-03 14:54:15,717 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 134.9ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:54:15,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-05-03 14:54:15,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 295. [2021-05-03 14:54:15,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.9659863945578233) internal successors, (872), 294 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:15,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 872 transitions. [2021-05-03 14:54:15,721 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 872 transitions. Word has length 18 [2021-05-03 14:54:15,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:15,721 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 872 transitions. [2021-05-03 14:54:15,721 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) [2021-05-03 14:54:15,721 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 872 transitions. [2021-05-03 14:54:15,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:15,721 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:15,721 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:15,721 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2021-05-03 14:54:15,721 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:15,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:15,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1861527460, now seen corresponding path program 3 times [2021-05-03 14:54:15,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:15,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068925619] [2021-05-03 14:54:15,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:15,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:15,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:15,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068925619] [2021-05-03 14:54:15,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569405842] [2021-05-03 14:54:15,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:15,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 14:54:15,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:15,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:54:15,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:15,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:15,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:15,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-05-03 14:54:15,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934122495] [2021-05-03 14:54:15,868 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:54:15,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:15,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:54:15,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:54:15,868 INFO L87 Difference]: Start difference. First operand 295 states and 872 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:15,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:15,928 INFO L93 Difference]: Finished difference Result 458 states and 1290 transitions. [2021-05-03 14:54:15,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 14:54:15,928 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:15,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:15,929 INFO L225 Difference]: With dead ends: 458 [2021-05-03 14:54:15,929 INFO L226 Difference]: Without dead ends: 401 [2021-05-03 14:54:15,929 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 68.2ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:54:15,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-05-03 14:54:15,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 292. [2021-05-03 14:54:15,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.9690721649484537) internal successors, (864), 291 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:15,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 864 transitions. [2021-05-03 14:54:15,933 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 864 transitions. Word has length 18 [2021-05-03 14:54:15,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:15,933 INFO L480 AbstractCegarLoop]: Abstraction has 292 states and 864 transitions. [2021-05-03 14:54:15,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:15,933 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 864 transitions. [2021-05-03 14:54:15,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:15,934 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:15,934 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:16,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:16,149 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:16,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:16,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1997185865, now seen corresponding path program 13 times [2021-05-03 14:54:16,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:16,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093887194] [2021-05-03 14:54:16,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:16,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:16,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:16,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093887194] [2021-05-03 14:54:16,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560726442] [2021-05-03 14:54:16,203 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:54:16,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:16,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:16,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:16,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:16,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:16,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-05-03 14:54:16,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176692808] [2021-05-03 14:54:16,328 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:54:16,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:16,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:54:16,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:54:16,329 INFO L87 Difference]: Start difference. First operand 292 states and 864 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:16,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:16,522 INFO L93 Difference]: Finished difference Result 491 states and 1393 transitions. [2021-05-03 14:54:16,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:16,522 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:16,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:16,523 INFO L225 Difference]: With dead ends: 491 [2021-05-03 14:54:16,523 INFO L226 Difference]: Without dead ends: 472 [2021-05-03 14:54:16,523 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 179.6ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:54:16,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-05-03 14:54:16,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 298. [2021-05-03 14:54:16,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 3.0033670033670035) internal successors, (892), 297 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:16,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 892 transitions. [2021-05-03 14:54:16,527 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 892 transitions. Word has length 18 [2021-05-03 14:54:16,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:16,527 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 892 transitions. [2021-05-03 14:54:16,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:16,527 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 892 transitions. [2021-05-03 14:54:16,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:16,528 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:16,528 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:16,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:16,728 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:16,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:16,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1067024689, now seen corresponding path program 14 times [2021-05-03 14:54:16,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:16,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948706801] [2021-05-03 14:54:16,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:16,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:16,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:16,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948706801] [2021-05-03 14:54:16,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541332807] [2021-05-03 14:54:16,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:16,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:54:16,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:16,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:16,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:16,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:16,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:16,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 14:54:16,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707958506] [2021-05-03 14:54:16,907 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:54:16,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:16,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:54:16,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:54:16,908 INFO L87 Difference]: Start difference. First operand 298 states and 892 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:17,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:17,119 INFO L93 Difference]: Finished difference Result 479 states and 1353 transitions. [2021-05-03 14:54:17,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:17,120 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:17,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:17,121 INFO L225 Difference]: With dead ends: 479 [2021-05-03 14:54:17,121 INFO L226 Difference]: Without dead ends: 456 [2021-05-03 14:54:17,121 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 184.6ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:54:17,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-05-03 14:54:17,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 302. [2021-05-03 14:54:17,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.9833887043189367) internal successors, (898), 301 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:17,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 898 transitions. [2021-05-03 14:54:17,125 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 898 transitions. Word has length 18 [2021-05-03 14:54:17,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:17,125 INFO L480 AbstractCegarLoop]: Abstraction has 302 states and 898 transitions. [2021-05-03 14:54:17,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:17,125 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 898 transitions. [2021-05-03 14:54:17,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:17,125 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:17,126 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:17,330 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-05-03 14:54:17,330 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:17,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:17,331 INFO L82 PathProgramCache]: Analyzing trace with hash -435848983, now seen corresponding path program 4 times [2021-05-03 14:54:17,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:17,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356972109] [2021-05-03 14:54:17,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:17,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:17,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:17,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356972109] [2021-05-03 14:54:17,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525129245] [2021-05-03 14:54:17,361 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:17,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:54:17,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:17,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:54:17,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:17,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:17,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:17,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-05-03 14:54:17,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495343160] [2021-05-03 14:54:17,464 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:54:17,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:17,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:54:17,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:54:17,464 INFO L87 Difference]: Start difference. First operand 302 states and 898 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:17,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:17,518 INFO L93 Difference]: Finished difference Result 566 states and 1645 transitions. [2021-05-03 14:54:17,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 14:54:17,518 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:17,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:17,519 INFO L225 Difference]: With dead ends: 566 [2021-05-03 14:54:17,519 INFO L226 Difference]: Without dead ends: 517 [2021-05-03 14:54:17,519 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 52.5ms TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:54:17,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-05-03 14:54:17,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 311. [2021-05-03 14:54:17,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 3.041935483870968) internal successors, (943), 310 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:17,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 943 transitions. [2021-05-03 14:54:17,524 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 943 transitions. Word has length 18 [2021-05-03 14:54:17,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:17,524 INFO L480 AbstractCegarLoop]: Abstraction has 311 states and 943 transitions. [2021-05-03 14:54:17,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:17,524 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 943 transitions. [2021-05-03 14:54:17,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:17,525 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:17,525 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:17,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:17,725 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:17,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:17,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1726676173, now seen corresponding path program 15 times [2021-05-03 14:54:17,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:17,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208334227] [2021-05-03 14:54:17,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:17,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:17,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:17,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208334227] [2021-05-03 14:54:17,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106669007] [2021-05-03 14:54:17,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:17,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 14:54:17,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:17,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:17,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:17,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:17,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:17,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-03 14:54:17,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181370269] [2021-05-03 14:54:17,909 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:54:17,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:17,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:54:17,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:54:17,909 INFO L87 Difference]: Start difference. First operand 311 states and 943 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:18,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:18,139 INFO L93 Difference]: Finished difference Result 516 states and 1480 transitions. [2021-05-03 14:54:18,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:18,139 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:18,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:18,140 INFO L225 Difference]: With dead ends: 516 [2021-05-03 14:54:18,140 INFO L226 Difference]: Without dead ends: 497 [2021-05-03 14:54:18,140 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 206.0ms TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:54:18,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-05-03 14:54:18,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 308. [2021-05-03 14:54:18,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 3.0618892508143323) internal successors, (940), 307 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:18,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 940 transitions. [2021-05-03 14:54:18,145 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 940 transitions. Word has length 18 [2021-05-03 14:54:18,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:18,145 INFO L480 AbstractCegarLoop]: Abstraction has 308 states and 940 transitions. [2021-05-03 14:54:18,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:18,145 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 940 transitions. [2021-05-03 14:54:18,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:18,146 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:18,146 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:18,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-05-03 14:54:18,359 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:18,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:18,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1907804621, now seen corresponding path program 16 times [2021-05-03 14:54:18,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:18,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828103357] [2021-05-03 14:54:18,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:18,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:18,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:18,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828103357] [2021-05-03 14:54:18,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464362292] [2021-05-03 14:54:18,409 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:18,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:54:18,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:18,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:18,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:18,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:18,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:18,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 14:54:18,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191144669] [2021-05-03 14:54:18,524 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:54:18,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:18,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:54:18,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:54:18,525 INFO L87 Difference]: Start difference. First operand 308 states and 940 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:18,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:18,671 INFO L93 Difference]: Finished difference Result 497 states and 1451 transitions. [2021-05-03 14:54:18,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:18,672 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:18,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:18,672 INFO L225 Difference]: With dead ends: 497 [2021-05-03 14:54:18,672 INFO L226 Difference]: Without dead ends: 478 [2021-05-03 14:54:18,673 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 127.2ms TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:54:18,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-05-03 14:54:18,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 304. [2021-05-03 14:54:18,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.036303630363036) internal successors, (920), 303 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:18,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 920 transitions. [2021-05-03 14:54:18,677 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 920 transitions. Word has length 18 [2021-05-03 14:54:18,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:18,677 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 920 transitions. [2021-05-03 14:54:18,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:18,678 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 920 transitions. [2021-05-03 14:54:18,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:18,678 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:18,678 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:18,894 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:18,894 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:18,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:18,894 INFO L82 PathProgramCache]: Analyzing trace with hash 398774047, now seen corresponding path program 5 times [2021-05-03 14:54:18,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:18,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235166707] [2021-05-03 14:54:18,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:18,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:18,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:18,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235166707] [2021-05-03 14:54:18,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:54:18,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:54:18,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383918426] [2021-05-03 14:54:18,939 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:54:18,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:18,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:54:18,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:54:18,940 INFO L87 Difference]: Start difference. First operand 304 states and 920 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) [2021-05-03 14:54:19,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:19,007 INFO L93 Difference]: Finished difference Result 514 states and 1465 transitions. [2021-05-03 14:54:19,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 14:54:19,007 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 [2021-05-03 14:54:19,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:19,008 INFO L225 Difference]: With dead ends: 514 [2021-05-03 14:54:19,008 INFO L226 Difference]: Without dead ends: 452 [2021-05-03 14:54:19,008 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 59.6ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:54:19,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-05-03 14:54:19,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 296. [2021-05-03 14:54:19,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 3.013559322033898) internal successors, (889), 295 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:19,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 889 transitions. [2021-05-03 14:54:19,013 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 889 transitions. Word has length 18 [2021-05-03 14:54:19,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:19,013 INFO L480 AbstractCegarLoop]: Abstraction has 296 states and 889 transitions. [2021-05-03 14:54:19,013 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) [2021-05-03 14:54:19,013 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 889 transitions. [2021-05-03 14:54:19,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:19,013 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:19,014 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:19,014 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2021-05-03 14:54:19,014 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:19,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:19,014 INFO L82 PathProgramCache]: Analyzing trace with hash 505869899, now seen corresponding path program 17 times [2021-05-03 14:54:19,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:19,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17288843] [2021-05-03 14:54:19,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:19,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:19,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:19,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17288843] [2021-05-03 14:54:19,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691707492] [2021-05-03 14:54:19,061 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:19,094 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:54:19,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:19,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:19,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:19,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:19,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:19,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 14:54:19,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612446123] [2021-05-03 14:54:19,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:54:19,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:19,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:54:19,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:54:19,198 INFO L87 Difference]: Start difference. First operand 296 states and 889 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:19,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:19,421 INFO L93 Difference]: Finished difference Result 450 states and 1288 transitions. [2021-05-03 14:54:19,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:19,422 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:19,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:19,422 INFO L225 Difference]: With dead ends: 450 [2021-05-03 14:54:19,422 INFO L226 Difference]: Without dead ends: 427 [2021-05-03 14:54:19,422 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 212.5ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:54:19,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-05-03 14:54:19,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 304. [2021-05-03 14:54:19,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.0066006600660065) internal successors, (911), 303 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:19,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 911 transitions. [2021-05-03 14:54:19,426 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 911 transitions. Word has length 18 [2021-05-03 14:54:19,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:19,427 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 911 transitions. [2021-05-03 14:54:19,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:19,427 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 911 transitions. [2021-05-03 14:54:19,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:19,427 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:19,427 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:19,627 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:19,628 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:19,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:19,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1484427343, now seen corresponding path program 18 times [2021-05-03 14:54:19,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:19,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293579483] [2021-05-03 14:54:19,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:19,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:19,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:19,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293579483] [2021-05-03 14:54:19,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776578641] [2021-05-03 14:54:19,678 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:19,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 14:54:19,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:19,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:19,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:19,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:19,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:19,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 14:54:19,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811299604] [2021-05-03 14:54:19,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:54:19,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:19,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:54:19,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:54:19,794 INFO L87 Difference]: Start difference. First operand 304 states and 911 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:20,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:20,001 INFO L93 Difference]: Finished difference Result 434 states and 1258 transitions. [2021-05-03 14:54:20,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:20,002 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:20,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:20,003 INFO L225 Difference]: With dead ends: 434 [2021-05-03 14:54:20,003 INFO L226 Difference]: Without dead ends: 415 [2021-05-03 14:54:20,003 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 187.1ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:54:20,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-05-03 14:54:20,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 296. [2021-05-03 14:54:20,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 3.013559322033898) internal successors, (889), 295 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:20,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 889 transitions. [2021-05-03 14:54:20,007 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 889 transitions. Word has length 18 [2021-05-03 14:54:20,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:20,007 INFO L480 AbstractCegarLoop]: Abstraction has 296 states and 889 transitions. [2021-05-03 14:54:20,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:20,007 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 889 transitions. [2021-05-03 14:54:20,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:20,007 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:20,007 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:20,208 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-05-03 14:54:20,208 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:20,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:20,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1410127391, now seen corresponding path program 19 times [2021-05-03 14:54:20,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:20,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246441264] [2021-05-03 14:54:20,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:20,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:20,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:20,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246441264] [2021-05-03 14:54:20,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289798016] [2021-05-03 14:54:20,270 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:20,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:20,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:20,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:20,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:20,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:20,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-03 14:54:20,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024419913] [2021-05-03 14:54:20,386 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:54:20,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:20,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:54:20,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:54:20,387 INFO L87 Difference]: Start difference. First operand 296 states and 889 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:20,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:20,624 INFO L93 Difference]: Finished difference Result 468 states and 1339 transitions. [2021-05-03 14:54:20,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:20,625 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:20,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:20,625 INFO L225 Difference]: With dead ends: 468 [2021-05-03 14:54:20,625 INFO L226 Difference]: Without dead ends: 449 [2021-05-03 14:54:20,625 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 223.0ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:54:20,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-05-03 14:54:20,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 302. [2021-05-03 14:54:20,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.0232558139534884) internal successors, (910), 301 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:20,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 910 transitions. [2021-05-03 14:54:20,629 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 910 transitions. Word has length 18 [2021-05-03 14:54:20,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:20,629 INFO L480 AbstractCegarLoop]: Abstraction has 302 states and 910 transitions. [2021-05-03 14:54:20,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:20,629 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 910 transitions. [2021-05-03 14:54:20,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:20,630 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:20,630 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:20,833 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:20,834 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:20,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:20,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1565959223, now seen corresponding path program 20 times [2021-05-03 14:54:20,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:20,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99548008] [2021-05-03 14:54:20,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:20,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:20,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:20,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99548008] [2021-05-03 14:54:20,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916780869] [2021-05-03 14:54:20,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:20,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:54:20,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:20,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:20,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:21,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:21,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:21,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-03 14:54:21,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212963342] [2021-05-03 14:54:21,035 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:54:21,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:21,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:54:21,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:54:21,036 INFO L87 Difference]: Start difference. First operand 302 states and 910 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:21,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:21,274 INFO L93 Difference]: Finished difference Result 479 states and 1352 transitions. [2021-05-03 14:54:21,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:21,274 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:21,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:21,275 INFO L225 Difference]: With dead ends: 479 [2021-05-03 14:54:21,275 INFO L226 Difference]: Without dead ends: 460 [2021-05-03 14:54:21,275 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 255.0ms TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:54:21,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-05-03 14:54:21,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 306. [2021-05-03 14:54:21,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.036065573770492) internal successors, (926), 305 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:21,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 926 transitions. [2021-05-03 14:54:21,279 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 926 transitions. Word has length 18 [2021-05-03 14:54:21,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:21,279 INFO L480 AbstractCegarLoop]: Abstraction has 306 states and 926 transitions. [2021-05-03 14:54:21,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:21,279 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 926 transitions. [2021-05-03 14:54:21,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:21,280 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:21,280 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:21,480 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:21,480 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:21,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:21,481 INFO L82 PathProgramCache]: Analyzing trace with hash -635798047, now seen corresponding path program 21 times [2021-05-03 14:54:21,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:21,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830482957] [2021-05-03 14:54:21,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:21,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:21,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:21,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830482957] [2021-05-03 14:54:21,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613932974] [2021-05-03 14:54:21,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:21,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 14:54:21,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:21,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:21,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:21,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:21,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:21,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 14:54:21,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959734597] [2021-05-03 14:54:21,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:54:21,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:21,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:54:21,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:54:21,662 INFO L87 Difference]: Start difference. First operand 306 states and 926 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:21,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:21,890 INFO L93 Difference]: Finished difference Result 442 states and 1266 transitions. [2021-05-03 14:54:21,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:21,891 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:21,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:21,891 INFO L225 Difference]: With dead ends: 442 [2021-05-03 14:54:21,891 INFO L226 Difference]: Without dead ends: 419 [2021-05-03 14:54:21,892 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 242.7ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:54:21,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-05-03 14:54:21,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 308. [2021-05-03 14:54:21,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 3.019543973941368) internal successors, (927), 307 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:21,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 927 transitions. [2021-05-03 14:54:21,895 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 927 transitions. Word has length 18 [2021-05-03 14:54:21,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:21,896 INFO L480 AbstractCegarLoop]: Abstraction has 308 states and 927 transitions. [2021-05-03 14:54:21,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:21,896 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 927 transitions. [2021-05-03 14:54:21,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:21,896 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:21,896 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:22,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:22,097 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:22,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:22,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1614261531, now seen corresponding path program 22 times [2021-05-03 14:54:22,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:22,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216423870] [2021-05-03 14:54:22,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:22,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:22,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:22,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216423870] [2021-05-03 14:54:22,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942632304] [2021-05-03 14:54:22,165 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:22,186 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:54:22,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:22,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:22,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:22,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:22,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:22,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-03 14:54:22,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967688721] [2021-05-03 14:54:22,280 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:54:22,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:22,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:54:22,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:54:22,281 INFO L87 Difference]: Start difference. First operand 308 states and 927 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:22,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:22,457 INFO L93 Difference]: Finished difference Result 535 states and 1530 transitions. [2021-05-03 14:54:22,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:22,457 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:22,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:22,458 INFO L225 Difference]: With dead ends: 535 [2021-05-03 14:54:22,458 INFO L226 Difference]: Without dead ends: 516 [2021-05-03 14:54:22,458 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 173.6ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:54:22,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-05-03 14:54:22,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 303. [2021-05-03 14:54:22,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 3.0264900662251657) internal successors, (914), 302 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:22,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 914 transitions. [2021-05-03 14:54:22,462 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 914 transitions. Word has length 18 [2021-05-03 14:54:22,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:22,462 INFO L480 AbstractCegarLoop]: Abstraction has 303 states and 914 transitions. [2021-05-03 14:54:22,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:22,463 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 914 transitions. [2021-05-03 14:54:22,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:22,463 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:22,463 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:22,663 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2021-05-03 14:54:22,664 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:22,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:22,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1839327131, now seen corresponding path program 23 times [2021-05-03 14:54:22,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:22,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030633040] [2021-05-03 14:54:22,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:22,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:22,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:22,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030633040] [2021-05-03 14:54:22,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790907155] [2021-05-03 14:54:22,716 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:22,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:54:22,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:22,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:22,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:22,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:22,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:22,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 14:54:22,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011611414] [2021-05-03 14:54:22,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:54:22,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:22,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:54:22,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:54:22,830 INFO L87 Difference]: Start difference. First operand 303 states and 914 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:23,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:23,013 INFO L93 Difference]: Finished difference Result 537 states and 1559 transitions. [2021-05-03 14:54:23,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:23,014 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:23,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:23,015 INFO L225 Difference]: With dead ends: 537 [2021-05-03 14:54:23,015 INFO L226 Difference]: Without dead ends: 518 [2021-05-03 14:54:23,015 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 144.1ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:54:23,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-05-03 14:54:23,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 307. [2021-05-03 14:54:23,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 3.052287581699346) internal successors, (934), 306 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:23,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 934 transitions. [2021-05-03 14:54:23,019 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 934 transitions. Word has length 18 [2021-05-03 14:54:23,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:23,020 INFO L480 AbstractCegarLoop]: Abstraction has 307 states and 934 transitions. [2021-05-03 14:54:23,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:23,020 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 934 transitions. [2021-05-03 14:54:23,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:23,020 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:23,020 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:23,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:23,221 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:23,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:23,221 INFO L82 PathProgramCache]: Analyzing trace with hash 756919777, now seen corresponding path program 24 times [2021-05-03 14:54:23,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:23,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883066623] [2021-05-03 14:54:23,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:23,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:23,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:23,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883066623] [2021-05-03 14:54:23,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120051701] [2021-05-03 14:54:23,267 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:23,305 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 14:54:23,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:23,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:23,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:23,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:23,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:23,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-03 14:54:23,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754843707] [2021-05-03 14:54:23,365 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:54:23,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:23,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:54:23,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:54:23,365 INFO L87 Difference]: Start difference. First operand 307 states and 934 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:23,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:23,512 INFO L93 Difference]: Finished difference Result 500 states and 1473 transitions. [2021-05-03 14:54:23,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:23,513 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:23,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:23,513 INFO L225 Difference]: With dead ends: 500 [2021-05-03 14:54:23,513 INFO L226 Difference]: Without dead ends: 481 [2021-05-03 14:54:23,514 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 120.5ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:54:23,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-05-03 14:54:23,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 299. [2021-05-03 14:54:23,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.0134228187919465) internal successors, (898), 298 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:23,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 898 transitions. [2021-05-03 14:54:23,518 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 898 transitions. Word has length 18 [2021-05-03 14:54:23,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:23,518 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 898 transitions. [2021-05-03 14:54:23,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:23,518 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 898 transitions. [2021-05-03 14:54:23,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:23,519 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:23,519 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:23,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-05-03 14:54:23,725 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:23,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:23,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1237003341, now seen corresponding path program 25 times [2021-05-03 14:54:23,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:23,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972371987] [2021-05-03 14:54:23,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:23,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:23,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:23,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972371987] [2021-05-03 14:54:23,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976053205] [2021-05-03 14:54:23,789 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:23,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:23,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:23,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:23,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:23,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:23,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-03 14:54:23,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956651208] [2021-05-03 14:54:23,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:54:23,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:23,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:54:23,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:54:23,905 INFO L87 Difference]: Start difference. First operand 299 states and 898 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:24,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:24,091 INFO L93 Difference]: Finished difference Result 506 states and 1446 transitions. [2021-05-03 14:54:24,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:24,091 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:24,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:24,092 INFO L225 Difference]: With dead ends: 506 [2021-05-03 14:54:24,092 INFO L226 Difference]: Without dead ends: 487 [2021-05-03 14:54:24,092 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 197.1ms TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:54:24,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-05-03 14:54:24,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 305. [2021-05-03 14:54:24,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 3.0427631578947367) internal successors, (925), 304 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:24,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 925 transitions. [2021-05-03 14:54:24,097 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 925 transitions. Word has length 18 [2021-05-03 14:54:24,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:24,097 INFO L480 AbstractCegarLoop]: Abstraction has 305 states and 925 transitions. [2021-05-03 14:54:24,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:24,097 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 925 transitions. [2021-05-03 14:54:24,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:24,097 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:24,097 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:24,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-05-03 14:54:24,312 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:24,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:24,313 INFO L82 PathProgramCache]: Analyzing trace with hash -2127802779, now seen corresponding path program 26 times [2021-05-03 14:54:24,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:24,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076429033] [2021-05-03 14:54:24,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:24,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:24,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:24,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076429033] [2021-05-03 14:54:24,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545824093] [2021-05-03 14:54:24,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:24,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:54:24,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:24,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:24,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:24,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:24,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:24,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 14:54:24,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201492784] [2021-05-03 14:54:24,496 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:54:24,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:24,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:54:24,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:54:24,496 INFO L87 Difference]: Start difference. First operand 305 states and 925 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:24,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:24,665 INFO L93 Difference]: Finished difference Result 494 states and 1406 transitions. [2021-05-03 14:54:24,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:24,665 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:24,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:24,666 INFO L225 Difference]: With dead ends: 494 [2021-05-03 14:54:24,666 INFO L226 Difference]: Without dead ends: 471 [2021-05-03 14:54:24,666 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 181.1ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:54:24,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-05-03 14:54:24,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 307. [2021-05-03 14:54:24,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 3.026143790849673) internal successors, (926), 306 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:24,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 926 transitions. [2021-05-03 14:54:24,671 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 926 transitions. Word has length 18 [2021-05-03 14:54:24,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:24,671 INFO L480 AbstractCegarLoop]: Abstraction has 307 states and 926 transitions. [2021-05-03 14:54:24,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:24,671 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 926 transitions. [2021-05-03 14:54:24,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:24,671 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:24,671 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:24,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-05-03 14:54:24,872 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:24,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:24,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1507513033, now seen corresponding path program 27 times [2021-05-03 14:54:24,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:24,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739646205] [2021-05-03 14:54:24,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:24,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:24,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:24,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739646205] [2021-05-03 14:54:24,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916107772] [2021-05-03 14:54:24,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:24,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 14:54:24,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:24,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:24,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:25,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:25,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:25,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-03 14:54:25,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490148475] [2021-05-03 14:54:25,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:54:25,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:25,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:54:25,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:54:25,060 INFO L87 Difference]: Start difference. First operand 307 states and 926 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:25,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:25,296 INFO L93 Difference]: Finished difference Result 509 states and 1449 transitions. [2021-05-03 14:54:25,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:25,297 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:25,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:25,298 INFO L225 Difference]: With dead ends: 509 [2021-05-03 14:54:25,298 INFO L226 Difference]: Without dead ends: 490 [2021-05-03 14:54:25,298 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 213.8ms TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:54:25,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-05-03 14:54:25,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 304. [2021-05-03 14:54:25,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.046204620462046) internal successors, (923), 303 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:25,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 923 transitions. [2021-05-03 14:54:25,303 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 923 transitions. Word has length 18 [2021-05-03 14:54:25,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:25,303 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 923 transitions. [2021-05-03 14:54:25,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:25,303 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 923 transitions. [2021-05-03 14:54:25,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:25,303 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:25,303 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:25,516 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:25,517 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:25,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:25,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1326384585, now seen corresponding path program 28 times [2021-05-03 14:54:25,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:25,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984499239] [2021-05-03 14:54:25,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:25,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:25,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:25,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984499239] [2021-05-03 14:54:25,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026817496] [2021-05-03 14:54:25,584 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:54:25,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:54:25,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:25,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:25,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:25,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:25,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:25,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 14:54:25,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474853960] [2021-05-03 14:54:25,682 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:54:25,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:25,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:54:25,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:54:25,683 INFO L87 Difference]: Start difference. First operand 304 states and 923 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:25,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:25,810 INFO L93 Difference]: Finished difference Result 490 states and 1420 transitions. [2021-05-03 14:54:25,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:25,810 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:25,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:25,811 INFO L225 Difference]: With dead ends: 490 [2021-05-03 14:54:25,811 INFO L226 Difference]: Without dead ends: 471 [2021-05-03 14:54:25,811 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 123.4ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:54:25,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-05-03 14:54:25,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 300. [2021-05-03 14:54:25,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 3.020066889632107) internal successors, (903), 299 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:25,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 903 transitions. [2021-05-03 14:54:25,815 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 903 transitions. Word has length 18 [2021-05-03 14:54:25,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:25,815 INFO L480 AbstractCegarLoop]: Abstraction has 300 states and 903 transitions. [2021-05-03 14:54:25,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:25,816 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 903 transitions. [2021-05-03 14:54:25,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:25,816 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:25,816 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:26,017 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-05-03 14:54:26,017 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:26,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:26,017 INFO L82 PathProgramCache]: Analyzing trace with hash -554908191, now seen corresponding path program 29 times [2021-05-03 14:54:26,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:26,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498472153] [2021-05-03 14:54:26,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:26,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:26,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:26,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498472153] [2021-05-03 14:54:26,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637163033] [2021-05-03 14:54:26,068 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:54:26,099 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:54:26,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:26,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:26,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:26,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:26,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:26,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 14:54:26,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594230478] [2021-05-03 14:54:26,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:54:26,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:26,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:54:26,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:54:26,181 INFO L87 Difference]: Start difference. First operand 300 states and 903 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:26,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:26,419 INFO L93 Difference]: Finished difference Result 447 states and 1285 transitions. [2021-05-03 14:54:26,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:26,419 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:26,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:26,420 INFO L225 Difference]: With dead ends: 447 [2021-05-03 14:54:26,420 INFO L226 Difference]: Without dead ends: 424 [2021-05-03 14:54:26,420 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 197.7ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:54:26,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-05-03 14:54:26,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 308. [2021-05-03 14:54:26,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 3.013029315960912) internal successors, (925), 307 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:26,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 925 transitions. [2021-05-03 14:54:26,424 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 925 transitions. Word has length 18 [2021-05-03 14:54:26,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:26,425 INFO L480 AbstractCegarLoop]: Abstraction has 308 states and 925 transitions. [2021-05-03 14:54:26,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:26,425 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 925 transitions. [2021-05-03 14:54:26,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:26,425 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:26,425 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:26,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-05-03 14:54:26,633 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:26,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:26,633 INFO L82 PathProgramCache]: Analyzing trace with hash 423649253, now seen corresponding path program 30 times [2021-05-03 14:54:26,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:26,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248497612] [2021-05-03 14:54:26,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:26,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:26,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:26,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248497612] [2021-05-03 14:54:26,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876685835] [2021-05-03 14:54:26,682 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:26,703 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 14:54:26,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:26,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:26,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:26,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:26,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:26,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 14:54:26,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512043336] [2021-05-03 14:54:26,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:54:26,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:26,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:54:26,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:54:26,786 INFO L87 Difference]: Start difference. First operand 308 states and 925 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:26,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:26,982 INFO L93 Difference]: Finished difference Result 431 states and 1255 transitions. [2021-05-03 14:54:26,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:26,982 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:26,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:26,983 INFO L225 Difference]: With dead ends: 431 [2021-05-03 14:54:26,983 INFO L226 Difference]: Without dead ends: 412 [2021-05-03 14:54:26,983 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 179.1ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:54:26,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-05-03 14:54:26,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 299. [2021-05-03 14:54:26,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.0134228187919465) internal successors, (898), 298 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:26,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 898 transitions. [2021-05-03 14:54:26,987 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 898 transitions. Word has length 18 [2021-05-03 14:54:26,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:26,987 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 898 transitions. [2021-05-03 14:54:26,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:26,987 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 898 transitions. [2021-05-03 14:54:26,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:26,987 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:26,987 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:27,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-05-03 14:54:27,188 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:27,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:27,188 INFO L82 PathProgramCache]: Analyzing trace with hash 427729059, now seen corresponding path program 31 times [2021-05-03 14:54:27,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:27,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206147905] [2021-05-03 14:54:27,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:27,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:27,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:27,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206147905] [2021-05-03 14:54:27,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520461481] [2021-05-03 14:54:27,235 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:27,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:27,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:27,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:27,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:27,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:27,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 14:54:27,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846198427] [2021-05-03 14:54:27,358 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:54:27,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:27,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:54:27,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:54:27,359 INFO L87 Difference]: Start difference. First operand 299 states and 898 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:27,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:27,517 INFO L93 Difference]: Finished difference Result 569 states and 1629 transitions. [2021-05-03 14:54:27,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:27,518 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 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 [2021-05-03 14:54:27,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:27,519 INFO L225 Difference]: With dead ends: 569 [2021-05-03 14:54:27,519 INFO L226 Difference]: Without dead ends: 550 [2021-05-03 14:54:27,519 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 140.0ms TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:54:27,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-05-03 14:54:27,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 306. [2021-05-03 14:54:27,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.036065573770492) internal successors, (926), 305 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:27,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 926 transitions. [2021-05-03 14:54:27,524 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 926 transitions. Word has length 18 [2021-05-03 14:54:27,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:27,524 INFO L480 AbstractCegarLoop]: Abstraction has 306 states and 926 transitions. [2021-05-03 14:54:27,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:27,524 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 926 transitions. [2021-05-03 14:54:27,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:27,524 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:27,524 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:27,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-05-03 14:54:27,725 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:27,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:27,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1635282131, now seen corresponding path program 32 times [2021-05-03 14:54:27,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:27,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100724291] [2021-05-03 14:54:27,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:27,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:27,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:27,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100724291] [2021-05-03 14:54:27,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631507298] [2021-05-03 14:54:27,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:27,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:54:27,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:27,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:27,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:27,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:27,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:27,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-03 14:54:27,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283731996] [2021-05-03 14:54:27,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:54:27,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:27,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:54:27,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:54:27,870 INFO L87 Difference]: Start difference. First operand 306 states and 926 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:27,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:27,996 INFO L93 Difference]: Finished difference Result 581 states and 1668 transitions. [2021-05-03 14:54:27,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:27,997 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:27,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:27,998 INFO L225 Difference]: With dead ends: 581 [2021-05-03 14:54:27,998 INFO L226 Difference]: Without dead ends: 562 [2021-05-03 14:54:27,998 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 109.0ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:54:27,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-05-03 14:54:28,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 310. [2021-05-03 14:54:28,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 3.0614886731391584) internal successors, (946), 309 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:28,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 946 transitions. [2021-05-03 14:54:28,012 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 946 transitions. Word has length 18 [2021-05-03 14:54:28,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:28,012 INFO L480 AbstractCegarLoop]: Abstraction has 310 states and 946 transitions. [2021-05-03 14:54:28,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:28,012 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 946 transitions. [2021-05-03 14:54:28,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:28,012 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:28,012 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:28,213 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:28,213 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:28,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:28,213 INFO L82 PathProgramCache]: Analyzing trace with hash -63438257, now seen corresponding path program 33 times [2021-05-03 14:54:28,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:28,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013444686] [2021-05-03 14:54:28,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:28,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:28,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:28,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013444686] [2021-05-03 14:54:28,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165172457] [2021-05-03 14:54:28,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:28,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 14:54:28,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:28,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:28,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:28,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:28,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:28,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 14:54:28,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862942966] [2021-05-03 14:54:28,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:54:28,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:28,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:54:28,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:54:28,378 INFO L87 Difference]: Start difference. First operand 310 states and 946 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:28,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:28,537 INFO L93 Difference]: Finished difference Result 590 states and 1691 transitions. [2021-05-03 14:54:28,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:28,537 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:28,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:28,538 INFO L225 Difference]: With dead ends: 590 [2021-05-03 14:54:28,538 INFO L226 Difference]: Without dead ends: 571 [2021-05-03 14:54:28,538 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 149.6ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:54:28,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-05-03 14:54:28,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 299. [2021-05-03 14:54:28,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.0134228187919465) internal successors, (898), 298 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:28,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 898 transitions. [2021-05-03 14:54:28,544 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 898 transitions. Word has length 18 [2021-05-03 14:54:28,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:28,544 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 898 transitions. [2021-05-03 14:54:28,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:28,544 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 898 transitions. [2021-05-03 14:54:28,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:28,544 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:28,544 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:28,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:28,753 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:28,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:28,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1646468570, now seen corresponding path program 4 times [2021-05-03 14:54:28,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:28,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372568389] [2021-05-03 14:54:28,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:28,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:28,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:28,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372568389] [2021-05-03 14:54:28,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:54:28,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:54:28,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789122911] [2021-05-03 14:54:28,794 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:54:28,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:28,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:54:28,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:54:28,794 INFO L87 Difference]: Start difference. First operand 299 states and 898 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) [2021-05-03 14:54:28,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:28,857 INFO L93 Difference]: Finished difference Result 429 states and 1249 transitions. [2021-05-03 14:54:28,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 14:54:28,857 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 [2021-05-03 14:54:28,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:28,858 INFO L225 Difference]: With dead ends: 429 [2021-05-03 14:54:28,858 INFO L226 Difference]: Without dead ends: 358 [2021-05-03 14:54:28,858 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 55.4ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:54:28,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-05-03 14:54:28,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 294. [2021-05-03 14:54:28,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 3.0) internal successors, (879), 293 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:28,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 879 transitions. [2021-05-03 14:54:28,861 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 879 transitions. Word has length 18 [2021-05-03 14:54:28,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:28,861 INFO L480 AbstractCegarLoop]: Abstraction has 294 states and 879 transitions. [2021-05-03 14:54:28,862 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) [2021-05-03 14:54:28,862 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 879 transitions. [2021-05-03 14:54:28,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:28,862 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:28,862 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:28,862 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable234 [2021-05-03 14:54:28,862 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:28,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:28,862 INFO L82 PathProgramCache]: Analyzing trace with hash -269670517, now seen corresponding path program 34 times [2021-05-03 14:54:28,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:28,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832813196] [2021-05-03 14:54:28,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:28,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:28,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:28,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832813196] [2021-05-03 14:54:28,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097290853] [2021-05-03 14:54:28,922 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:28,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:54:28,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:28,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:28,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:29,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:29,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:29,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-03 14:54:29,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385199168] [2021-05-03 14:54:29,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:54:29,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:29,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:54:29,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:54:29,030 INFO L87 Difference]: Start difference. First operand 294 states and 879 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:29,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:29,246 INFO L93 Difference]: Finished difference Result 648 states and 1820 transitions. [2021-05-03 14:54:29,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:29,247 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 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 [2021-05-03 14:54:29,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:29,247 INFO L225 Difference]: With dead ends: 648 [2021-05-03 14:54:29,248 INFO L226 Difference]: Without dead ends: 629 [2021-05-03 14:54:29,248 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 211.0ms TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:54:29,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-05-03 14:54:29,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 298. [2021-05-03 14:54:29,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.993265993265993) internal successors, (889), 297 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:29,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 889 transitions. [2021-05-03 14:54:29,252 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 889 transitions. Word has length 18 [2021-05-03 14:54:29,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:29,252 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 889 transitions. [2021-05-03 14:54:29,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:29,252 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 889 transitions. [2021-05-03 14:54:29,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:29,252 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:29,252 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:29,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-05-03 14:54:29,453 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:29,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:29,453 INFO L82 PathProgramCache]: Analyzing trace with hash -472443849, now seen corresponding path program 35 times [2021-05-03 14:54:29,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:29,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623478763] [2021-05-03 14:54:29,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:29,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:29,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:29,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623478763] [2021-05-03 14:54:29,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294721362] [2021-05-03 14:54:29,505 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:29,529 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:54:29,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:29,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:29,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:29,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:29,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:29,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 14:54:29,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401687899] [2021-05-03 14:54:29,631 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:54:29,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:29,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:54:29,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:54:29,631 INFO L87 Difference]: Start difference. First operand 298 states and 889 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:29,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:29,874 INFO L93 Difference]: Finished difference Result 606 states and 1708 transitions. [2021-05-03 14:54:29,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:29,874 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:29,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:29,875 INFO L225 Difference]: With dead ends: 606 [2021-05-03 14:54:29,875 INFO L226 Difference]: Without dead ends: 583 [2021-05-03 14:54:29,875 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 236.2ms TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:54:29,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-05-03 14:54:29,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 306. [2021-05-03 14:54:29,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.9868852459016395) internal successors, (911), 305 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:29,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 911 transitions. [2021-05-03 14:54:29,880 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 911 transitions. Word has length 18 [2021-05-03 14:54:29,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:29,880 INFO L480 AbstractCegarLoop]: Abstraction has 306 states and 911 transitions. [2021-05-03 14:54:29,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:29,880 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 911 transitions. [2021-05-03 14:54:29,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:29,880 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:29,880 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:30,081 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-05-03 14:54:30,081 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:30,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:30,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1687803469, now seen corresponding path program 36 times [2021-05-03 14:54:30,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:30,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896518646] [2021-05-03 14:54:30,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:30,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:30,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:30,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896518646] [2021-05-03 14:54:30,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056687142] [2021-05-03 14:54:30,136 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:30,158 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 14:54:30,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:30,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:30,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:30,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:30,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:30,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 14:54:30,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310909971] [2021-05-03 14:54:30,248 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:54:30,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:30,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:54:30,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:54:30,249 INFO L87 Difference]: Start difference. First operand 306 states and 911 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:30,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:30,495 INFO L93 Difference]: Finished difference Result 590 states and 1678 transitions. [2021-05-03 14:54:30,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:30,496 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:30,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:30,496 INFO L225 Difference]: With dead ends: 590 [2021-05-03 14:54:30,497 INFO L226 Difference]: Without dead ends: 571 [2021-05-03 14:54:30,497 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 219.4ms TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:54:30,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-05-03 14:54:30,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 294. [2021-05-03 14:54:30,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 3.0) internal successors, (879), 293 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:30,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 879 transitions. [2021-05-03 14:54:30,501 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 879 transitions. Word has length 18 [2021-05-03 14:54:30,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:30,501 INFO L480 AbstractCegarLoop]: Abstraction has 294 states and 879 transitions. [2021-05-03 14:54:30,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:30,501 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 879 transitions. [2021-05-03 14:54:30,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:30,501 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:30,502 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:30,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-05-03 14:54:30,713 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:30,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:30,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1039285976, now seen corresponding path program 5 times [2021-05-03 14:54:30,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:30,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320560677] [2021-05-03 14:54:30,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:30,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:30,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:30,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320560677] [2021-05-03 14:54:30,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002924163] [2021-05-03 14:54:30,743 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:30,764 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:54:30,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:30,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:54:30,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:30,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:30,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:30,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-05-03 14:54:30,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018660471] [2021-05-03 14:54:30,818 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:54:30,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:30,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:54:30,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:54:30,818 INFO L87 Difference]: Start difference. First operand 294 states and 879 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:30,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:30,890 INFO L93 Difference]: Finished difference Result 448 states and 1287 transitions. [2021-05-03 14:54:30,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 14:54:30,890 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:30,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:30,891 INFO L225 Difference]: With dead ends: 448 [2021-05-03 14:54:30,891 INFO L226 Difference]: Without dead ends: 391 [2021-05-03 14:54:30,891 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 65.3ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:54:30,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-05-03 14:54:30,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 287. [2021-05-03 14:54:30,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 2.958041958041958) internal successors, (846), 286 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:30,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 846 transitions. [2021-05-03 14:54:30,895 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 846 transitions. Word has length 18 [2021-05-03 14:54:30,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:30,895 INFO L480 AbstractCegarLoop]: Abstraction has 287 states and 846 transitions. [2021-05-03 14:54:30,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:30,895 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 846 transitions. [2021-05-03 14:54:30,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:30,895 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:30,895 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:31,095 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-05-03 14:54:31,096 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:31,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:31,096 INFO L82 PathProgramCache]: Analyzing trace with hash -603032005, now seen corresponding path program 37 times [2021-05-03 14:54:31,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:31,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383458594] [2021-05-03 14:54:31,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:31,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:31,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:31,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383458594] [2021-05-03 14:54:31,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257092746] [2021-05-03 14:54:31,154 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:31,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:31,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:31,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:31,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:31,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:31,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-05-03 14:54:31,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392198070] [2021-05-03 14:54:31,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:54:31,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:31,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:54:31,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:54:31,259 INFO L87 Difference]: Start difference. First operand 287 states and 846 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:31,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:31,441 INFO L93 Difference]: Finished difference Result 610 states and 1732 transitions. [2021-05-03 14:54:31,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:31,442 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:31,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:31,443 INFO L225 Difference]: With dead ends: 610 [2021-05-03 14:54:31,443 INFO L226 Difference]: Without dead ends: 591 [2021-05-03 14:54:31,443 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 177.7ms TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:54:31,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-05-03 14:54:31,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 293. [2021-05-03 14:54:31,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.98972602739726) internal successors, (873), 292 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:31,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 873 transitions. [2021-05-03 14:54:31,456 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 873 transitions. Word has length 18 [2021-05-03 14:54:31,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:31,457 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 873 transitions. [2021-05-03 14:54:31,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:31,457 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 873 transitions. [2021-05-03 14:54:31,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:31,457 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:31,457 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:31,662 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:31,662 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:31,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:31,662 INFO L82 PathProgramCache]: Analyzing trace with hash 327129171, now seen corresponding path program 38 times [2021-05-03 14:54:31,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:31,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707059256] [2021-05-03 14:54:31,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:31,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:31,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:31,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707059256] [2021-05-03 14:54:31,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958588042] [2021-05-03 14:54:31,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:31,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:54:31,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:31,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:31,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:31,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:31,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:31,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 14:54:31,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360159044] [2021-05-03 14:54:31,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:54:31,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:31,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:54:31,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:54:31,817 INFO L87 Difference]: Start difference. First operand 293 states and 873 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:31,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:31,998 INFO L93 Difference]: Finished difference Result 598 states and 1692 transitions. [2021-05-03 14:54:31,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:31,998 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:31,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:31,999 INFO L225 Difference]: With dead ends: 598 [2021-05-03 14:54:31,999 INFO L226 Difference]: Without dead ends: 575 [2021-05-03 14:54:31,999 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 171.2ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:54:32,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-05-03 14:54:32,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 295. [2021-05-03 14:54:32,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.9727891156462585) internal successors, (874), 294 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:32,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 874 transitions. [2021-05-03 14:54:32,004 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 874 transitions. Word has length 18 [2021-05-03 14:54:32,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:32,004 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 874 transitions. [2021-05-03 14:54:32,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:32,004 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 874 transitions. [2021-05-03 14:54:32,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:32,004 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:32,004 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:32,204 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:32,205 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:32,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:32,205 INFO L82 PathProgramCache]: Analyzing trace with hash -332522313, now seen corresponding path program 39 times [2021-05-03 14:54:32,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:32,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569516300] [2021-05-03 14:54:32,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:32,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:32,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:32,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569516300] [2021-05-03 14:54:32,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959158947] [2021-05-03 14:54:32,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:32,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 14:54:32,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:32,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:32,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:32,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:32,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:32,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-05-03 14:54:32,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821133583] [2021-05-03 14:54:32,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:54:32,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:32,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:54:32,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:54:32,401 INFO L87 Difference]: Start difference. First operand 295 states and 874 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:32,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:32,626 INFO L93 Difference]: Finished difference Result 653 states and 1829 transitions. [2021-05-03 14:54:32,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:32,626 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 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 [2021-05-03 14:54:32,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:32,627 INFO L225 Difference]: With dead ends: 653 [2021-05-03 14:54:32,627 INFO L226 Difference]: Without dead ends: 634 [2021-05-03 14:54:32,627 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 228.6ms TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:54:32,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-05-03 14:54:32,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 292. [2021-05-03 14:54:32,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.993127147766323) internal successors, (871), 291 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:32,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 871 transitions. [2021-05-03 14:54:32,631 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 871 transitions. Word has length 18 [2021-05-03 14:54:32,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:32,632 INFO L480 AbstractCegarLoop]: Abstraction has 292 states and 871 transitions. [2021-05-03 14:54:32,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:32,632 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 871 transitions. [2021-05-03 14:54:32,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:32,632 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:32,632 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:32,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:32,832 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:32,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:32,833 INFO L82 PathProgramCache]: Analyzing trace with hash -513650761, now seen corresponding path program 40 times [2021-05-03 14:54:32,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:32,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633866408] [2021-05-03 14:54:32,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:32,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:32,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:32,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633866408] [2021-05-03 14:54:32,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864863788] [2021-05-03 14:54:32,876 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:32,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:54:32,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:32,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:32,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:32,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:32,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:32,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 14:54:32,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222017447] [2021-05-03 14:54:32,986 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:54:32,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:32,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:54:32,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:54:32,986 INFO L87 Difference]: Start difference. First operand 292 states and 871 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:33,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:33,149 INFO L93 Difference]: Finished difference Result 634 states and 1800 transitions. [2021-05-03 14:54:33,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:33,149 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:33,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:33,150 INFO L225 Difference]: With dead ends: 634 [2021-05-03 14:54:33,150 INFO L226 Difference]: Without dead ends: 615 [2021-05-03 14:54:33,150 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 126.5ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:54:33,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-05-03 14:54:33,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 288. [2021-05-03 14:54:33,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 2.965156794425087) internal successors, (851), 287 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:33,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 851 transitions. [2021-05-03 14:54:33,155 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 851 transitions. Word has length 18 [2021-05-03 14:54:33,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:33,155 INFO L480 AbstractCegarLoop]: Abstraction has 288 states and 851 transitions. [2021-05-03 14:54:33,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:33,155 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 851 transitions. [2021-05-03 14:54:33,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:33,155 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:33,160 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:33,370 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:33,370 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:33,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:33,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1900023759, now seen corresponding path program 41 times [2021-05-03 14:54:33,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:33,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614587008] [2021-05-03 14:54:33,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:33,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:33,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:33,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614587008] [2021-05-03 14:54:33,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789338572] [2021-05-03 14:54:33,425 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:33,446 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:54:33,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:33,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:33,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:33,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:33,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:33,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 14:54:33,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344311569] [2021-05-03 14:54:33,545 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:54:33,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:33,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:54:33,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:54:33,546 INFO L87 Difference]: Start difference. First operand 288 states and 851 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:33,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:33,767 INFO L93 Difference]: Finished difference Result 606 states and 1702 transitions. [2021-05-03 14:54:33,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:33,767 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:33,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:33,768 INFO L225 Difference]: With dead ends: 606 [2021-05-03 14:54:33,768 INFO L226 Difference]: Without dead ends: 583 [2021-05-03 14:54:33,768 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 213.3ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:54:33,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-05-03 14:54:33,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 296. [2021-05-03 14:54:33,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.9593220338983053) internal successors, (873), 295 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:33,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 873 transitions. [2021-05-03 14:54:33,773 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 873 transitions. Word has length 18 [2021-05-03 14:54:33,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:33,773 INFO L480 AbstractCegarLoop]: Abstraction has 296 states and 873 transitions. [2021-05-03 14:54:33,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:33,773 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 873 transitions. [2021-05-03 14:54:33,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:33,774 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:33,774 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:33,974 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-05-03 14:54:33,974 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:33,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:33,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1416386093, now seen corresponding path program 42 times [2021-05-03 14:54:33,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:33,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813394037] [2021-05-03 14:54:33,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:33,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:34,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:34,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813394037] [2021-05-03 14:54:34,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402607595] [2021-05-03 14:54:34,024 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:34,045 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 14:54:34,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:34,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:34,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:34,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:34,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:34,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 14:54:34,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880040296] [2021-05-03 14:54:34,146 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:54:34,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:34,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:54:34,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:54:34,147 INFO L87 Difference]: Start difference. First operand 296 states and 873 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:34,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:34,377 INFO L93 Difference]: Finished difference Result 590 states and 1672 transitions. [2021-05-03 14:54:34,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:34,378 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:34,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:34,379 INFO L225 Difference]: With dead ends: 590 [2021-05-03 14:54:34,379 INFO L226 Difference]: Without dead ends: 571 [2021-05-03 14:54:34,379 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 202.1ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:54:34,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-05-03 14:54:34,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 285. [2021-05-03 14:54:34,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.9507042253521125) internal successors, (838), 284 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:34,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 838 transitions. [2021-05-03 14:54:34,383 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 838 transitions. Word has length 18 [2021-05-03 14:54:34,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:34,383 INFO L480 AbstractCegarLoop]: Abstraction has 285 states and 838 transitions. [2021-05-03 14:54:34,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:34,384 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 838 transitions. [2021-05-03 14:54:34,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:34,384 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:34,384 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:34,584 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2021-05-03 14:54:34,585 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:34,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:34,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1542604225, now seen corresponding path program 43 times [2021-05-03 14:54:34,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:34,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489138138] [2021-05-03 14:54:34,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:34,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:34,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:34,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489138138] [2021-05-03 14:54:34,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322633246] [2021-05-03 14:54:34,653 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:34,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:34,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:34,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:34,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:34,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:34,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-03 14:54:34,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672996284] [2021-05-03 14:54:34,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:54:34,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:34,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:54:34,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:54:34,762 INFO L87 Difference]: Start difference. First operand 285 states and 838 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:35,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:35,020 INFO L93 Difference]: Finished difference Result 479 states and 1339 transitions. [2021-05-03 14:54:35,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:35,021 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 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 [2021-05-03 14:54:35,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:35,021 INFO L225 Difference]: With dead ends: 479 [2021-05-03 14:54:35,021 INFO L226 Difference]: Without dead ends: 460 [2021-05-03 14:54:35,021 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 277.0ms TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:54:35,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-05-03 14:54:35,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 289. [2021-05-03 14:54:35,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 2.9444444444444446) internal successors, (848), 288 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:35,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 848 transitions. [2021-05-03 14:54:35,025 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 848 transitions. Word has length 18 [2021-05-03 14:54:35,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:35,025 INFO L480 AbstractCegarLoop]: Abstraction has 289 states and 848 transitions. [2021-05-03 14:54:35,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:35,025 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 848 transitions. [2021-05-03 14:54:35,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:35,025 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:35,025 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:35,226 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:35,226 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:35,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:35,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1745377557, now seen corresponding path program 44 times [2021-05-03 14:54:35,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:35,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469079001] [2021-05-03 14:54:35,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:35,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:35,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:35,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469079001] [2021-05-03 14:54:35,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349597947] [2021-05-03 14:54:35,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:35,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:54:35,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:35,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:35,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:35,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:35,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:35,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 14:54:35,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221270034] [2021-05-03 14:54:35,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:54:35,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:35,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:54:35,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:54:35,442 INFO L87 Difference]: Start difference. First operand 289 states and 848 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:35,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:35,725 INFO L93 Difference]: Finished difference Result 485 states and 1345 transitions. [2021-05-03 14:54:35,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:35,725 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:35,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:35,726 INFO L225 Difference]: With dead ends: 485 [2021-05-03 14:54:35,726 INFO L226 Difference]: Without dead ends: 462 [2021-05-03 14:54:35,726 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 315.8ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:54:35,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-05-03 14:54:35,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 297. [2021-05-03 14:54:35,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.939189189189189) internal successors, (870), 296 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:35,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 870 transitions. [2021-05-03 14:54:35,730 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 870 transitions. Word has length 18 [2021-05-03 14:54:35,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:35,731 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 870 transitions. [2021-05-03 14:54:35,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:35,731 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 870 transitions. [2021-05-03 14:54:35,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:35,731 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:35,731 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:35,931 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2021-05-03 14:54:35,932 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:35,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:35,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1334230119, now seen corresponding path program 45 times [2021-05-03 14:54:35,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:35,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138346668] [2021-05-03 14:54:35,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:35,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:35,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:35,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138346668] [2021-05-03 14:54:35,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678414763] [2021-05-03 14:54:35,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:36,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 14:54:36,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:36,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:36,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:36,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:36,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:36,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 14:54:36,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140324893] [2021-05-03 14:54:36,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:54:36,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:36,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:54:36,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:54:36,110 INFO L87 Difference]: Start difference. First operand 297 states and 870 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:36,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:36,390 INFO L93 Difference]: Finished difference Result 469 states and 1315 transitions. [2021-05-03 14:54:36,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:36,391 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:36,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:36,391 INFO L225 Difference]: With dead ends: 469 [2021-05-03 14:54:36,391 INFO L226 Difference]: Without dead ends: 450 [2021-05-03 14:54:36,391 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 276.5ms TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:54:36,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-05-03 14:54:36,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 285. [2021-05-03 14:54:36,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.9507042253521125) internal successors, (838), 284 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:36,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 838 transitions. [2021-05-03 14:54:36,395 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 838 transitions. Word has length 18 [2021-05-03 14:54:36,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:36,395 INFO L480 AbstractCegarLoop]: Abstraction has 285 states and 838 transitions. [2021-05-03 14:54:36,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:36,395 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 838 transitions. [2021-05-03 14:54:36,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:36,396 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:36,396 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:36,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable281 [2021-05-03 14:54:36,605 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:36,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:36,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1633409787, now seen corresponding path program 46 times [2021-05-03 14:54:36,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:36,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243691690] [2021-05-03 14:54:36,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:36,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:36,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:36,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243691690] [2021-05-03 14:54:36,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220082197] [2021-05-03 14:54:36,667 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:36,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:54:36,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:36,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:36,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:36,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:36,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:36,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 14:54:36,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116859448] [2021-05-03 14:54:36,785 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:54:36,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:36,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:54:36,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:54:36,785 INFO L87 Difference]: Start difference. First operand 285 states and 838 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:37,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:37,070 INFO L93 Difference]: Finished difference Result 433 states and 1220 transitions. [2021-05-03 14:54:37,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:37,070 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:37,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:37,071 INFO L225 Difference]: With dead ends: 433 [2021-05-03 14:54:37,071 INFO L226 Difference]: Without dead ends: 406 [2021-05-03 14:54:37,071 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 292.4ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:54:37,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-05-03 14:54:37,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 287. [2021-05-03 14:54:37,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 2.9475524475524475) internal successors, (843), 286 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:37,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 843 transitions. [2021-05-03 14:54:37,075 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 843 transitions. Word has length 18 [2021-05-03 14:54:37,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:37,075 INFO L480 AbstractCegarLoop]: Abstraction has 287 states and 843 transitions. [2021-05-03 14:54:37,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:37,075 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 843 transitions. [2021-05-03 14:54:37,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:37,076 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:37,076 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:37,276 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:37,276 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:37,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:37,276 INFO L82 PathProgramCache]: Analyzing trace with hash 44908247, now seen corresponding path program 6 times [2021-05-03 14:54:37,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:37,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230120215] [2021-05-03 14:54:37,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:37,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:37,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:37,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230120215] [2021-05-03 14:54:37,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052211704] [2021-05-03 14:54:37,333 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:37,354 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 14:54:37,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:37,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:54:37,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:37,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:37,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:37,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 14:54:37,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867104267] [2021-05-03 14:54:37,420 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:54:37,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:37,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:54:37,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:54:37,420 INFO L87 Difference]: Start difference. First operand 287 states and 843 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:37,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:37,588 INFO L93 Difference]: Finished difference Result 476 states and 1332 transitions. [2021-05-03 14:54:37,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:37,588 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 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 [2021-05-03 14:54:37,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:37,589 INFO L225 Difference]: With dead ends: 476 [2021-05-03 14:54:37,589 INFO L226 Difference]: Without dead ends: 454 [2021-05-03 14:54:37,589 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 152.8ms TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:54:37,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-05-03 14:54:37,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 289. [2021-05-03 14:54:37,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 2.951388888888889) internal successors, (850), 288 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:37,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 850 transitions. [2021-05-03 14:54:37,593 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 850 transitions. Word has length 18 [2021-05-03 14:54:37,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:37,593 INFO L480 AbstractCegarLoop]: Abstraction has 289 states and 850 transitions. [2021-05-03 14:54:37,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:37,593 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 850 transitions. [2021-05-03 14:54:37,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:37,594 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:37,594 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:37,794 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2021-05-03 14:54:37,794 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:37,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:37,794 INFO L82 PathProgramCache]: Analyzing trace with hash -675858551, now seen corresponding path program 47 times [2021-05-03 14:54:37,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:37,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250475550] [2021-05-03 14:54:37,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:37,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:37,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:37,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250475550] [2021-05-03 14:54:37,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394693344] [2021-05-03 14:54:37,850 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:37,871 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:54:37,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:37,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:37,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:37,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:37,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:37,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 14:54:37,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422715372] [2021-05-03 14:54:37,968 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:54:37,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:37,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:54:37,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:54:37,969 INFO L87 Difference]: Start difference. First operand 289 states and 850 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:38,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:38,235 INFO L93 Difference]: Finished difference Result 434 states and 1224 transitions. [2021-05-03 14:54:38,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:38,236 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:38,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:38,236 INFO L225 Difference]: With dead ends: 434 [2021-05-03 14:54:38,236 INFO L226 Difference]: Without dead ends: 411 [2021-05-03 14:54:38,237 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 283.1ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:54:38,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-05-03 14:54:38,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 297. [2021-05-03 14:54:38,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.9527027027027026) internal successors, (874), 296 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:38,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 874 transitions. [2021-05-03 14:54:38,240 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 874 transitions. Word has length 18 [2021-05-03 14:54:38,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:38,240 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 874 transitions. [2021-05-03 14:54:38,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:38,241 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 874 transitions. [2021-05-03 14:54:38,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:38,241 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:38,241 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:38,441 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:38,441 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:38,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:38,442 INFO L82 PathProgramCache]: Analyzing trace with hash 438614075, now seen corresponding path program 7 times [2021-05-03 14:54:38,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:38,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006146151] [2021-05-03 14:54:38,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:38,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:38,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:38,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006146151] [2021-05-03 14:54:38,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531976806] [2021-05-03 14:54:38,482 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:38,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:38,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:54:38,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:38,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:38,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:38,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 14:54:38,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893473521] [2021-05-03 14:54:38,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:54:38,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:38,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:54:38,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:54:38,580 INFO L87 Difference]: Start difference. First operand 297 states and 874 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:38,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:38,743 INFO L93 Difference]: Finished difference Result 491 states and 1363 transitions. [2021-05-03 14:54:38,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:38,743 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 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 [2021-05-03 14:54:38,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:38,744 INFO L225 Difference]: With dead ends: 491 [2021-05-03 14:54:38,744 INFO L226 Difference]: Without dead ends: 469 [2021-05-03 14:54:38,744 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 144.4ms TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:54:38,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-05-03 14:54:38,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 297. [2021-05-03 14:54:38,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.9527027027027026) internal successors, (874), 296 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:38,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 874 transitions. [2021-05-03 14:54:38,749 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 874 transitions. Word has length 18 [2021-05-03 14:54:38,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:38,749 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 874 transitions. [2021-05-03 14:54:38,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:38,749 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 874 transitions. [2021-05-03 14:54:38,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:38,749 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:38,749 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:38,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable297 [2021-05-03 14:54:38,953 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:38,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:38,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1891218171, now seen corresponding path program 48 times [2021-05-03 14:54:38,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:38,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416797836] [2021-05-03 14:54:38,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:38,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:39,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:39,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416797836] [2021-05-03 14:54:39,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668007898] [2021-05-03 14:54:39,014 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:39,051 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 14:54:39,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:39,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:39,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:39,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:39,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:39,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 14:54:39,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621711794] [2021-05-03 14:54:39,156 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:54:39,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:39,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:54:39,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:54:39,156 INFO L87 Difference]: Start difference. First operand 297 states and 874 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:39,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:39,423 INFO L93 Difference]: Finished difference Result 409 states and 1172 transitions. [2021-05-03 14:54:39,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:39,423 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:39,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:39,424 INFO L225 Difference]: With dead ends: 409 [2021-05-03 14:54:39,424 INFO L226 Difference]: Without dead ends: 390 [2021-05-03 14:54:39,424 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 277.5ms TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:54:39,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-05-03 14:54:39,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 291. [2021-05-03 14:54:39,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.9551724137931035) internal successors, (857), 290 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:39,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 857 transitions. [2021-05-03 14:54:39,428 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 857 transitions. Word has length 18 [2021-05-03 14:54:39,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:39,428 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 857 transitions. [2021-05-03 14:54:39,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:39,428 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 857 transitions. [2021-05-03 14:54:39,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:39,428 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:39,428 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:39,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-05-03 14:54:39,629 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:39,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:39,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1494230001, now seen corresponding path program 8 times [2021-05-03 14:54:39,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:39,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254093225] [2021-05-03 14:54:39,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:39,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:39,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:39,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254093225] [2021-05-03 14:54:39,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:54:39,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-03 14:54:39,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301025109] [2021-05-03 14:54:39,684 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:54:39,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:39,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:54:39,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:54:39,684 INFO L87 Difference]: Start difference. First operand 291 states and 857 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) [2021-05-03 14:54:39,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:39,812 INFO L93 Difference]: Finished difference Result 449 states and 1262 transitions. [2021-05-03 14:54:39,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:39,812 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 [2021-05-03 14:54:39,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:39,813 INFO L225 Difference]: With dead ends: 449 [2021-05-03 14:54:39,813 INFO L226 Difference]: Without dead ends: 420 [2021-05-03 14:54:39,813 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 100.2ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:54:39,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-05-03 14:54:39,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 289. [2021-05-03 14:54:39,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 2.951388888888889) internal successors, (850), 288 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:39,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 850 transitions. [2021-05-03 14:54:39,816 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 850 transitions. Word has length 18 [2021-05-03 14:54:39,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:39,817 INFO L480 AbstractCegarLoop]: Abstraction has 289 states and 850 transitions. [2021-05-03 14:54:39,817 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) [2021-05-03 14:54:39,817 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 850 transitions. [2021-05-03 14:54:39,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:39,817 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:39,817 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:39,817 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303 [2021-05-03 14:54:39,817 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:39,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:39,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1770591994, now seen corresponding path program 6 times [2021-05-03 14:54:39,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:39,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899755260] [2021-05-03 14:54:39,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:39,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:39,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:39,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899755260] [2021-05-03 14:54:39,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726825748] [2021-05-03 14:54:39,849 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:39,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 14:54:39,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:39,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:54:39,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:39,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:39,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:39,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-05-03 14:54:39,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044739188] [2021-05-03 14:54:39,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:54:39,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:39,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:54:39,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:54:39,952 INFO L87 Difference]: Start difference. First operand 289 states and 850 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:40,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:40,091 INFO L93 Difference]: Finished difference Result 435 states and 1232 transitions. [2021-05-03 14:54:40,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:54:40,091 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:40,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:40,092 INFO L225 Difference]: With dead ends: 435 [2021-05-03 14:54:40,092 INFO L226 Difference]: Without dead ends: 347 [2021-05-03 14:54:40,092 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 125.9ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:54:40,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-05-03 14:54:40,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 255. [2021-05-03 14:54:40,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.9803149606299213) internal successors, (757), 254 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:40,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 757 transitions. [2021-05-03 14:54:40,096 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 757 transitions. Word has length 18 [2021-05-03 14:54:40,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:40,096 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 757 transitions. [2021-05-03 14:54:40,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:40,096 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 757 transitions. [2021-05-03 14:54:40,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:40,096 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:40,096 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:40,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:40,297 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:40,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:40,297 INFO L82 PathProgramCache]: Analyzing trace with hash 698798277, now seen corresponding path program 49 times [2021-05-03 14:54:40,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:40,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636456079] [2021-05-03 14:54:40,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:40,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:40,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:40,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636456079] [2021-05-03 14:54:40,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150047853] [2021-05-03 14:54:40,358 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:40,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:40,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:40,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:40,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:40,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:40,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-05-03 14:54:40,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666969608] [2021-05-03 14:54:40,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:54:40,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:40,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:54:40,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:54:40,462 INFO L87 Difference]: Start difference. First operand 255 states and 757 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:40,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:40,701 INFO L93 Difference]: Finished difference Result 457 states and 1299 transitions. [2021-05-03 14:54:40,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:40,701 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:40,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:40,702 INFO L225 Difference]: With dead ends: 457 [2021-05-03 14:54:40,702 INFO L226 Difference]: Without dead ends: 438 [2021-05-03 14:54:40,702 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 237.7ms TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:54:40,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-05-03 14:54:40,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 260. [2021-05-03 14:54:40,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 2.996138996138996) internal successors, (776), 259 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:40,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 776 transitions. [2021-05-03 14:54:40,706 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 776 transitions. Word has length 18 [2021-05-03 14:54:40,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:40,706 INFO L480 AbstractCegarLoop]: Abstraction has 260 states and 776 transitions. [2021-05-03 14:54:40,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:40,706 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 776 transitions. [2021-05-03 14:54:40,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:40,706 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:40,706 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:40,907 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:40,907 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:40,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:40,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1628959453, now seen corresponding path program 50 times [2021-05-03 14:54:40,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:40,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580875002] [2021-05-03 14:54:40,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:40,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:40,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:40,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580875002] [2021-05-03 14:54:40,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348577158] [2021-05-03 14:54:40,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:41,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:54:41,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:41,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:41,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:41,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:41,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:41,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 14:54:41,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560439918] [2021-05-03 14:54:41,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:54:41,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:41,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:54:41,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:54:41,087 INFO L87 Difference]: Start difference. First operand 260 states and 776 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:41,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:41,342 INFO L93 Difference]: Finished difference Result 461 states and 1299 transitions. [2021-05-03 14:54:41,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:41,343 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:41,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:41,343 INFO L225 Difference]: With dead ends: 461 [2021-05-03 14:54:41,343 INFO L226 Difference]: Without dead ends: 438 [2021-05-03 14:54:41,344 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 251.3ms TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:54:41,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-05-03 14:54:41,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 258. [2021-05-03 14:54:41,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.992217898832685) internal successors, (769), 257 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:41,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 769 transitions. [2021-05-03 14:54:41,347 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 769 transitions. Word has length 18 [2021-05-03 14:54:41,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:41,347 INFO L480 AbstractCegarLoop]: Abstraction has 258 states and 769 transitions. [2021-05-03 14:54:41,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:41,348 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 769 transitions. [2021-05-03 14:54:41,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:41,348 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:41,348 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:41,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable311,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:41,548 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:41,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:41,549 INFO L82 PathProgramCache]: Analyzing trace with hash 616266921, now seen corresponding path program 51 times [2021-05-03 14:54:41,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:41,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992964938] [2021-05-03 14:54:41,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:41,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:41,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:41,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992964938] [2021-05-03 14:54:41,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739815833] [2021-05-03 14:54:41,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:41,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 14:54:41,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:41,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:41,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:41,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:41,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:41,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-03 14:54:41,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704190494] [2021-05-03 14:54:41,704 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:54:41,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:41,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:54:41,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:54:41,704 INFO L87 Difference]: Start difference. First operand 258 states and 769 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:41,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:41,935 INFO L93 Difference]: Finished difference Result 455 states and 1280 transitions. [2021-05-03 14:54:41,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:41,935 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:41,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:41,936 INFO L225 Difference]: With dead ends: 455 [2021-05-03 14:54:41,936 INFO L226 Difference]: Without dead ends: 428 [2021-05-03 14:54:41,936 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 224.2ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:54:41,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-05-03 14:54:41,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 258. [2021-05-03 14:54:41,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.9844357976653697) internal successors, (767), 257 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:41,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 767 transitions. [2021-05-03 14:54:41,940 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 767 transitions. Word has length 18 [2021-05-03 14:54:41,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:41,940 INFO L480 AbstractCegarLoop]: Abstraction has 258 states and 767 transitions. [2021-05-03 14:54:41,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:41,940 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 767 transitions. [2021-05-03 14:54:41,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:41,940 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:41,940 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:42,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2021-05-03 14:54:42,149 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:42,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:42,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1345274345, now seen corresponding path program 9 times [2021-05-03 14:54:42,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:42,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499945099] [2021-05-03 14:54:42,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:42,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:42,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:42,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499945099] [2021-05-03 14:54:42,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028056832] [2021-05-03 14:54:42,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:42,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 14:54:42,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:42,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:54:42,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:42,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:42,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:42,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-05-03 14:54:42,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449591957] [2021-05-03 14:54:42,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:54:42,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:42,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:54:42,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:54:42,252 INFO L87 Difference]: Start difference. First operand 258 states and 767 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:42,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:42,307 INFO L93 Difference]: Finished difference Result 393 states and 1148 transitions. [2021-05-03 14:54:42,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 14:54:42,307 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:42,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:42,308 INFO L225 Difference]: With dead ends: 393 [2021-05-03 14:54:42,308 INFO L226 Difference]: Without dead ends: 353 [2021-05-03 14:54:42,308 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 49.1ms TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:54:42,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-05-03 14:54:42,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 247. [2021-05-03 14:54:42,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9878048780487805) internal successors, (735), 246 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:42,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 735 transitions. [2021-05-03 14:54:42,311 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 735 transitions. Word has length 18 [2021-05-03 14:54:42,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:42,311 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 735 transitions. [2021-05-03 14:54:42,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:42,311 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 735 transitions. [2021-05-03 14:54:42,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:42,311 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:42,311 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:42,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2021-05-03 14:54:42,512 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:42,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:42,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1782534729, now seen corresponding path program 52 times [2021-05-03 14:54:42,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:42,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963078487] [2021-05-03 14:54:42,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:42,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:42,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:42,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963078487] [2021-05-03 14:54:42,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151755063] [2021-05-03 14:54:42,569 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:42,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:54:42,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:42,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:42,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:42,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:42,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:42,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-05-03 14:54:42,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179427866] [2021-05-03 14:54:42,665 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:54:42,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:42,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:54:42,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:54:42,666 INFO L87 Difference]: Start difference. First operand 247 states and 735 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:42,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:42,865 INFO L93 Difference]: Finished difference Result 487 states and 1353 transitions. [2021-05-03 14:54:42,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:42,866 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:42,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:42,866 INFO L225 Difference]: With dead ends: 487 [2021-05-03 14:54:42,867 INFO L226 Difference]: Without dead ends: 468 [2021-05-03 14:54:42,867 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 177.5ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:54:42,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-05-03 14:54:42,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 253. [2021-05-03 14:54:42,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 3.0277777777777777) internal successors, (763), 252 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:42,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 763 transitions. [2021-05-03 14:54:42,870 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 763 transitions. Word has length 18 [2021-05-03 14:54:42,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:42,870 INFO L480 AbstractCegarLoop]: Abstraction has 253 states and 763 transitions. [2021-05-03 14:54:42,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:42,871 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 763 transitions. [2021-05-03 14:54:42,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:42,871 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:42,871 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:43,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2021-05-03 14:54:43,073 INFO L428 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:43,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:43,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1582271391, now seen corresponding path program 53 times [2021-05-03 14:54:43,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:43,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978871617] [2021-05-03 14:54:43,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:43,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:43,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:43,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978871617] [2021-05-03 14:54:43,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441343457] [2021-05-03 14:54:43,121 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:43,142 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:54:43,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:43,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:43,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:43,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:43,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:43,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 14:54:43,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156547246] [2021-05-03 14:54:43,226 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:54:43,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:43,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:54:43,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:54:43,226 INFO L87 Difference]: Start difference. First operand 253 states and 763 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:43,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:43,431 INFO L93 Difference]: Finished difference Result 491 states and 1353 transitions. [2021-05-03 14:54:43,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:43,431 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:43,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:43,432 INFO L225 Difference]: With dead ends: 491 [2021-05-03 14:54:43,432 INFO L226 Difference]: Without dead ends: 468 [2021-05-03 14:54:43,432 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 181.0ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:54:43,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-05-03 14:54:43,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 255. [2021-05-03 14:54:43,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 3.0078740157480315) internal successors, (764), 254 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:43,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 764 transitions. [2021-05-03 14:54:43,452 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 764 transitions. Word has length 18 [2021-05-03 14:54:43,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:43,452 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 764 transitions. [2021-05-03 14:54:43,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:43,453 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 764 transitions. [2021-05-03 14:54:43,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:43,453 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:43,453 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:43,669 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:43,669 INFO L428 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:43,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:43,669 INFO L82 PathProgramCache]: Analyzing trace with hash -951095685, now seen corresponding path program 10 times [2021-05-03 14:54:43,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:43,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579308535] [2021-05-03 14:54:43,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:43,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:43,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:43,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579308535] [2021-05-03 14:54:43,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814207032] [2021-05-03 14:54:43,692 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:43,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:54:43,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:43,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:54:43,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:43,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:43,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:43,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-05-03 14:54:43,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282603578] [2021-05-03 14:54:43,769 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:54:43,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:43,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:54:43,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:54:43,770 INFO L87 Difference]: Start difference. First operand 255 states and 764 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:43,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:43,830 INFO L93 Difference]: Finished difference Result 360 states and 1024 transitions. [2021-05-03 14:54:43,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 14:54:43,831 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:43,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:43,831 INFO L225 Difference]: With dead ends: 360 [2021-05-03 14:54:43,831 INFO L226 Difference]: Without dead ends: 320 [2021-05-03 14:54:43,832 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 52.8ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:54:43,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-05-03 14:54:43,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 249. [2021-05-03 14:54:43,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.971774193548387) internal successors, (737), 248 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:43,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 737 transitions. [2021-05-03 14:54:43,835 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 737 transitions. Word has length 18 [2021-05-03 14:54:43,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:43,835 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 737 transitions. [2021-05-03 14:54:43,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:43,835 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 737 transitions. [2021-05-03 14:54:43,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:43,835 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:43,835 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:44,040 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-05-03 14:54:44,041 INFO L428 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:44,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:44,041 INFO L82 PathProgramCache]: Analyzing trace with hash 2053044421, now seen corresponding path program 54 times [2021-05-03 14:54:44,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:44,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738049634] [2021-05-03 14:54:44,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:44,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:44,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:44,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738049634] [2021-05-03 14:54:44,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210516915] [2021-05-03 14:54:44,098 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:44,118 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 14:54:44,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:44,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:44,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:44,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:44,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:44,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-05-03 14:54:44,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90169815] [2021-05-03 14:54:44,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:54:44,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:44,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:54:44,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:54:44,241 INFO L87 Difference]: Start difference. First operand 249 states and 737 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:44,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:44,463 INFO L93 Difference]: Finished difference Result 461 states and 1276 transitions. [2021-05-03 14:54:44,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:44,463 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 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 [2021-05-03 14:54:44,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:44,464 INFO L225 Difference]: With dead ends: 461 [2021-05-03 14:54:44,464 INFO L226 Difference]: Without dead ends: 442 [2021-05-03 14:54:44,464 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 232.7ms TimeCoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:54:44,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-05-03 14:54:44,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 246. [2021-05-03 14:54:44,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.9959183673469387) internal successors, (734), 245 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:44,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 734 transitions. [2021-05-03 14:54:44,467 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 734 transitions. Word has length 18 [2021-05-03 14:54:44,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:44,467 INFO L480 AbstractCegarLoop]: Abstraction has 246 states and 734 transitions. [2021-05-03 14:54:44,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:44,467 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 734 transitions. [2021-05-03 14:54:44,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:44,468 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:44,468 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:44,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable337,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:44,668 INFO L428 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:44,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:44,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1871915973, now seen corresponding path program 55 times [2021-05-03 14:54:44,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:44,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683994501] [2021-05-03 14:54:44,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:44,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:44,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:44,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683994501] [2021-05-03 14:54:44,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073051186] [2021-05-03 14:54:44,714 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:44,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:44,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:44,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:44,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:44,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:44,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 14:54:44,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820125013] [2021-05-03 14:54:44,818 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:54:44,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:44,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:54:44,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:54:44,819 INFO L87 Difference]: Start difference. First operand 246 states and 734 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:44,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:44,986 INFO L93 Difference]: Finished difference Result 433 states and 1225 transitions. [2021-05-03 14:54:44,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:44,986 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:44,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:44,987 INFO L225 Difference]: With dead ends: 433 [2021-05-03 14:54:44,987 INFO L226 Difference]: Without dead ends: 414 [2021-05-03 14:54:44,987 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 142.3ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:54:44,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-05-03 14:54:44,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 242. [2021-05-03 14:54:44,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.962655601659751) internal successors, (714), 241 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:44,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 714 transitions. [2021-05-03 14:54:44,991 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 714 transitions. Word has length 18 [2021-05-03 14:54:44,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:44,991 INFO L480 AbstractCegarLoop]: Abstraction has 242 states and 714 transitions. [2021-05-03 14:54:44,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:44,991 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 714 transitions. [2021-05-03 14:54:44,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:44,991 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:44,991 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:45,192 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:45,192 INFO L428 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:45,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:45,192 INFO L82 PathProgramCache]: Analyzing trace with hash -116472655, now seen corresponding path program 11 times [2021-05-03 14:54:45,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:45,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806412528] [2021-05-03 14:54:45,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:45,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:45,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:45,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806412528] [2021-05-03 14:54:45,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:54:45,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:54:45,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312370987] [2021-05-03 14:54:45,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:54:45,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:45,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:54:45,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:54:45,247 INFO L87 Difference]: Start difference. First operand 242 states and 714 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) [2021-05-03 14:54:45,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:45,320 INFO L93 Difference]: Finished difference Result 287 states and 821 transitions. [2021-05-03 14:54:45,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 14:54:45,321 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 [2021-05-03 14:54:45,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:45,321 INFO L225 Difference]: With dead ends: 287 [2021-05-03 14:54:45,321 INFO L226 Difference]: Without dead ends: 234 [2021-05-03 14:54:45,321 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 73.0ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:54:45,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-05-03 14:54:45,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 210. [2021-05-03 14:54:45,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.9330143540669855) internal successors, (613), 209 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:45,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 613 transitions. [2021-05-03 14:54:45,324 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 613 transitions. Word has length 18 [2021-05-03 14:54:45,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:45,324 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 613 transitions. [2021-05-03 14:54:45,324 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) [2021-05-03 14:54:45,324 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 613 transitions. [2021-05-03 14:54:45,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:45,324 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:45,324 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:45,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable344 [2021-05-03 14:54:45,325 INFO L428 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:45,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:45,325 INFO L82 PathProgramCache]: Analyzing trace with hash -9376803, now seen corresponding path program 56 times [2021-05-03 14:54:45,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:45,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708921346] [2021-05-03 14:54:45,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:45,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:45,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:45,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708921346] [2021-05-03 14:54:45,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697001892] [2021-05-03 14:54:45,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:45,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:54:45,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:45,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:45,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:45,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:45,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:45,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 14:54:45,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962127382] [2021-05-03 14:54:45,492 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:54:45,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:45,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:54:45,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:54:45,492 INFO L87 Difference]: Start difference. First operand 210 states and 613 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:45,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:45,779 INFO L93 Difference]: Finished difference Result 427 states and 1174 transitions. [2021-05-03 14:54:45,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:45,779 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:45,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:45,780 INFO L225 Difference]: With dead ends: 427 [2021-05-03 14:54:45,780 INFO L226 Difference]: Without dead ends: 404 [2021-05-03 14:54:45,780 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 268.0ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:54:45,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-05-03 14:54:45,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 218. [2021-05-03 14:54:45,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.9262672811059907) internal successors, (635), 217 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:45,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 635 transitions. [2021-05-03 14:54:45,783 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 635 transitions. Word has length 18 [2021-05-03 14:54:45,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:45,783 INFO L480 AbstractCegarLoop]: Abstraction has 218 states and 635 transitions. [2021-05-03 14:54:45,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:45,783 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 635 transitions. [2021-05-03 14:54:45,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:45,784 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:45,784 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:45,984 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2021-05-03 14:54:45,984 INFO L428 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:45,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:45,984 INFO L82 PathProgramCache]: Analyzing trace with hash 969180641, now seen corresponding path program 57 times [2021-05-03 14:54:45,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:45,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895672611] [2021-05-03 14:54:45,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:45,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:46,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:46,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895672611] [2021-05-03 14:54:46,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637550889] [2021-05-03 14:54:46,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:46,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 14:54:46,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:46,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:46,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:46,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:46,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:46,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 14:54:46,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427780529] [2021-05-03 14:54:46,135 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:54:46,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:46,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:54:46,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:54:46,135 INFO L87 Difference]: Start difference. First operand 218 states and 635 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:46,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:46,339 INFO L93 Difference]: Finished difference Result 411 states and 1144 transitions. [2021-05-03 14:54:46,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:46,339 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:46,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:46,340 INFO L225 Difference]: With dead ends: 411 [2021-05-03 14:54:46,340 INFO L226 Difference]: Without dead ends: 392 [2021-05-03 14:54:46,340 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 187.2ms TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:54:46,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-05-03 14:54:46,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 209. [2021-05-03 14:54:46,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.923076923076923) internal successors, (608), 208 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:46,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 608 transitions. [2021-05-03 14:54:46,343 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 608 transitions. Word has length 18 [2021-05-03 14:54:46,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:46,343 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 608 transitions. [2021-05-03 14:54:46,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:46,343 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 608 transitions. [2021-05-03 14:54:46,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:46,343 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:46,344 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:46,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:46,544 INFO L428 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:46,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:46,544 INFO L82 PathProgramCache]: Analyzing trace with hash 2131358893, now seen corresponding path program 58 times [2021-05-03 14:54:46,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:46,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387862638] [2021-05-03 14:54:46,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:46,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:46,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:46,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387862638] [2021-05-03 14:54:46,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026495813] [2021-05-03 14:54:46,596 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:46,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:54:46,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:46,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:46,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:46,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:46,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:46,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-03 14:54:46,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959242562] [2021-05-03 14:54:46,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:54:46,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:46,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:54:46,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:54:46,687 INFO L87 Difference]: Start difference. First operand 209 states and 608 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:46,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:46,907 INFO L93 Difference]: Finished difference Result 371 states and 1026 transitions. [2021-05-03 14:54:46,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:46,907 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:46,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:46,908 INFO L225 Difference]: With dead ends: 371 [2021-05-03 14:54:46,908 INFO L226 Difference]: Without dead ends: 344 [2021-05-03 14:54:46,908 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 218.2ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:54:46,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-05-03 14:54:46,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 211. [2021-05-03 14:54:46,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.919047619047619) internal successors, (613), 210 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:46,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 613 transitions. [2021-05-03 14:54:46,911 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 613 transitions. Word has length 18 [2021-05-03 14:54:46,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:46,911 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 613 transitions. [2021-05-03 14:54:46,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:46,911 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 613 transitions. [2021-05-03 14:54:46,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:46,912 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:46,912 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:47,112 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable353,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:47,113 INFO L428 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:47,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:47,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1750676137, now seen corresponding path program 59 times [2021-05-03 14:54:47,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:47,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792042222] [2021-05-03 14:54:47,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:47,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:47,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:47,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792042222] [2021-05-03 14:54:47,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794819836] [2021-05-03 14:54:47,166 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:47,197 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:54:47,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:47,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:47,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:47,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:47,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:47,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 14:54:47,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880309736] [2021-05-03 14:54:47,281 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:54:47,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:47,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:54:47,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:54:47,281 INFO L87 Difference]: Start difference. First operand 211 states and 613 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:47,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:47,526 INFO L93 Difference]: Finished difference Result 363 states and 1008 transitions. [2021-05-03 14:54:47,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:47,527 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:47,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:47,528 INFO L225 Difference]: With dead ends: 363 [2021-05-03 14:54:47,528 INFO L226 Difference]: Without dead ends: 340 [2021-05-03 14:54:47,528 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 243.1ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:54:47,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-05-03 14:54:47,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 219. [2021-05-03 14:54:47,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.9128440366972477) internal successors, (635), 218 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:47,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 635 transitions. [2021-05-03 14:54:47,531 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 635 transitions. Word has length 18 [2021-05-03 14:54:47,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:47,531 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 635 transitions. [2021-05-03 14:54:47,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:47,531 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 635 transitions. [2021-05-03 14:54:47,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:47,531 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:47,531 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:47,731 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable358 [2021-05-03 14:54:47,732 INFO L428 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:47,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:47,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1565733715, now seen corresponding path program 60 times [2021-05-03 14:54:47,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:47,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848887962] [2021-05-03 14:54:47,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:47,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:47,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:47,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848887962] [2021-05-03 14:54:47,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077497397] [2021-05-03 14:54:47,785 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:47,806 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 14:54:47,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:47,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:47,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:47,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:47,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:47,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 14:54:47,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028741037] [2021-05-03 14:54:47,891 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:54:47,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:47,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:54:47,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:54:47,891 INFO L87 Difference]: Start difference. First operand 219 states and 635 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:48,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:48,120 INFO L93 Difference]: Finished difference Result 338 states and 956 transitions. [2021-05-03 14:54:48,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:48,121 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:48,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:48,121 INFO L225 Difference]: With dead ends: 338 [2021-05-03 14:54:48,121 INFO L226 Difference]: Without dead ends: 319 [2021-05-03 14:54:48,121 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 225.1ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:54:48,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-05-03 14:54:48,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 209. [2021-05-03 14:54:48,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.923076923076923) internal successors, (608), 208 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:48,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 608 transitions. [2021-05-03 14:54:48,124 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 608 transitions. Word has length 18 [2021-05-03 14:54:48,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:48,124 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 608 transitions. [2021-05-03 14:54:48,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:48,124 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 608 transitions. [2021-05-03 14:54:48,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:48,125 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:48,125 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:48,325 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:48,325 INFO L428 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:48,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:48,326 INFO L82 PathProgramCache]: Analyzing trace with hash -2071414893, now seen corresponding path program 61 times [2021-05-03 14:54:48,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:48,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405589365] [2021-05-03 14:54:48,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:48,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:48,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:48,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405589365] [2021-05-03 14:54:48,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180609102] [2021-05-03 14:54:48,398 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:48,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:48,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:48,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:48,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:48,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:48,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-03 14:54:48,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587449857] [2021-05-03 14:54:48,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:54:48,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:48,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:54:48,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:54:48,511 INFO L87 Difference]: Start difference. First operand 209 states and 608 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:48,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:48,765 INFO L93 Difference]: Finished difference Result 369 states and 1028 transitions. [2021-05-03 14:54:48,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:48,765 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:48,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:48,766 INFO L225 Difference]: With dead ends: 369 [2021-05-03 14:54:48,766 INFO L226 Difference]: Without dead ends: 350 [2021-05-03 14:54:48,766 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 285.7ms TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:54:48,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-05-03 14:54:48,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 214. [2021-05-03 14:54:48,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.92018779342723) internal successors, (622), 213 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:48,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 622 transitions. [2021-05-03 14:54:48,769 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 622 transitions. Word has length 18 [2021-05-03 14:54:48,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:48,769 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 622 transitions. [2021-05-03 14:54:48,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:48,769 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 622 transitions. [2021-05-03 14:54:48,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:48,770 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:48,770 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:48,970 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-05-03 14:54:48,970 INFO L428 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:48,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:48,970 INFO L82 PathProgramCache]: Analyzing trace with hash 2067720571, now seen corresponding path program 62 times [2021-05-03 14:54:48,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:48,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779798293] [2021-05-03 14:54:48,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:48,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:49,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:49,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779798293] [2021-05-03 14:54:49,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629990819] [2021-05-03 14:54:49,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:49,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:54:49,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:49,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:49,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:49,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:49,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:49,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-03 14:54:49,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518557206] [2021-05-03 14:54:49,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:54:49,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:49,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:54:49,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:54:49,154 INFO L87 Difference]: Start difference. First operand 214 states and 622 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:49,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:49,397 INFO L93 Difference]: Finished difference Result 412 states and 1121 transitions. [2021-05-03 14:54:49,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:49,397 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:49,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:49,397 INFO L225 Difference]: With dead ends: 412 [2021-05-03 14:54:49,397 INFO L226 Difference]: Without dead ends: 393 [2021-05-03 14:54:49,398 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 272.9ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:54:49,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-05-03 14:54:49,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 216. [2021-05-03 14:54:49,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.925581395348837) internal successors, (629), 215 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:49,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 629 transitions. [2021-05-03 14:54:49,400 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 629 transitions. Word has length 18 [2021-05-03 14:54:49,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:49,401 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 629 transitions. [2021-05-03 14:54:49,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:49,401 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 629 transitions. [2021-05-03 14:54:49,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:49,401 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:49,401 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:49,601 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable369 [2021-05-03 14:54:49,601 INFO L428 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:49,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:49,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1297085549, now seen corresponding path program 63 times [2021-05-03 14:54:49,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:49,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603537742] [2021-05-03 14:54:49,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:49,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:49,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:49,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603537742] [2021-05-03 14:54:49,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781193229] [2021-05-03 14:54:49,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:49,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 14:54:49,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:49,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:49,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:49,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:49,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:49,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 14:54:49,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984592998] [2021-05-03 14:54:49,779 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:54:49,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:49,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:54:49,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:54:49,779 INFO L87 Difference]: Start difference. First operand 216 states and 629 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:50,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:50,045 INFO L93 Difference]: Finished difference Result 375 states and 1035 transitions. [2021-05-03 14:54:50,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:50,045 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:50,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:50,046 INFO L225 Difference]: With dead ends: 375 [2021-05-03 14:54:50,046 INFO L226 Difference]: Without dead ends: 352 [2021-05-03 14:54:50,046 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 279.3ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:54:50,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-05-03 14:54:50,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 212. [2021-05-03 14:54:50,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.924170616113744) internal successors, (617), 211 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:50,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 617 transitions. [2021-05-03 14:54:50,049 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 617 transitions. Word has length 18 [2021-05-03 14:54:50,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:50,049 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 617 transitions. [2021-05-03 14:54:50,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:50,049 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 617 transitions. [2021-05-03 14:54:50,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:50,050 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:50,050 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:50,250 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:50,250 INFO L428 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:50,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:50,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1181922291, now seen corresponding path program 64 times [2021-05-03 14:54:50,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:50,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609071722] [2021-05-03 14:54:50,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:50,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:50,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:50,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609071722] [2021-05-03 14:54:50,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195716336] [2021-05-03 14:54:50,324 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:50,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:54:50,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:50,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:50,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:50,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:50,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:50,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-03 14:54:50,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293236945] [2021-05-03 14:54:50,455 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:54:50,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:50,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:54:50,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:54:50,455 INFO L87 Difference]: Start difference. First operand 212 states and 617 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:50,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:50,759 INFO L93 Difference]: Finished difference Result 392 states and 1071 transitions. [2021-05-03 14:54:50,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:50,759 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:50,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:50,760 INFO L225 Difference]: With dead ends: 392 [2021-05-03 14:54:50,760 INFO L226 Difference]: Without dead ends: 373 [2021-05-03 14:54:50,760 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 322.2ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:54:50,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-05-03 14:54:50,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 216. [2021-05-03 14:54:50,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.9348837209302325) internal successors, (631), 215 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:50,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 631 transitions. [2021-05-03 14:54:50,763 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 631 transitions. Word has length 18 [2021-05-03 14:54:50,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:50,763 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 631 transitions. [2021-05-03 14:54:50,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:50,763 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 631 transitions. [2021-05-03 14:54:50,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:50,764 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:50,764 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:50,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable377,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:50,964 INFO L428 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:50,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:50,964 INFO L82 PathProgramCache]: Analyzing trace with hash 2112083467, now seen corresponding path program 65 times [2021-05-03 14:54:50,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:50,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93083619] [2021-05-03 14:54:50,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:50,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:51,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:51,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93083619] [2021-05-03 14:54:51,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905863309] [2021-05-03 14:54:51,030 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:54:51,057 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:54:51,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:51,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:51,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:51,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:51,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:51,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 14:54:51,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023685595] [2021-05-03 14:54:51,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:54:51,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:51,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:54:51,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:54:51,180 INFO L87 Difference]: Start difference. First operand 216 states and 631 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:51,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:51,487 INFO L93 Difference]: Finished difference Result 396 states and 1071 transitions. [2021-05-03 14:54:51,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:51,488 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:51,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:51,488 INFO L225 Difference]: With dead ends: 396 [2021-05-03 14:54:51,488 INFO L226 Difference]: Without dead ends: 373 [2021-05-03 14:54:51,489 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 340.1ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:54:51,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-05-03 14:54:51,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 214. [2021-05-03 14:54:51,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.9295774647887325) internal successors, (624), 213 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:51,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 624 transitions. [2021-05-03 14:54:51,492 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 624 transitions. Word has length 18 [2021-05-03 14:54:51,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:51,492 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 624 transitions. [2021-05-03 14:54:51,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:51,492 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 624 transitions. [2021-05-03 14:54:51,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:51,492 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:51,492 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:51,693 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable380 [2021-05-03 14:54:51,693 INFO L428 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:51,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:51,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1099390935, now seen corresponding path program 66 times [2021-05-03 14:54:51,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:51,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556191403] [2021-05-03 14:54:51,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:51,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:51,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:51,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556191403] [2021-05-03 14:54:51,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319907116] [2021-05-03 14:54:51,747 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:51,767 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 14:54:51,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:51,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:51,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:51,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:51,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:51,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 14:54:51,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124895969] [2021-05-03 14:54:51,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:54:51,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:51,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:54:51,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:54:51,867 INFO L87 Difference]: Start difference. First operand 214 states and 624 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:52,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:52,134 INFO L93 Difference]: Finished difference Result 361 states and 998 transitions. [2021-05-03 14:54:52,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:52,134 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:52,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:52,135 INFO L225 Difference]: With dead ends: 361 [2021-05-03 14:54:52,135 INFO L226 Difference]: Without dead ends: 334 [2021-05-03 14:54:52,135 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 276.0ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:54:52,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-05-03 14:54:52,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 212. [2021-05-03 14:54:52,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.924170616113744) internal successors, (617), 211 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:52,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 617 transitions. [2021-05-03 14:54:52,138 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 617 transitions. Word has length 18 [2021-05-03 14:54:52,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:52,138 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 617 transitions. [2021-05-03 14:54:52,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:52,138 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 617 transitions. [2021-05-03 14:54:52,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:52,139 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:52,139 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:52,339 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:52,339 INFO L428 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:52,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:52,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1459644047, now seen corresponding path program 67 times [2021-05-03 14:54:52,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:52,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141673515] [2021-05-03 14:54:52,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:52,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:52,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:52,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141673515] [2021-05-03 14:54:52,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002871369] [2021-05-03 14:54:52,399 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:52,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:52,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:52,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:52,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:52,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:52,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-03 14:54:52,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938893629] [2021-05-03 14:54:52,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:54:52,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:52,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:54:52,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:54:52,509 INFO L87 Difference]: Start difference. First operand 212 states and 617 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:52,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:52,742 INFO L93 Difference]: Finished difference Result 491 states and 1355 transitions. [2021-05-03 14:54:52,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:52,743 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:52,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:52,744 INFO L225 Difference]: With dead ends: 491 [2021-05-03 14:54:52,744 INFO L226 Difference]: Without dead ends: 472 [2021-05-03 14:54:52,744 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 230.9ms TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:54:52,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-05-03 14:54:52,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 218. [2021-05-03 14:54:52,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.9400921658986174) internal successors, (638), 217 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:52,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 638 transitions. [2021-05-03 14:54:52,747 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 638 transitions. Word has length 18 [2021-05-03 14:54:52,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:52,747 INFO L480 AbstractCegarLoop]: Abstraction has 218 states and 638 transitions. [2021-05-03 14:54:52,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:52,747 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 638 transitions. [2021-05-03 14:54:52,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:52,748 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:52,748 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:52,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:52,948 INFO L428 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:52,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:52,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1303812215, now seen corresponding path program 68 times [2021-05-03 14:54:52,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:52,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822921788] [2021-05-03 14:54:52,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:52,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:53,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:53,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822921788] [2021-05-03 14:54:53,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766235823] [2021-05-03 14:54:53,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:54:53,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:54:53,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:53,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:53,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:53,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:53,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:53,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-03 14:54:53,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252825478] [2021-05-03 14:54:53,182 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:54:53,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:53,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:54:53,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:54:53,183 INFO L87 Difference]: Start difference. First operand 218 states and 638 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:53,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:53,428 INFO L93 Difference]: Finished difference Result 526 states and 1428 transitions. [2021-05-03 14:54:53,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:53,428 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:53,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:53,429 INFO L225 Difference]: With dead ends: 526 [2021-05-03 14:54:53,429 INFO L226 Difference]: Without dead ends: 507 [2021-05-03 14:54:53,429 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 274.1ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:54:53,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-05-03 14:54:53,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 222. [2021-05-03 14:54:53,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.9592760180995477) internal successors, (654), 221 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:53,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 654 transitions. [2021-05-03 14:54:53,433 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 654 transitions. Word has length 18 [2021-05-03 14:54:53,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:53,433 INFO L480 AbstractCegarLoop]: Abstraction has 222 states and 654 transitions. [2021-05-03 14:54:53,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:53,433 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 654 transitions. [2021-05-03 14:54:53,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:53,434 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:53,434 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:53,649 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:53,650 INFO L428 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:53,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:53,650 INFO L82 PathProgramCache]: Analyzing trace with hash -2060993905, now seen corresponding path program 69 times [2021-05-03 14:54:53,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:53,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511950080] [2021-05-03 14:54:53,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:53,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:53,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:53,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511950080] [2021-05-03 14:54:53,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776097154] [2021-05-03 14:54:53,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:53,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 14:54:53,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:53,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:53,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:53,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:53,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:53,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 14:54:53,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337042895] [2021-05-03 14:54:53,844 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:54:53,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:53,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:54:53,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:54:53,845 INFO L87 Difference]: Start difference. First operand 222 states and 654 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:54,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:54,100 INFO L93 Difference]: Finished difference Result 489 states and 1342 transitions. [2021-05-03 14:54:54,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:54,100 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:54,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:54,101 INFO L225 Difference]: With dead ends: 489 [2021-05-03 14:54:54,101 INFO L226 Difference]: Without dead ends: 466 [2021-05-03 14:54:54,102 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 264.9ms TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:54:54,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-05-03 14:54:54,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 222. [2021-05-03 14:54:54,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.9411764705882355) internal successors, (650), 221 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:54,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 650 transitions. [2021-05-03 14:54:54,105 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 650 transitions. Word has length 18 [2021-05-03 14:54:54,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:54,105 INFO L480 AbstractCegarLoop]: Abstraction has 222 states and 650 transitions. [2021-05-03 14:54:54,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:54,106 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 650 transitions. [2021-05-03 14:54:54,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:54,106 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:54,106 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:54,306 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:54,306 INFO L428 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:54,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:54,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1255509907, now seen corresponding path program 70 times [2021-05-03 14:54:54,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:54,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549166026] [2021-05-03 14:54:54,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:54,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:54,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:54,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549166026] [2021-05-03 14:54:54,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810370007] [2021-05-03 14:54:54,363 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:54,383 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:54:54,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:54,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:54,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:54,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:54,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:54,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-03 14:54:54,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346321535] [2021-05-03 14:54:54,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:54:54,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:54,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:54:54,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:54:54,468 INFO L87 Difference]: Start difference. First operand 222 states and 650 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:54,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:54,656 INFO L93 Difference]: Finished difference Result 452 states and 1260 transitions. [2021-05-03 14:54:54,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:54,657 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:54,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:54,658 INFO L225 Difference]: With dead ends: 452 [2021-05-03 14:54:54,658 INFO L226 Difference]: Without dead ends: 433 [2021-05-03 14:54:54,658 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 188.8ms TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:54:54,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-05-03 14:54:54,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 217. [2021-05-03 14:54:54,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.949074074074074) internal successors, (637), 216 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:54,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 637 transitions. [2021-05-03 14:54:54,661 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 637 transitions. Word has length 18 [2021-05-03 14:54:54,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:54,661 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 637 transitions. [2021-05-03 14:54:54,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:54,661 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 637 transitions. [2021-05-03 14:54:54,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:54,662 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:54,662 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:54,877 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable401,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:54,877 INFO L428 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:54,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:54,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1030444307, now seen corresponding path program 71 times [2021-05-03 14:54:54,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:54,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973696054] [2021-05-03 14:54:54,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:54,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:54,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:54,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973696054] [2021-05-03 14:54:54,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643897769] [2021-05-03 14:54:54,928 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:54,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:54:54,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:54,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:54,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:55,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:55,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:55,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 14:54:55,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423560401] [2021-05-03 14:54:55,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:54:55,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:55,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:54:55,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:54:55,046 INFO L87 Difference]: Start difference. First operand 217 states and 637 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:55,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:55,201 INFO L93 Difference]: Finished difference Result 433 states and 1227 transitions. [2021-05-03 14:54:55,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:55,202 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:55,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:55,202 INFO L225 Difference]: With dead ends: 433 [2021-05-03 14:54:55,203 INFO L226 Difference]: Without dead ends: 414 [2021-05-03 14:54:55,203 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 148.4ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:54:55,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-05-03 14:54:55,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 221. [2021-05-03 14:54:55,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.9863636363636363) internal successors, (657), 220 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:55,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 657 transitions. [2021-05-03 14:54:55,206 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 657 transitions. Word has length 18 [2021-05-03 14:54:55,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:55,206 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 657 transitions. [2021-05-03 14:54:55,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:55,206 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 657 transitions. [2021-05-03 14:54:55,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:55,207 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:55,207 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:55,407 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2021-05-03 14:54:55,407 INFO L428 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:55,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:55,407 INFO L82 PathProgramCache]: Analyzing trace with hash -668276081, now seen corresponding path program 72 times [2021-05-03 14:54:55,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:55,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288605651] [2021-05-03 14:54:55,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:55,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:55,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:55,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288605651] [2021-05-03 14:54:55,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867824270] [2021-05-03 14:54:55,453 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:55,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 14:54:55,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:55,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:55,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:55,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:55,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:55,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-03 14:54:55,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437721897] [2021-05-03 14:54:55,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:54:55,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:55,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:54:55,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:54:55,540 INFO L87 Difference]: Start difference. First operand 221 states and 657 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:55,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:55,690 INFO L93 Difference]: Finished difference Result 404 states and 1161 transitions. [2021-05-03 14:54:55,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:55,690 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:55,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:55,691 INFO L225 Difference]: With dead ends: 404 [2021-05-03 14:54:55,691 INFO L226 Difference]: Without dead ends: 385 [2021-05-03 14:54:55,691 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 120.1ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:54:55,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-05-03 14:54:55,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 213. [2021-05-03 14:54:55,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.9292452830188678) internal successors, (621), 212 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:55,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 621 transitions. [2021-05-03 14:54:55,694 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 621 transitions. Word has length 18 [2021-05-03 14:54:55,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:55,694 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 621 transitions. [2021-05-03 14:54:55,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:55,694 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 621 transitions. [2021-05-03 14:54:55,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:55,694 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:55,694 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:55,894 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:55,895 INFO L428 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:55,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:55,895 INFO L82 PathProgramCache]: Analyzing trace with hash -188192517, now seen corresponding path program 73 times [2021-05-03 14:54:55,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:55,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482845752] [2021-05-03 14:54:55,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:55,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:55,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:55,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482845752] [2021-05-03 14:54:55,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33219464] [2021-05-03 14:54:55,956 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:55,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:55,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:55,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:56,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:56,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:56,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-03 14:54:56,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073806103] [2021-05-03 14:54:56,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:54:56,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:56,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:54:56,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:54:56,072 INFO L87 Difference]: Start difference. First operand 213 states and 621 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:56,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:56,273 INFO L93 Difference]: Finished difference Result 502 states and 1407 transitions. [2021-05-03 14:54:56,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:56,273 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:56,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:56,274 INFO L225 Difference]: With dead ends: 502 [2021-05-03 14:54:56,274 INFO L226 Difference]: Without dead ends: 483 [2021-05-03 14:54:56,274 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 204.0ms TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:54:56,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-05-03 14:54:56,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 219. [2021-05-03 14:54:56,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.9724770642201834) internal successors, (648), 218 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:56,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 648 transitions. [2021-05-03 14:54:56,278 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 648 transitions. Word has length 18 [2021-05-03 14:54:56,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:56,278 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 648 transitions. [2021-05-03 14:54:56,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:56,278 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 648 transitions. [2021-05-03 14:54:56,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:56,278 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:56,278 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:56,478 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-05-03 14:54:56,479 INFO L428 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:56,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:56,479 INFO L82 PathProgramCache]: Analyzing trace with hash 741968659, now seen corresponding path program 74 times [2021-05-03 14:54:56,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:56,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963839988] [2021-05-03 14:54:56,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:56,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:56,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:56,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963839988] [2021-05-03 14:54:56,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321391157] [2021-05-03 14:54:56,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:56,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:54:56,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:56,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:56,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:56,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:56,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:56,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 14:54:56,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717143356] [2021-05-03 14:54:56,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:54:56,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:56,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:54:56,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:54:56,656 INFO L87 Difference]: Start difference. First operand 219 states and 648 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:56,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:56,858 INFO L93 Difference]: Finished difference Result 490 states and 1367 transitions. [2021-05-03 14:54:56,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:56,858 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:56,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:56,859 INFO L225 Difference]: With dead ends: 490 [2021-05-03 14:54:56,859 INFO L226 Difference]: Without dead ends: 467 [2021-05-03 14:54:56,859 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 198.4ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:54:56,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-05-03 14:54:56,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 221. [2021-05-03 14:54:56,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.95) internal successors, (649), 220 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:56,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 649 transitions. [2021-05-03 14:54:56,863 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 649 transitions. Word has length 18 [2021-05-03 14:54:56,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:56,863 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 649 transitions. [2021-05-03 14:54:56,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:56,863 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 649 transitions. [2021-05-03 14:54:56,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:56,863 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:56,863 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:57,063 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable413,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:57,064 INFO L428 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:57,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:57,064 INFO L82 PathProgramCache]: Analyzing trace with hash 82317175, now seen corresponding path program 75 times [2021-05-03 14:54:57,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:57,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18633737] [2021-05-03 14:54:57,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:57,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:57,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:57,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18633737] [2021-05-03 14:54:57,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256090393] [2021-05-03 14:54:57,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:57,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 14:54:57,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:57,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:57,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:57,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:57,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:57,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-05-03 14:54:57,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605726666] [2021-05-03 14:54:57,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:54:57,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:57,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:54:57,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:54:57,243 INFO L87 Difference]: Start difference. First operand 221 states and 649 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:57,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:57,551 INFO L93 Difference]: Finished difference Result 505 states and 1410 transitions. [2021-05-03 14:54:57,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:57,551 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 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 [2021-05-03 14:54:57,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:57,552 INFO L225 Difference]: With dead ends: 505 [2021-05-03 14:54:57,552 INFO L226 Difference]: Without dead ends: 486 [2021-05-03 14:54:57,552 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 254.3ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:54:57,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-05-03 14:54:57,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 218. [2021-05-03 14:54:57,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.9769585253456223) internal successors, (646), 217 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:57,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 646 transitions. [2021-05-03 14:54:57,555 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 646 transitions. Word has length 18 [2021-05-03 14:54:57,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:57,555 INFO L480 AbstractCegarLoop]: Abstraction has 218 states and 646 transitions. [2021-05-03 14:54:57,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:57,556 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 646 transitions. [2021-05-03 14:54:57,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:57,556 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:57,556 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:57,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable418 [2021-05-03 14:54:57,756 INFO L428 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:57,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:57,757 INFO L82 PathProgramCache]: Analyzing trace with hash -98811273, now seen corresponding path program 76 times [2021-05-03 14:54:57,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:57,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787921837] [2021-05-03 14:54:57,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:57,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:57,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:57,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787921837] [2021-05-03 14:54:57,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591905329] [2021-05-03 14:54:57,800 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:57,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:54:57,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:57,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:57,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:57,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:57,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:57,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 14:54:57,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706429726] [2021-05-03 14:54:57,901 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:54:57,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:57,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:54:57,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:54:57,901 INFO L87 Difference]: Start difference. First operand 218 states and 646 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:58,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:58,043 INFO L93 Difference]: Finished difference Result 486 states and 1381 transitions. [2021-05-03 14:54:58,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:58,044 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:58,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:58,044 INFO L225 Difference]: With dead ends: 486 [2021-05-03 14:54:58,045 INFO L226 Difference]: Without dead ends: 467 [2021-05-03 14:54:58,045 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 123.7ms TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:54:58,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-05-03 14:54:58,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 214. [2021-05-03 14:54:58,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.9389671361502345) internal successors, (626), 213 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:58,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 626 transitions. [2021-05-03 14:54:58,048 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 626 transitions. Word has length 18 [2021-05-03 14:54:58,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:58,048 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 626 transitions. [2021-05-03 14:54:58,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:58,048 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 626 transitions. [2021-05-03 14:54:58,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:58,048 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:58,048 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:58,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-05-03 14:54:58,249 INFO L428 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:58,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:58,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1980104049, now seen corresponding path program 77 times [2021-05-03 14:54:58,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:58,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457002350] [2021-05-03 14:54:58,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:58,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:58,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:58,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457002350] [2021-05-03 14:54:58,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676371631] [2021-05-03 14:54:58,298 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:58,318 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:54:58,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:58,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:58,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:58,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:58,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:58,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 14:54:58,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383101032] [2021-05-03 14:54:58,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:54:58,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:58,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:54:58,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:54:58,427 INFO L87 Difference]: Start difference. First operand 214 states and 626 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:58,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:58,673 INFO L93 Difference]: Finished difference Result 443 states and 1246 transitions. [2021-05-03 14:54:58,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:58,673 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:58,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:58,674 INFO L225 Difference]: With dead ends: 443 [2021-05-03 14:54:58,674 INFO L226 Difference]: Without dead ends: 420 [2021-05-03 14:54:58,674 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 208.0ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:54:58,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-05-03 14:54:58,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 222. [2021-05-03 14:54:58,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.932126696832579) internal successors, (648), 221 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:58,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 648 transitions. [2021-05-03 14:54:58,677 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 648 transitions. Word has length 18 [2021-05-03 14:54:58,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:58,678 INFO L480 AbstractCegarLoop]: Abstraction has 222 states and 648 transitions. [2021-05-03 14:54:58,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:58,678 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 648 transitions. [2021-05-03 14:54:58,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:58,678 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:58,678 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:58,892 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable425 [2021-05-03 14:54:58,893 INFO L428 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:58,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:58,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1001546605, now seen corresponding path program 78 times [2021-05-03 14:54:58,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:58,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072816547] [2021-05-03 14:54:58,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:58,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:58,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:58,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072816547] [2021-05-03 14:54:58,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277779766] [2021-05-03 14:54:58,939 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:58,959 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 14:54:58,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:54:58,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:58,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:59,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:59,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:59,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 14:54:59,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582122893] [2021-05-03 14:54:59,036 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:54:59,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:59,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:54:59,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:54:59,037 INFO L87 Difference]: Start difference. First operand 222 states and 648 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:59,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:59,245 INFO L93 Difference]: Finished difference Result 427 states and 1216 transitions. [2021-05-03 14:54:59,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:59,245 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:59,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:59,246 INFO L225 Difference]: With dead ends: 427 [2021-05-03 14:54:59,246 INFO L226 Difference]: Without dead ends: 408 [2021-05-03 14:54:59,246 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 184.6ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:54:59,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-05-03 14:54:59,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 212. [2021-05-03 14:54:59,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.924170616113744) internal successors, (617), 211 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:59,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 617 transitions. [2021-05-03 14:54:59,249 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 617 transitions. Word has length 18 [2021-05-03 14:54:59,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:59,250 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 617 transitions. [2021-05-03 14:54:59,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:59,250 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 617 transitions. [2021-05-03 14:54:59,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:59,250 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:59,250 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:54:59,456 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2021-05-03 14:54:59,457 INFO L428 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:54:59,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:54:59,457 INFO L82 PathProgramCache]: Analyzing trace with hash -2120551441, now seen corresponding path program 79 times [2021-05-03 14:54:59,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:54:59,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719136543] [2021-05-03 14:54:59,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:54:59,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:59,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:59,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719136543] [2021-05-03 14:54:59,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379521221] [2021-05-03 14:54:59,525 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:54:59,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:54:59,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:54:59,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:54:59,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:54:59,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:54:59,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-05-03 14:54:59,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548571028] [2021-05-03 14:54:59,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:54:59,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:54:59,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:54:59,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:54:59,627 INFO L87 Difference]: Start difference. First operand 212 states and 617 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:59,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:54:59,883 INFO L93 Difference]: Finished difference Result 424 states and 1183 transitions. [2021-05-03 14:54:59,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:54:59,884 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:54:59,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:54:59,884 INFO L225 Difference]: With dead ends: 424 [2021-05-03 14:54:59,884 INFO L226 Difference]: Without dead ends: 405 [2021-05-03 14:54:59,884 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 239.9ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:54:59,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-05-03 14:54:59,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 217. [2021-05-03 14:54:59,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.9444444444444446) internal successors, (636), 216 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:59,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 636 transitions. [2021-05-03 14:54:59,887 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 636 transitions. Word has length 18 [2021-05-03 14:54:59,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:54:59,888 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 636 transitions. [2021-05-03 14:54:59,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:54:59,888 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 636 transitions. [2021-05-03 14:54:59,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:54:59,888 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:54:59,888 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:00,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-05-03 14:55:00,088 INFO L428 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:00,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:00,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1190390265, now seen corresponding path program 80 times [2021-05-03 14:55:00,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:00,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251427803] [2021-05-03 14:55:00,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:00,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:00,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:00,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251427803] [2021-05-03 14:55:00,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444892369] [2021-05-03 14:55:00,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:00,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:55:00,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:00,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:55:00,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:00,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:00,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:00,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 14:55:00,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636574720] [2021-05-03 14:55:00,265 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:55:00,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:00,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:55:00,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:00,266 INFO L87 Difference]: Start difference. First operand 217 states and 636 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:00,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:00,572 INFO L93 Difference]: Finished difference Result 428 states and 1183 transitions. [2021-05-03 14:55:00,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:55:00,573 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:55:00,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:00,574 INFO L225 Difference]: With dead ends: 428 [2021-05-03 14:55:00,574 INFO L226 Difference]: Without dead ends: 405 [2021-05-03 14:55:00,574 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 284.1ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:55:00,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-05-03 14:55:00,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 215. [2021-05-03 14:55:00,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.939252336448598) internal successors, (629), 214 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:00,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 629 transitions. [2021-05-03 14:55:00,577 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 629 transitions. Word has length 18 [2021-05-03 14:55:00,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:00,577 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 629 transitions. [2021-05-03 14:55:00,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:00,577 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 629 transitions. [2021-05-03 14:55:00,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:55:00,577 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:00,578 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:00,778 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable436,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:00,778 INFO L428 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:00,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:00,778 INFO L82 PathProgramCache]: Analyzing trace with hash 2091884499, now seen corresponding path program 81 times [2021-05-03 14:55:00,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:00,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526097818] [2021-05-03 14:55:00,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:00,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:00,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:00,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526097818] [2021-05-03 14:55:00,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766010796] [2021-05-03 14:55:00,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:00,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 14:55:00,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:00,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:55:00,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:00,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:00,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:00,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-03 14:55:00,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722523821] [2021-05-03 14:55:00,933 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:55:00,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:00,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:55:00,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:55:00,933 INFO L87 Difference]: Start difference. First operand 215 states and 629 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:01,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:01,190 INFO L93 Difference]: Finished difference Result 422 states and 1164 transitions. [2021-05-03 14:55:01,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:55:01,191 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:55:01,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:01,192 INFO L225 Difference]: With dead ends: 422 [2021-05-03 14:55:01,192 INFO L226 Difference]: Without dead ends: 395 [2021-05-03 14:55:01,192 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 248.3ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:55:01,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-05-03 14:55:01,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 213. [2021-05-03 14:55:01,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.9339622641509435) internal successors, (622), 212 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:01,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 622 transitions. [2021-05-03 14:55:01,195 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 622 transitions. Word has length 18 [2021-05-03 14:55:01,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:01,195 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 622 transitions. [2021-05-03 14:55:01,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:01,195 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 622 transitions. [2021-05-03 14:55:01,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:55:01,195 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:01,195 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:01,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2021-05-03 14:55:01,396 INFO L428 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:01,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:01,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1036814989, now seen corresponding path program 82 times [2021-05-03 14:55:01,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:01,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756126913] [2021-05-03 14:55:01,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:01,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:01,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:01,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756126913] [2021-05-03 14:55:01,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894717650] [2021-05-03 14:55:01,472 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:01,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:55:01,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:01,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:55:01,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:01,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:01,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:01,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-05-03 14:55:01,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830767090] [2021-05-03 14:55:01,586 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:55:01,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:01,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:55:01,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:55:01,586 INFO L87 Difference]: Start difference. First operand 213 states and 622 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:01,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:01,848 INFO L93 Difference]: Finished difference Result 441 states and 1207 transitions. [2021-05-03 14:55:01,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:55:01,849 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:55:01,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:01,849 INFO L225 Difference]: With dead ends: 441 [2021-05-03 14:55:01,849 INFO L226 Difference]: Without dead ends: 422 [2021-05-03 14:55:01,849 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 215.4ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:55:01,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-05-03 14:55:01,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 219. [2021-05-03 14:55:01,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.977064220183486) internal successors, (649), 218 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:01,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 649 transitions. [2021-05-03 14:55:01,853 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 649 transitions. Word has length 18 [2021-05-03 14:55:01,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:01,853 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 649 transitions. [2021-05-03 14:55:01,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:01,853 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 649 transitions. [2021-05-03 14:55:01,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:55:01,863 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:01,863 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:02,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable446 [2021-05-03 14:55:02,077 INFO L428 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:02,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:02,077 INFO L82 PathProgramCache]: Analyzing trace with hash -106653813, now seen corresponding path program 83 times [2021-05-03 14:55:02,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:02,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149939591] [2021-05-03 14:55:02,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:02,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:02,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:02,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149939591] [2021-05-03 14:55:02,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022470000] [2021-05-03 14:55:02,156 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:02,178 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:55:02,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:02,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:55:02,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:02,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:02,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:02,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 14:55:02,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701359862] [2021-05-03 14:55:02,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:55:02,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:02,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:55:02,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:02,267 INFO L87 Difference]: Start difference. First operand 219 states and 649 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:02,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:02,494 INFO L93 Difference]: Finished difference Result 445 states and 1207 transitions. [2021-05-03 14:55:02,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:55:02,494 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:55:02,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:02,495 INFO L225 Difference]: With dead ends: 445 [2021-05-03 14:55:02,495 INFO L226 Difference]: Without dead ends: 422 [2021-05-03 14:55:02,495 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 217.2ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:55:02,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-05-03 14:55:02,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 221. [2021-05-03 14:55:02,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.9545454545454546) internal successors, (650), 220 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:02,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 650 transitions. [2021-05-03 14:55:02,498 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 650 transitions. Word has length 18 [2021-05-03 14:55:02,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:02,498 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 650 transitions. [2021-05-03 14:55:02,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:02,498 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 650 transitions. [2021-05-03 14:55:02,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:55:02,499 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:02,499 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:02,699 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable449,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:02,700 INFO L428 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:02,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:02,700 INFO L82 PathProgramCache]: Analyzing trace with hash -766305297, now seen corresponding path program 84 times [2021-05-03 14:55:02,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:02,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656413763] [2021-05-03 14:55:02,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:02,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:02,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:02,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656413763] [2021-05-03 14:55:02,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692262119] [2021-05-03 14:55:02,774 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:02,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 14:55:02,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:02,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:55:02,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:02,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:02,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:02,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-05-03 14:55:02,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857889858] [2021-05-03 14:55:02,916 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:55:02,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:02,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:55:02,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:55:02,916 INFO L87 Difference]: Start difference. First operand 221 states and 650 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:03,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:03,189 INFO L93 Difference]: Finished difference Result 414 states and 1142 transitions. [2021-05-03 14:55:03,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:55:03,189 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 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 [2021-05-03 14:55:03,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:03,190 INFO L225 Difference]: With dead ends: 414 [2021-05-03 14:55:03,190 INFO L226 Difference]: Without dead ends: 395 [2021-05-03 14:55:03,190 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 277.7ms TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:55:03,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-05-03 14:55:03,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 218. [2021-05-03 14:55:03,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.9815668202764978) internal successors, (647), 217 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:03,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 647 transitions. [2021-05-03 14:55:03,194 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 647 transitions. Word has length 18 [2021-05-03 14:55:03,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:03,194 INFO L480 AbstractCegarLoop]: Abstraction has 218 states and 647 transitions. [2021-05-03 14:55:03,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:03,194 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 647 transitions. [2021-05-03 14:55:03,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:55:03,194 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:03,194 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:03,395 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2021-05-03 14:55:03,395 INFO L428 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:03,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:03,395 INFO L82 PathProgramCache]: Analyzing trace with hash -947433745, now seen corresponding path program 85 times [2021-05-03 14:55:03,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:03,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765509128] [2021-05-03 14:55:03,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:03,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:03,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:03,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765509128] [2021-05-03 14:55:03,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889035403] [2021-05-03 14:55:03,485 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:03,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:03,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:55:03,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:03,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:03,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:03,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 14:55:03,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963282813] [2021-05-03 14:55:03,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:55:03,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:03,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:55:03,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:03,607 INFO L87 Difference]: Start difference. First operand 218 states and 647 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:03,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:03,794 INFO L93 Difference]: Finished difference Result 386 states and 1091 transitions. [2021-05-03 14:55:03,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:55:03,795 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:55:03,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:03,795 INFO L225 Difference]: With dead ends: 386 [2021-05-03 14:55:03,795 INFO L226 Difference]: Without dead ends: 367 [2021-05-03 14:55:03,796 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 173.8ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:55:03,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-05-03 14:55:03,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 214. [2021-05-03 14:55:03,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.943661971830986) internal successors, (627), 213 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:03,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 627 transitions. [2021-05-03 14:55:03,799 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 627 transitions. Word has length 18 [2021-05-03 14:55:03,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:03,799 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 627 transitions. [2021-05-03 14:55:03,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:03,799 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 627 transitions. [2021-05-03 14:55:03,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:55:03,799 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:03,799 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:04,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable458,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:04,000 INFO L428 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:04,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:04,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1466240775, now seen corresponding path program 86 times [2021-05-03 14:55:04,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:04,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659315055] [2021-05-03 14:55:04,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:04,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:04,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:04,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659315055] [2021-05-03 14:55:04,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698956874] [2021-05-03 14:55:04,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:04,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:55:04,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:04,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:55:04,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:04,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:04,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:04,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 14:55:04,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738452694] [2021-05-03 14:55:04,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:55:04,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:04,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:55:04,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:55:04,197 INFO L87 Difference]: Start difference. First operand 214 states and 627 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:04,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:04,517 INFO L93 Difference]: Finished difference Result 422 states and 1166 transitions. [2021-05-03 14:55:04,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:55:04,517 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:55:04,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:04,518 INFO L225 Difference]: With dead ends: 422 [2021-05-03 14:55:04,518 INFO L226 Difference]: Without dead ends: 399 [2021-05-03 14:55:04,518 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 319.5ms TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:55:04,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-05-03 14:55:04,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 222. [2021-05-03 14:55:04,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.936651583710407) internal successors, (649), 221 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:04,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 649 transitions. [2021-05-03 14:55:04,522 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 649 transitions. Word has length 18 [2021-05-03 14:55:04,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:04,522 INFO L480 AbstractCegarLoop]: Abstraction has 222 states and 649 transitions. [2021-05-03 14:55:04,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:04,522 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 649 transitions. [2021-05-03 14:55:04,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:55:04,522 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:04,522 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:04,722 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:04,723 INFO L428 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:04,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:04,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1850169077, now seen corresponding path program 87 times [2021-05-03 14:55:04,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:04,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546744101] [2021-05-03 14:55:04,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:04,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:04,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:04,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546744101] [2021-05-03 14:55:04,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92912456] [2021-05-03 14:55:04,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:04,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 14:55:04,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:04,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:55:04,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:04,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:04,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:04,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 14:55:04,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942787336] [2021-05-03 14:55:04,888 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:55:04,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:04,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:55:04,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:04,888 INFO L87 Difference]: Start difference. First operand 222 states and 649 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:05,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:05,111 INFO L93 Difference]: Finished difference Result 406 states and 1136 transitions. [2021-05-03 14:55:05,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:55:05,112 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:55:05,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:05,112 INFO L225 Difference]: With dead ends: 406 [2021-05-03 14:55:05,113 INFO L226 Difference]: Without dead ends: 387 [2021-05-03 14:55:05,113 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 207.6ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:55:05,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-05-03 14:55:05,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 213. [2021-05-03 14:55:05,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.9339622641509435) internal successors, (622), 212 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:05,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 622 transitions. [2021-05-03 14:55:05,116 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 622 transitions. Word has length 18 [2021-05-03 14:55:05,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:05,116 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 622 transitions. [2021-05-03 14:55:05,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:05,116 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 622 transitions. [2021-05-03 14:55:05,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:55:05,116 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:05,116 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:05,317 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-05-03 14:55:05,317 INFO L428 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:05,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:05,317 INFO L82 PathProgramCache]: Analyzing trace with hash -687990825, now seen corresponding path program 88 times [2021-05-03 14:55:05,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:05,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361456183] [2021-05-03 14:55:05,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:05,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:05,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:05,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361456183] [2021-05-03 14:55:05,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799564991] [2021-05-03 14:55:05,380 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:05,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:55:05,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:05,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:55:05,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:05,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:05,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:05,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-03 14:55:05,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414295659] [2021-05-03 14:55:05,501 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:55:05,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:05,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:55:05,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:55:05,501 INFO L87 Difference]: Start difference. First operand 213 states and 622 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:05,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:05,779 INFO L93 Difference]: Finished difference Result 366 states and 1018 transitions. [2021-05-03 14:55:05,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:55:05,780 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:55:05,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:05,780 INFO L225 Difference]: With dead ends: 366 [2021-05-03 14:55:05,780 INFO L226 Difference]: Without dead ends: 339 [2021-05-03 14:55:05,781 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 284.5ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:55:05,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-05-03 14:55:05,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 215. [2021-05-03 14:55:05,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.9299065420560746) internal successors, (627), 214 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:05,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 627 transitions. [2021-05-03 14:55:05,784 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 627 transitions. Word has length 18 [2021-05-03 14:55:05,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:05,784 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 627 transitions. [2021-05-03 14:55:05,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:05,784 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 627 transitions. [2021-05-03 14:55:05,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:55:05,784 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:05,784 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:05,985 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable469 [2021-05-03 14:55:05,985 INFO L428 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:05,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:05,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1068673581, now seen corresponding path program 89 times [2021-05-03 14:55:05,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:05,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132333733] [2021-05-03 14:55:05,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:05,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:06,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:06,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132333733] [2021-05-03 14:55:06,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947419506] [2021-05-03 14:55:06,048 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:06,080 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:55:06,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:06,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:55:06,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:06,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:06,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:06,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 14:55:06,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886962644] [2021-05-03 14:55:06,178 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:55:06,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:06,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:55:06,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:06,178 INFO L87 Difference]: Start difference. First operand 215 states and 627 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:06,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:06,450 INFO L93 Difference]: Finished difference Result 358 states and 1000 transitions. [2021-05-03 14:55:06,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:55:06,450 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:55:06,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:06,451 INFO L225 Difference]: With dead ends: 358 [2021-05-03 14:55:06,451 INFO L226 Difference]: Without dead ends: 335 [2021-05-03 14:55:06,451 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 263.8ms TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:55:06,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-05-03 14:55:06,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 223. [2021-05-03 14:55:06,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.9234234234234235) internal successors, (649), 222 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:06,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 649 transitions. [2021-05-03 14:55:06,454 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 649 transitions. Word has length 18 [2021-05-03 14:55:06,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:06,454 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 649 transitions. [2021-05-03 14:55:06,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:06,454 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 649 transitions. [2021-05-03 14:55:06,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:55:06,454 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:06,454 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:06,654 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable474,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:06,655 INFO L428 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:06,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:06,655 INFO L82 PathProgramCache]: Analyzing trace with hash -90116137, now seen corresponding path program 90 times [2021-05-03 14:55:06,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:06,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981816416] [2021-05-03 14:55:06,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:06,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:06,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:06,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981816416] [2021-05-03 14:55:06,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962667656] [2021-05-03 14:55:06,717 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:06,738 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 14:55:06,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:06,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:55:06,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:06,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:06,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:06,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 14:55:06,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149376291] [2021-05-03 14:55:06,856 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:55:06,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:06,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:55:06,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:06,857 INFO L87 Difference]: Start difference. First operand 223 states and 649 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:07,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:07,136 INFO L93 Difference]: Finished difference Result 333 states and 948 transitions. [2021-05-03 14:55:07,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:55:07,136 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:55:07,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:07,137 INFO L225 Difference]: With dead ends: 333 [2021-05-03 14:55:07,137 INFO L226 Difference]: Without dead ends: 314 [2021-05-03 14:55:07,137 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 272.4ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:55:07,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-05-03 14:55:07,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 212. [2021-05-03 14:55:07,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.924170616113744) internal successors, (617), 211 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:07,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 617 transitions. [2021-05-03 14:55:07,141 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 617 transitions. Word has length 18 [2021-05-03 14:55:07,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:07,141 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 617 transitions. [2021-05-03 14:55:07,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:07,141 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 617 transitions. [2021-05-03 14:55:07,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:07,141 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:07,141 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:07,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable479 [2021-05-03 14:55:07,357 INFO L428 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:07,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:07,357 INFO L82 PathProgramCache]: Analyzing trace with hash -41149670, now seen corresponding path program 1 times [2021-05-03 14:55:07,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:07,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794373331] [2021-05-03 14:55:07,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:07,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:07,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:07,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794373331] [2021-05-03 14:55:07,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845367795] [2021-05-03 14:55:07,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:07,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:07,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:07,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:07,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:07,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:07,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 14:55:07,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096042831] [2021-05-03 14:55:07,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:55:07,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:07,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:55:07,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:55:07,478 INFO L87 Difference]: Start difference. First operand 212 states and 617 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:07,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:07,580 INFO L93 Difference]: Finished difference Result 306 states and 874 transitions. [2021-05-03 14:55:07,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:07,581 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:07,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:07,581 INFO L225 Difference]: With dead ends: 306 [2021-05-03 14:55:07,581 INFO L226 Difference]: Without dead ends: 282 [2021-05-03 14:55:07,582 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 84.9ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:55:07,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-05-03 14:55:07,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 219. [2021-05-03 14:55:07,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.926605504587156) internal successors, (638), 218 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:07,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 638 transitions. [2021-05-03 14:55:07,585 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 638 transitions. Word has length 19 [2021-05-03 14:55:07,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:07,585 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 638 transitions. [2021-05-03 14:55:07,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:07,585 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 638 transitions. [2021-05-03 14:55:07,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:07,585 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:07,585 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:07,785 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:07,786 INFO L428 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:07,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:07,786 INFO L82 PathProgramCache]: Analyzing trace with hash -125197293, now seen corresponding path program 1 times [2021-05-03 14:55:07,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:07,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115566179] [2021-05-03 14:55:07,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:07,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:07,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:07,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115566179] [2021-05-03 14:55:07,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023920827] [2021-05-03 14:55:07,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:07,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:07,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:07,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:07,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:07,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:07,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-03 14:55:07,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204895872] [2021-05-03 14:55:07,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:55:07,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:07,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:55:07,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:55:07,896 INFO L87 Difference]: Start difference. First operand 219 states and 638 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:08,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:08,012 INFO L93 Difference]: Finished difference Result 359 states and 1037 transitions. [2021-05-03 14:55:08,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:08,012 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:08,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:08,013 INFO L225 Difference]: With dead ends: 359 [2021-05-03 14:55:08,013 INFO L226 Difference]: Without dead ends: 359 [2021-05-03 14:55:08,013 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 84.0ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:55:08,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-05-03 14:55:08,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 230. [2021-05-03 14:55:08,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.978165938864629) internal successors, (682), 229 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:08,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 682 transitions. [2021-05-03 14:55:08,016 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 682 transitions. Word has length 19 [2021-05-03 14:55:08,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:08,016 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 682 transitions. [2021-05-03 14:55:08,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:08,016 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 682 transitions. [2021-05-03 14:55:08,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:08,017 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:08,017 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:08,234 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable485 [2021-05-03 14:55:08,234 INFO L428 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:08,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:08,234 INFO L82 PathProgramCache]: Analyzing trace with hash -470014277, now seen corresponding path program 2 times [2021-05-03 14:55:08,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:08,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020089277] [2021-05-03 14:55:08,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:08,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:08,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:08,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020089277] [2021-05-03 14:55:08,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020211724] [2021-05-03 14:55:08,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:08,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:55:08,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:08,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:08,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:08,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:08,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:08,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 14:55:08,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552531207] [2021-05-03 14:55:08,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:55:08,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:08,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:55:08,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:55:08,375 INFO L87 Difference]: Start difference. First operand 230 states and 682 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:08,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:08,490 INFO L93 Difference]: Finished difference Result 371 states and 1061 transitions. [2021-05-03 14:55:08,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:08,490 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:08,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:08,491 INFO L225 Difference]: With dead ends: 371 [2021-05-03 14:55:08,491 INFO L226 Difference]: Without dead ends: 363 [2021-05-03 14:55:08,491 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 82.7ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:55:08,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-05-03 14:55:08,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 246. [2021-05-03 14:55:08,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 3.012244897959184) internal successors, (738), 245 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:08,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 738 transitions. [2021-05-03 14:55:08,495 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 738 transitions. Word has length 19 [2021-05-03 14:55:08,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:08,495 INFO L480 AbstractCegarLoop]: Abstraction has 246 states and 738 transitions. [2021-05-03 14:55:08,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:08,495 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 738 transitions. [2021-05-03 14:55:08,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:08,495 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:08,495 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:08,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2021-05-03 14:55:08,705 INFO L428 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:08,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:08,705 INFO L82 PathProgramCache]: Analyzing trace with hash -438067324, now seen corresponding path program 2 times [2021-05-03 14:55:08,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:08,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016759956] [2021-05-03 14:55:08,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:08,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:08,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:08,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016759956] [2021-05-03 14:55:08,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145640797] [2021-05-03 14:55:08,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:08,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:55:08,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:08,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:08,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:08,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:08,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:08,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 14:55:08,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671199181] [2021-05-03 14:55:08,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:55:08,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:08,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:55:08,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:55:08,862 INFO L87 Difference]: Start difference. First operand 246 states and 738 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:08,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:08,998 INFO L93 Difference]: Finished difference Result 360 states and 1044 transitions. [2021-05-03 14:55:08,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:08,998 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:08,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:08,999 INFO L225 Difference]: With dead ends: 360 [2021-05-03 14:55:08,999 INFO L226 Difference]: Without dead ends: 360 [2021-05-03 14:55:08,999 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 105.7ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:55:09,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-05-03 14:55:09,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 250. [2021-05-03 14:55:09,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 3.0281124497991967) internal successors, (754), 249 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:09,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 754 transitions. [2021-05-03 14:55:09,003 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 754 transitions. Word has length 19 [2021-05-03 14:55:09,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:09,003 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 754 transitions. [2021-05-03 14:55:09,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:09,003 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 754 transitions. [2021-05-03 14:55:09,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:09,003 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:09,003 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:09,204 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-05-03 14:55:09,205 INFO L428 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:09,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:09,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1984931892, now seen corresponding path program 3 times [2021-05-03 14:55:09,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:09,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480254588] [2021-05-03 14:55:09,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:09,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:09,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:09,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480254588] [2021-05-03 14:55:09,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209499556] [2021-05-03 14:55:09,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:09,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 14:55:09,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:09,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:09,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:09,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:09,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:09,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 14:55:09,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585008270] [2021-05-03 14:55:09,313 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:55:09,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:09,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:55:09,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:55:09,314 INFO L87 Difference]: Start difference. First operand 250 states and 754 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:09,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:09,406 INFO L93 Difference]: Finished difference Result 330 states and 966 transitions. [2021-05-03 14:55:09,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:09,406 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:09,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:09,407 INFO L225 Difference]: With dead ends: 330 [2021-05-03 14:55:09,407 INFO L226 Difference]: Without dead ends: 321 [2021-05-03 14:55:09,407 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 78.4ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:55:09,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-05-03 14:55:09,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 250. [2021-05-03 14:55:09,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 3.0120481927710845) internal successors, (750), 249 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:09,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 750 transitions. [2021-05-03 14:55:09,410 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 750 transitions. Word has length 19 [2021-05-03 14:55:09,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:09,410 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 750 transitions. [2021-05-03 14:55:09,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:09,410 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 750 transitions. [2021-05-03 14:55:09,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:09,410 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:09,410 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:09,610 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable490 [2021-05-03 14:55:09,611 INFO L428 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:09,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:09,611 INFO L82 PathProgramCache]: Analyzing trace with hash 9270399, now seen corresponding path program 3 times [2021-05-03 14:55:09,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:09,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031994100] [2021-05-03 14:55:09,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:09,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:09,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:09,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031994100] [2021-05-03 14:55:09,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261453737] [2021-05-03 14:55:09,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:55:09,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 14:55:09,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:09,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:09,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:09,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:09,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:09,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 14:55:09,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615005970] [2021-05-03 14:55:09,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:55:09,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:09,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:55:09,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:55:09,731 INFO L87 Difference]: Start difference. First operand 250 states and 750 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:09,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:09,851 INFO L93 Difference]: Finished difference Result 351 states and 1024 transitions. [2021-05-03 14:55:09,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:09,852 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:09,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:09,852 INFO L225 Difference]: With dead ends: 351 [2021-05-03 14:55:09,853 INFO L226 Difference]: Without dead ends: 351 [2021-05-03 14:55:09,853 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 80.0ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:55:09,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-05-03 14:55:09,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 238. [2021-05-03 14:55:09,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.9957805907172994) internal successors, (710), 237 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:09,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 710 transitions. [2021-05-03 14:55:09,856 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 710 transitions. Word has length 19 [2021-05-03 14:55:09,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:09,856 INFO L480 AbstractCegarLoop]: Abstraction has 238 states and 710 transitions. [2021-05-03 14:55:09,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:09,856 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 710 transitions. [2021-05-03 14:55:09,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:09,856 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:09,856 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:10,057 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:10,057 INFO L428 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:10,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:10,057 INFO L82 PathProgramCache]: Analyzing trace with hash 916771049, now seen corresponding path program 4 times [2021-05-03 14:55:10,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:10,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389225653] [2021-05-03 14:55:10,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:10,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:10,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:10,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389225653] [2021-05-03 14:55:10,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418785100] [2021-05-03 14:55:10,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:10,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:55:10,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:10,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:10,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:10,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:10,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:10,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 14:55:10,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247490988] [2021-05-03 14:55:10,161 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:55:10,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:10,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:55:10,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:55:10,162 INFO L87 Difference]: Start difference. First operand 238 states and 710 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:10,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:10,264 INFO L93 Difference]: Finished difference Result 321 states and 937 transitions. [2021-05-03 14:55:10,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:10,265 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:10,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:10,265 INFO L225 Difference]: With dead ends: 321 [2021-05-03 14:55:10,265 INFO L226 Difference]: Without dead ends: 305 [2021-05-03 14:55:10,266 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 73.7ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:55:10,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-05-03 14:55:10,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 242. [2021-05-03 14:55:10,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.995850622406639) internal successors, (722), 241 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:10,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 722 transitions. [2021-05-03 14:55:10,268 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 722 transitions. Word has length 19 [2021-05-03 14:55:10,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:10,268 INFO L480 AbstractCegarLoop]: Abstraction has 242 states and 722 transitions. [2021-05-03 14:55:10,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:10,269 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 722 transitions. [2021-05-03 14:55:10,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:10,269 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:10,269 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:10,469 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable494,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:10,470 INFO L428 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:10,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:10,470 INFO L82 PathProgramCache]: Analyzing trace with hash 178079258, now seen corresponding path program 4 times [2021-05-03 14:55:10,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:10,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768729098] [2021-05-03 14:55:10,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:10,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:10,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:10,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768729098] [2021-05-03 14:55:10,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548925737] [2021-05-03 14:55:10,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:10,527 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:55:10,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:10,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:10,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:10,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:10,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:10,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-03 14:55:10,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716347296] [2021-05-03 14:55:10,573 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:55:10,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:10,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:55:10,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:55:10,574 INFO L87 Difference]: Start difference. First operand 242 states and 722 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:10,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:10,683 INFO L93 Difference]: Finished difference Result 379 states and 1110 transitions. [2021-05-03 14:55:10,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:10,684 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:10,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:10,684 INFO L225 Difference]: With dead ends: 379 [2021-05-03 14:55:10,684 INFO L226 Difference]: Without dead ends: 379 [2021-05-03 14:55:10,684 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 74.0ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:55:10,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-05-03 14:55:10,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 246. [2021-05-03 14:55:10,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 3.012244897959184) internal successors, (738), 245 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:10,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 738 transitions. [2021-05-03 14:55:10,687 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 738 transitions. Word has length 19 [2021-05-03 14:55:10,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:10,688 INFO L480 AbstractCegarLoop]: Abstraction has 246 states and 738 transitions. [2021-05-03 14:55:10,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:10,688 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 738 transitions. [2021-05-03 14:55:10,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:10,688 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:10,688 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:10,888 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2021-05-03 14:55:10,889 INFO L428 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:10,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:10,889 INFO L82 PathProgramCache]: Analyzing trace with hash 117731045, now seen corresponding path program 5 times [2021-05-03 14:55:10,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:10,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946955423] [2021-05-03 14:55:10,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:10,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:10,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:10,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946955423] [2021-05-03 14:55:10,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716618905] [2021-05-03 14:55:10,922 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:10,945 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:55:10,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:10,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:10,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:11,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:11,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:11,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 14:55:11,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438058132] [2021-05-03 14:55:11,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:55:11,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:11,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:55:11,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:55:11,019 INFO L87 Difference]: Start difference. First operand 246 states and 738 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:11,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:11,134 INFO L93 Difference]: Finished difference Result 372 states and 1080 transitions. [2021-05-03 14:55:11,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:11,135 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:11,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:11,135 INFO L225 Difference]: With dead ends: 372 [2021-05-03 14:55:11,135 INFO L226 Difference]: Without dead ends: 364 [2021-05-03 14:55:11,135 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 93.2ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:55:11,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-05-03 14:55:11,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 262. [2021-05-03 14:55:11,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 3.0421455938697317) internal successors, (794), 261 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:11,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 794 transitions. [2021-05-03 14:55:11,139 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 794 transitions. Word has length 19 [2021-05-03 14:55:11,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:11,139 INFO L480 AbstractCegarLoop]: Abstraction has 262 states and 794 transitions. [2021-05-03 14:55:11,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:11,139 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 794 transitions. [2021-05-03 14:55:11,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:11,139 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:11,140 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:11,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-05-03 14:55:11,340 INFO L428 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:11,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:11,340 INFO L82 PathProgramCache]: Analyzing trace with hash 149677998, now seen corresponding path program 5 times [2021-05-03 14:55:11,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:11,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997561698] [2021-05-03 14:55:11,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:11,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:11,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:11,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997561698] [2021-05-03 14:55:11,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501896258] [2021-05-03 14:55:11,395 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:11,420 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:55:11,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:11,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:11,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:11,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:11,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:11,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 14:55:11,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004610968] [2021-05-03 14:55:11,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:55:11,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:11,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:55:11,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:55:11,478 INFO L87 Difference]: Start difference. First operand 262 states and 794 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:11,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:11,600 INFO L93 Difference]: Finished difference Result 408 states and 1192 transitions. [2021-05-03 14:55:11,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:11,601 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:11,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:11,601 INFO L225 Difference]: With dead ends: 408 [2021-05-03 14:55:11,601 INFO L226 Difference]: Without dead ends: 408 [2021-05-03 14:55:11,602 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 101.7ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:55:11,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-05-03 14:55:11,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 262. [2021-05-03 14:55:11,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 3.0421455938697317) internal successors, (794), 261 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:11,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 794 transitions. [2021-05-03 14:55:11,605 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 794 transitions. Word has length 19 [2021-05-03 14:55:11,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:11,605 INFO L480 AbstractCegarLoop]: Abstraction has 262 states and 794 transitions. [2021-05-03 14:55:11,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:11,605 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 794 transitions. [2021-05-03 14:55:11,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:11,606 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:11,606 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:11,806 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable501 [2021-05-03 14:55:11,806 INFO L428 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:11,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:11,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1722290082, now seen corresponding path program 6 times [2021-05-03 14:55:11,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:11,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500882809] [2021-05-03 14:55:11,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:11,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:11,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:11,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500882809] [2021-05-03 14:55:11,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922530322] [2021-05-03 14:55:11,838 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:11,861 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 14:55:11,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:11,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:11,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:11,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:11,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:11,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 14:55:11,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120274320] [2021-05-03 14:55:11,914 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:55:11,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:11,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:55:11,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:55:11,914 INFO L87 Difference]: Start difference. First operand 262 states and 794 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:12,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:12,022 INFO L93 Difference]: Finished difference Result 354 states and 1042 transitions. [2021-05-03 14:55:12,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:12,022 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:12,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:12,023 INFO L225 Difference]: With dead ends: 354 [2021-05-03 14:55:12,023 INFO L226 Difference]: Without dead ends: 345 [2021-05-03 14:55:12,023 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 85.8ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:55:12,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-05-03 14:55:12,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 262. [2021-05-03 14:55:12,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 3.0268199233716473) internal successors, (790), 261 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:12,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 790 transitions. [2021-05-03 14:55:12,026 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 790 transitions. Word has length 19 [2021-05-03 14:55:12,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:12,026 INFO L480 AbstractCegarLoop]: Abstraction has 262 states and 790 transitions. [2021-05-03 14:55:12,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:12,026 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 790 transitions. [2021-05-03 14:55:12,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:12,027 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:12,027 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:12,227 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable502,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:12,227 INFO L428 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:12,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:12,227 INFO L82 PathProgramCache]: Analyzing trace with hash 597015721, now seen corresponding path program 6 times [2021-05-03 14:55:12,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:12,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627090428] [2021-05-03 14:55:12,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:12,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:12,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:12,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627090428] [2021-05-03 14:55:12,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031546787] [2021-05-03 14:55:12,265 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:12,287 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 14:55:12,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:12,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:12,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:12,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:12,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:12,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 14:55:12,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126898612] [2021-05-03 14:55:12,355 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:55:12,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:12,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:55:12,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:55:12,355 INFO L87 Difference]: Start difference. First operand 262 states and 790 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:12,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:12,488 INFO L93 Difference]: Finished difference Result 326 states and 967 transitions. [2021-05-03 14:55:12,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:12,488 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:12,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:12,489 INFO L225 Difference]: With dead ends: 326 [2021-05-03 14:55:12,489 INFO L226 Difference]: Without dead ends: 326 [2021-05-03 14:55:12,489 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 102.4ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:55:12,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-05-03 14:55:12,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 246. [2021-05-03 14:55:12,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 3.012244897959184) internal successors, (738), 245 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:12,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 738 transitions. [2021-05-03 14:55:12,492 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 738 transitions. Word has length 19 [2021-05-03 14:55:12,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:12,493 INFO L480 AbstractCegarLoop]: Abstraction has 246 states and 738 transitions. [2021-05-03 14:55:12,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:12,493 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 738 transitions. [2021-05-03 14:55:12,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:12,493 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:12,493 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:12,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable505 [2021-05-03 14:55:12,701 INFO L428 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:12,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:12,701 INFO L82 PathProgramCache]: Analyzing trace with hash 132155580, now seen corresponding path program 7 times [2021-05-03 14:55:12,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:12,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825056646] [2021-05-03 14:55:12,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:12,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:12,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:12,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825056646] [2021-05-03 14:55:12,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534597276] [2021-05-03 14:55:12,736 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:12,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:12,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:12,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:12,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:12,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:12,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 14:55:12,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193302828] [2021-05-03 14:55:12,823 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:55:12,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:12,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:55:12,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:55:12,823 INFO L87 Difference]: Start difference. First operand 246 states and 738 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:12,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:12,925 INFO L93 Difference]: Finished difference Result 492 states and 1411 transitions. [2021-05-03 14:55:12,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:12,926 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:12,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:12,926 INFO L225 Difference]: With dead ends: 492 [2021-05-03 14:55:12,926 INFO L226 Difference]: Without dead ends: 468 [2021-05-03 14:55:12,926 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 82.6ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:55:12,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-05-03 14:55:12,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 255. [2021-05-03 14:55:12,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 3.0196850393700787) internal successors, (767), 254 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:12,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 767 transitions. [2021-05-03 14:55:12,930 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 767 transitions. Word has length 19 [2021-05-03 14:55:12,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:12,930 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 767 transitions. [2021-05-03 14:55:12,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:12,930 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 767 transitions. [2021-05-03 14:55:12,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:12,931 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:12,931 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:13,131 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable506,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:13,131 INFO L428 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:13,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:13,131 INFO L82 PathProgramCache]: Analyzing trace with hash 48107957, now seen corresponding path program 7 times [2021-05-03 14:55:13,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:13,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055367100] [2021-05-03 14:55:13,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:13,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:13,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:13,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055367100] [2021-05-03 14:55:13,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660805409] [2021-05-03 14:55:13,172 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:13,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:13,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:13,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:13,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:13,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:13,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-03 14:55:13,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972710230] [2021-05-03 14:55:13,245 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:55:13,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:13,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:55:13,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:55:13,245 INFO L87 Difference]: Start difference. First operand 255 states and 767 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:13,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:13,356 INFO L93 Difference]: Finished difference Result 608 states and 1788 transitions. [2021-05-03 14:55:13,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:13,357 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:13,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:13,357 INFO L225 Difference]: With dead ends: 608 [2021-05-03 14:55:13,357 INFO L226 Difference]: Without dead ends: 608 [2021-05-03 14:55:13,358 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 68.1ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:13,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-05-03 14:55:13,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 264. [2021-05-03 14:55:13,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 3.053231939163498) internal successors, (803), 263 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:13,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 803 transitions. [2021-05-03 14:55:13,362 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 803 transitions. Word has length 19 [2021-05-03 14:55:13,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:13,362 INFO L480 AbstractCegarLoop]: Abstraction has 264 states and 803 transitions. [2021-05-03 14:55:13,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:13,362 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 803 transitions. [2021-05-03 14:55:13,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:13,363 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:13,363 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:13,563 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable509,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:13,563 INFO L428 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:13,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:13,563 INFO L82 PathProgramCache]: Analyzing trace with hash -296709027, now seen corresponding path program 8 times [2021-05-03 14:55:13,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:13,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041488187] [2021-05-03 14:55:13,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:13,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:13,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:13,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041488187] [2021-05-03 14:55:13,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322907334] [2021-05-03 14:55:13,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:13,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:55:13,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:13,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:13,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:13,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:13,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:13,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 14:55:13,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235822483] [2021-05-03 14:55:13,682 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:55:13,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:13,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:55:13,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:55:13,682 INFO L87 Difference]: Start difference. First operand 264 states and 803 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:13,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:13,790 INFO L93 Difference]: Finished difference Result 554 states and 1618 transitions. [2021-05-03 14:55:13,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:13,791 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:13,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:13,792 INFO L225 Difference]: With dead ends: 554 [2021-05-03 14:55:13,792 INFO L226 Difference]: Without dead ends: 546 [2021-05-03 14:55:13,792 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 72.8ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:55:13,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-05-03 14:55:13,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 280. [2021-05-03 14:55:13,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 3.078853046594982) internal successors, (859), 279 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:13,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 859 transitions. [2021-05-03 14:55:13,796 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 859 transitions. Word has length 19 [2021-05-03 14:55:13,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:13,796 INFO L480 AbstractCegarLoop]: Abstraction has 280 states and 859 transitions. [2021-05-03 14:55:13,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:13,796 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 859 transitions. [2021-05-03 14:55:13,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:13,796 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:13,796 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:13,997 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable510,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:13,997 INFO L428 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:13,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:13,997 INFO L82 PathProgramCache]: Analyzing trace with hash -264762074, now seen corresponding path program 8 times [2021-05-03 14:55:13,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:13,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478728959] [2021-05-03 14:55:13,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:13,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:14,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:14,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478728959] [2021-05-03 14:55:14,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56907664] [2021-05-03 14:55:14,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:14,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:55:14,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:14,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:14,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:14,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:14,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:14,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:55:14,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700322433] [2021-05-03 14:55:14,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:55:14,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:14,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:55:14,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:14,131 INFO L87 Difference]: Start difference. First operand 280 states and 859 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:14,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:14,247 INFO L93 Difference]: Finished difference Result 521 states and 1530 transitions. [2021-05-03 14:55:14,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:14,248 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:14,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:14,249 INFO L225 Difference]: With dead ends: 521 [2021-05-03 14:55:14,249 INFO L226 Difference]: Without dead ends: 521 [2021-05-03 14:55:14,249 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 98.7ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:55:14,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-05-03 14:55:14,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 280. [2021-05-03 14:55:14,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 3.078853046594982) internal successors, (859), 279 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:14,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 859 transitions. [2021-05-03 14:55:14,253 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 859 transitions. Word has length 19 [2021-05-03 14:55:14,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:14,253 INFO L480 AbstractCegarLoop]: Abstraction has 280 states and 859 transitions. [2021-05-03 14:55:14,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:14,253 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 859 transitions. [2021-05-03 14:55:14,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:14,254 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:14,254 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:14,454 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable513 [2021-05-03 14:55:14,454 INFO L428 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:14,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:14,455 INFO L82 PathProgramCache]: Analyzing trace with hash -2136730154, now seen corresponding path program 9 times [2021-05-03 14:55:14,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:14,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353394305] [2021-05-03 14:55:14,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:14,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:14,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:14,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353394305] [2021-05-03 14:55:14,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984302201] [2021-05-03 14:55:14,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:14,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 14:55:14,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:14,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:14,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:14,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:14,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:14,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:55:14,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476899344] [2021-05-03 14:55:14,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:55:14,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:14,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:55:14,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:14,628 INFO L87 Difference]: Start difference. First operand 280 states and 859 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:14,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:14,757 INFO L93 Difference]: Finished difference Result 518 states and 1507 transitions. [2021-05-03 14:55:14,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:14,757 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:14,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:14,758 INFO L225 Difference]: With dead ends: 518 [2021-05-03 14:55:14,758 INFO L226 Difference]: Without dead ends: 509 [2021-05-03 14:55:14,758 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 110.1ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:55:14,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-05-03 14:55:14,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 280. [2021-05-03 14:55:14,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 3.064516129032258) internal successors, (855), 279 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:14,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 855 transitions. [2021-05-03 14:55:14,762 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 855 transitions. Word has length 19 [2021-05-03 14:55:14,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:14,762 INFO L480 AbstractCegarLoop]: Abstraction has 280 states and 855 transitions. [2021-05-03 14:55:14,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:14,763 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 855 transitions. [2021-05-03 14:55:14,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:14,763 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:14,763 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:14,972 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable514,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:14,973 INFO L428 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:14,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:14,973 INFO L82 PathProgramCache]: Analyzing trace with hash 182575649, now seen corresponding path program 9 times [2021-05-03 14:55:14,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:14,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49604351] [2021-05-03 14:55:14,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:14,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:15,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:15,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49604351] [2021-05-03 14:55:15,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941789541] [2021-05-03 14:55:15,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:15,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 14:55:15,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:15,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:15,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:15,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:15,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:15,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 14:55:15,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567225160] [2021-05-03 14:55:15,096 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:55:15,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:15,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:55:15,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:55:15,096 INFO L87 Difference]: Start difference. First operand 280 states and 855 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:15,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:15,208 INFO L93 Difference]: Finished difference Result 572 states and 1674 transitions. [2021-05-03 14:55:15,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:15,209 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:15,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:15,209 INFO L225 Difference]: With dead ends: 572 [2021-05-03 14:55:15,210 INFO L226 Difference]: Without dead ends: 572 [2021-05-03 14:55:15,210 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 81.6ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:55:15,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-05-03 14:55:15,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 269. [2021-05-03 14:55:15,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 3.0671641791044775) internal successors, (822), 268 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:15,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 822 transitions. [2021-05-03 14:55:15,214 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 822 transitions. Word has length 19 [2021-05-03 14:55:15,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:15,214 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 822 transitions. [2021-05-03 14:55:15,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:15,214 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 822 transitions. [2021-05-03 14:55:15,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:15,214 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:15,214 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:15,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable517,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:15,424 INFO L428 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:15,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:15,425 INFO L82 PathProgramCache]: Analyzing trace with hash -12394796, now seen corresponding path program 10 times [2021-05-03 14:55:15,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:15,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005083334] [2021-05-03 14:55:15,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:15,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:15,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:15,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005083334] [2021-05-03 14:55:15,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:15,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:15,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995077520] [2021-05-03 14:55:15,466 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:15,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:15,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:15,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:15,466 INFO L87 Difference]: Start difference. First operand 269 states and 822 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:15,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:15,594 INFO L93 Difference]: Finished difference Result 413 states and 1194 transitions. [2021-05-03 14:55:15,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:15,594 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:15,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:15,595 INFO L225 Difference]: With dead ends: 413 [2021-05-03 14:55:15,595 INFO L226 Difference]: Without dead ends: 389 [2021-05-03 14:55:15,595 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 94.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:15,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-05-03 14:55:15,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 273. [2021-05-03 14:55:15,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 3.0441176470588234) internal successors, (828), 272 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:15,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 828 transitions. [2021-05-03 14:55:15,598 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 828 transitions. Word has length 19 [2021-05-03 14:55:15,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:15,599 INFO L480 AbstractCegarLoop]: Abstraction has 273 states and 828 transitions. [2021-05-03 14:55:15,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:15,599 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 828 transitions. [2021-05-03 14:55:15,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:15,599 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:15,599 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:15,599 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable518 [2021-05-03 14:55:15,599 INFO L428 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:15,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:15,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1941255398, now seen corresponding path program 11 times [2021-05-03 14:55:15,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:15,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554092798] [2021-05-03 14:55:15,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:15,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:15,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:15,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554092798] [2021-05-03 14:55:15,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:15,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:15,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347629309] [2021-05-03 14:55:15,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:15,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:15,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:15,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:15,636 INFO L87 Difference]: Start difference. First operand 273 states and 828 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:15,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:15,765 INFO L93 Difference]: Finished difference Result 397 states and 1148 transitions. [2021-05-03 14:55:15,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:15,765 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:15,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:15,766 INFO L225 Difference]: With dead ends: 397 [2021-05-03 14:55:15,766 INFO L226 Difference]: Without dead ends: 391 [2021-05-03 14:55:15,766 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 100.4ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:15,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-05-03 14:55:15,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 283. [2021-05-03 14:55:15,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 3.024822695035461) internal successors, (853), 282 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:15,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 853 transitions. [2021-05-03 14:55:15,770 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 853 transitions. Word has length 19 [2021-05-03 14:55:15,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:15,770 INFO L480 AbstractCegarLoop]: Abstraction has 283 states and 853 transitions. [2021-05-03 14:55:15,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:15,770 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 853 transitions. [2021-05-03 14:55:15,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:15,770 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:15,770 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:15,770 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable519 [2021-05-03 14:55:15,770 INFO L428 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:15,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:15,771 INFO L82 PathProgramCache]: Analyzing trace with hash -449594866, now seen corresponding path program 12 times [2021-05-03 14:55:15,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:15,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061388430] [2021-05-03 14:55:15,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:15,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:15,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:15,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061388430] [2021-05-03 14:55:15,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:15,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:15,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423073189] [2021-05-03 14:55:15,809 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:15,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:15,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:15,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:15,810 INFO L87 Difference]: Start difference. First operand 283 states and 853 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:15,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:15,940 INFO L93 Difference]: Finished difference Result 361 states and 1065 transitions. [2021-05-03 14:55:15,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:15,941 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:15,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:15,941 INFO L225 Difference]: With dead ends: 361 [2021-05-03 14:55:15,941 INFO L226 Difference]: Without dead ends: 346 [2021-05-03 14:55:15,941 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 108.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:15,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-05-03 14:55:15,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 269. [2021-05-03 14:55:15,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 3.0597014925373136) internal successors, (820), 268 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:15,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 820 transitions. [2021-05-03 14:55:15,945 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 820 transitions. Word has length 19 [2021-05-03 14:55:15,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:15,945 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 820 transitions. [2021-05-03 14:55:15,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:15,945 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 820 transitions. [2021-05-03 14:55:15,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:15,945 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:15,945 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:15,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable520 [2021-05-03 14:55:15,945 INFO L428 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:15,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:15,946 INFO L82 PathProgramCache]: Analyzing trace with hash -405487539, now seen corresponding path program 10 times [2021-05-03 14:55:15,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:15,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736765982] [2021-05-03 14:55:15,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:15,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:16,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:16,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736765982] [2021-05-03 14:55:16,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170404280] [2021-05-03 14:55:16,000 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:16,026 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:55:16,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:16,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:16,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:16,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:16,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:16,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-03 14:55:16,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972684833] [2021-05-03 14:55:16,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:55:16,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:16,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:55:16,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:55:16,074 INFO L87 Difference]: Start difference. First operand 269 states and 820 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:16,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:16,191 INFO L93 Difference]: Finished difference Result 531 states and 1547 transitions. [2021-05-03 14:55:16,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:16,192 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:16,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:16,193 INFO L225 Difference]: With dead ends: 531 [2021-05-03 14:55:16,193 INFO L226 Difference]: Without dead ends: 531 [2021-05-03 14:55:16,193 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 70.4ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:16,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-05-03 14:55:16,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 254. [2021-05-03 14:55:16,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 3.0118577075098814) internal successors, (762), 253 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:16,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 762 transitions. [2021-05-03 14:55:16,197 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 762 transitions. Word has length 19 [2021-05-03 14:55:16,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:16,197 INFO L480 AbstractCegarLoop]: Abstraction has 254 states and 762 transitions. [2021-05-03 14:55:16,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:16,197 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 762 transitions. [2021-05-03 14:55:16,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:16,197 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:16,198 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:16,407 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable521 [2021-05-03 14:55:16,407 INFO L428 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:16,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:16,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1305660447, now seen corresponding path program 11 times [2021-05-03 14:55:16,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:16,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688573954] [2021-05-03 14:55:16,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:16,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:16,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:16,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688573954] [2021-05-03 14:55:16,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496950439] [2021-05-03 14:55:16,443 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:16,467 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:55:16,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:16,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:16,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:16,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:16,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:16,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 14:55:16,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701280253] [2021-05-03 14:55:16,528 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:55:16,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:16,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:55:16,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:55:16,528 INFO L87 Difference]: Start difference. First operand 254 states and 762 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:16,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:16,637 INFO L93 Difference]: Finished difference Result 470 states and 1356 transitions. [2021-05-03 14:55:16,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:16,638 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:16,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:16,639 INFO L225 Difference]: With dead ends: 470 [2021-05-03 14:55:16,639 INFO L226 Difference]: Without dead ends: 464 [2021-05-03 14:55:16,639 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 80.8ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:55:16,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-05-03 14:55:16,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 266. [2021-05-03 14:55:16,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 3.0226415094339623) internal successors, (801), 265 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:16,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 801 transitions. [2021-05-03 14:55:16,648 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 801 transitions. Word has length 19 [2021-05-03 14:55:16,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:16,648 INFO L480 AbstractCegarLoop]: Abstraction has 266 states and 801 transitions. [2021-05-03 14:55:16,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:16,648 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 801 transitions. [2021-05-03 14:55:16,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:16,649 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:16,649 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:16,861 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable522,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:16,861 INFO L428 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:16,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:16,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1773947229, now seen corresponding path program 12 times [2021-05-03 14:55:16,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:16,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730220894] [2021-05-03 14:55:16,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:16,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:16,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:16,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730220894] [2021-05-03 14:55:16,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046970639] [2021-05-03 14:55:16,898 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:16,926 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 14:55:16,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:16,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:16,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:16,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:16,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:16,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 14:55:16,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15588681] [2021-05-03 14:55:16,986 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:55:16,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:16,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:55:16,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:55:16,987 INFO L87 Difference]: Start difference. First operand 266 states and 801 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:17,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:17,098 INFO L93 Difference]: Finished difference Result 448 states and 1309 transitions. [2021-05-03 14:55:17,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:17,098 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:17,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:17,099 INFO L225 Difference]: With dead ends: 448 [2021-05-03 14:55:17,099 INFO L226 Difference]: Without dead ends: 448 [2021-05-03 14:55:17,099 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 83.6ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:55:17,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-05-03 14:55:17,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 251. [2021-05-03 14:55:17,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 3.024) internal successors, (756), 250 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:17,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 756 transitions. [2021-05-03 14:55:17,103 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 756 transitions. Word has length 19 [2021-05-03 14:55:17,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:17,103 INFO L480 AbstractCegarLoop]: Abstraction has 251 states and 756 transitions. [2021-05-03 14:55:17,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:17,103 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 756 transitions. [2021-05-03 14:55:17,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:17,103 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:17,110 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:17,318 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable525,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:17,318 INFO L428 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:17,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:17,318 INFO L82 PathProgramCache]: Analyzing trace with hash -964970507, now seen corresponding path program 13 times [2021-05-03 14:55:17,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:17,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441585324] [2021-05-03 14:55:17,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:17,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:17,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:17,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441585324] [2021-05-03 14:55:17,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:17,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:17,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291852445] [2021-05-03 14:55:17,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:17,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:17,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:17,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:17,351 INFO L87 Difference]: Start difference. First operand 251 states and 756 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:17,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:17,444 INFO L93 Difference]: Finished difference Result 469 states and 1343 transitions. [2021-05-03 14:55:17,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:17,444 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:17,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:17,445 INFO L225 Difference]: With dead ends: 469 [2021-05-03 14:55:17,445 INFO L226 Difference]: Without dead ends: 461 [2021-05-03 14:55:17,445 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 54.9ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:55:17,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-05-03 14:55:17,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 271. [2021-05-03 14:55:17,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 3.0444444444444443) internal successors, (822), 270 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:17,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 822 transitions. [2021-05-03 14:55:17,448 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 822 transitions. Word has length 19 [2021-05-03 14:55:17,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:17,448 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 822 transitions. [2021-05-03 14:55:17,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:17,449 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 822 transitions. [2021-05-03 14:55:17,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:17,449 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:17,449 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:17,449 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable526 [2021-05-03 14:55:17,449 INFO L428 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:17,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:17,449 INFO L82 PathProgramCache]: Analyzing trace with hash -584232867, now seen corresponding path program 14 times [2021-05-03 14:55:17,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:17,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940284030] [2021-05-03 14:55:17,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:17,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:17,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:17,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940284030] [2021-05-03 14:55:17,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:17,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:17,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048333818] [2021-05-03 14:55:17,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:17,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:17,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:17,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:17,491 INFO L87 Difference]: Start difference. First operand 271 states and 822 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:17,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:17,590 INFO L93 Difference]: Finished difference Result 475 states and 1358 transitions. [2021-05-03 14:55:17,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:17,590 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:17,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:17,591 INFO L225 Difference]: With dead ends: 475 [2021-05-03 14:55:17,591 INFO L226 Difference]: Without dead ends: 467 [2021-05-03 14:55:17,591 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 58.3ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:55:17,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-05-03 14:55:17,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 275. [2021-05-03 14:55:17,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 3.0328467153284673) internal successors, (831), 274 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:17,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 831 transitions. [2021-05-03 14:55:17,595 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 831 transitions. Word has length 19 [2021-05-03 14:55:17,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:17,595 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 831 transitions. [2021-05-03 14:55:17,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:17,595 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 831 transitions. [2021-05-03 14:55:17,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:17,596 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:17,596 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:17,596 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable527 [2021-05-03 14:55:17,596 INFO L428 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:17,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:17,596 INFO L82 PathProgramCache]: Analyzing trace with hash 967392422, now seen corresponding path program 13 times [2021-05-03 14:55:17,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:17,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442208398] [2021-05-03 14:55:17,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:17,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:17,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:17,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442208398] [2021-05-03 14:55:17,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707699803] [2021-05-03 14:55:17,645 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:17,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:17,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:17,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:17,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:17,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:17,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:55:17,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876745611] [2021-05-03 14:55:17,749 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:55:17,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:17,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:55:17,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:17,750 INFO L87 Difference]: Start difference. First operand 275 states and 831 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:17,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:17,871 INFO L93 Difference]: Finished difference Result 493 states and 1439 transitions. [2021-05-03 14:55:17,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:17,871 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:17,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:17,872 INFO L225 Difference]: With dead ends: 493 [2021-05-03 14:55:17,872 INFO L226 Difference]: Without dead ends: 493 [2021-05-03 14:55:17,872 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 98.9ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:55:17,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-05-03 14:55:17,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 281. [2021-05-03 14:55:17,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 3.0642857142857145) internal successors, (858), 280 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:17,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 858 transitions. [2021-05-03 14:55:17,876 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 858 transitions. Word has length 19 [2021-05-03 14:55:17,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:17,876 INFO L480 AbstractCegarLoop]: Abstraction has 281 states and 858 transitions. [2021-05-03 14:55:17,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:17,876 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 858 transitions. [2021-05-03 14:55:17,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:17,877 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:17,877 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:18,077 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable528 [2021-05-03 14:55:18,077 INFO L428 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:18,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:18,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1897553598, now seen corresponding path program 14 times [2021-05-03 14:55:18,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:18,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132079851] [2021-05-03 14:55:18,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:18,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:18,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:18,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132079851] [2021-05-03 14:55:18,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563791106] [2021-05-03 14:55:18,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:18,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:55:18,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:18,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:18,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:18,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:18,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:18,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:55:18,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438131315] [2021-05-03 14:55:18,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:55:18,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:18,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:55:18,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:18,241 INFO L87 Difference]: Start difference. First operand 281 states and 858 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:18,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:18,350 INFO L93 Difference]: Finished difference Result 475 states and 1370 transitions. [2021-05-03 14:55:18,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:18,351 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:18,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:18,351 INFO L225 Difference]: With dead ends: 475 [2021-05-03 14:55:18,351 INFO L226 Difference]: Without dead ends: 469 [2021-05-03 14:55:18,352 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 118.9ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:55:18,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-05-03 14:55:18,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 281. [2021-05-03 14:55:18,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 3.0607142857142855) internal successors, (857), 280 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:18,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 857 transitions. [2021-05-03 14:55:18,355 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 857 transitions. Word has length 19 [2021-05-03 14:55:18,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:18,355 INFO L480 AbstractCegarLoop]: Abstraction has 281 states and 857 transitions. [2021-05-03 14:55:18,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:18,356 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 857 transitions. [2021-05-03 14:55:18,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:18,356 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:18,356 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:18,556 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable529,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:18,556 INFO L428 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:18,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:18,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1169104647, now seen corresponding path program 15 times [2021-05-03 14:55:18,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:18,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369088550] [2021-05-03 14:55:18,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:18,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:18,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:18,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369088550] [2021-05-03 14:55:18,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279127371] [2021-05-03 14:55:18,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:18,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 14:55:18,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:18,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:18,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:18,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:18,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:18,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 14:55:18,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008168603] [2021-05-03 14:55:18,696 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:55:18,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:18,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:55:18,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:55:18,696 INFO L87 Difference]: Start difference. First operand 281 states and 857 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:18,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:18,803 INFO L93 Difference]: Finished difference Result 494 states and 1409 transitions. [2021-05-03 14:55:18,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:18,804 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:18,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:18,804 INFO L225 Difference]: With dead ends: 494 [2021-05-03 14:55:18,804 INFO L226 Difference]: Without dead ends: 486 [2021-05-03 14:55:18,804 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 81.7ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:55:18,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-05-03 14:55:18,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 281. [2021-05-03 14:55:18,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 3.0714285714285716) internal successors, (860), 280 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:18,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 860 transitions. [2021-05-03 14:55:18,808 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 860 transitions. Word has length 19 [2021-05-03 14:55:18,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:18,808 INFO L480 AbstractCegarLoop]: Abstraction has 281 states and 860 transitions. [2021-05-03 14:55:18,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:18,808 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 860 transitions. [2021-05-03 14:55:18,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:18,809 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:18,809 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:19,009 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-05-03 14:55:19,009 INFO L428 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:19,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:19,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1167792078, now seen corresponding path program 15 times [2021-05-03 14:55:19,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:19,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376740948] [2021-05-03 14:55:19,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:19,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:19,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:19,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376740948] [2021-05-03 14:55:19,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845965164] [2021-05-03 14:55:19,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:19,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:55:19,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:19,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:19,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:19,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:19,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:19,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:55:19,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627112607] [2021-05-03 14:55:19,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:55:19,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:19,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:55:19,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:19,148 INFO L87 Difference]: Start difference. First operand 281 states and 860 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:19,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:19,275 INFO L93 Difference]: Finished difference Result 484 states and 1404 transitions. [2021-05-03 14:55:19,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:19,275 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:19,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:19,276 INFO L225 Difference]: With dead ends: 484 [2021-05-03 14:55:19,276 INFO L226 Difference]: Without dead ends: 484 [2021-05-03 14:55:19,276 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 92.7ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:55:19,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-05-03 14:55:19,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 272. [2021-05-03 14:55:19,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 3.062730627306273) internal successors, (830), 271 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:19,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 830 transitions. [2021-05-03 14:55:19,280 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 830 transitions. Word has length 19 [2021-05-03 14:55:19,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:19,280 INFO L480 AbstractCegarLoop]: Abstraction has 272 states and 830 transitions. [2021-05-03 14:55:19,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:19,280 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 830 transitions. [2021-05-03 14:55:19,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:19,280 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:19,280 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:19,481 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable535 [2021-05-03 14:55:19,481 INFO L428 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:19,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:19,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1086551406, now seen corresponding path program 16 times [2021-05-03 14:55:19,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:19,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910598036] [2021-05-03 14:55:19,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:19,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:19,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:19,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910598036] [2021-05-03 14:55:19,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051356693] [2021-05-03 14:55:19,518 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:19,542 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:55:19,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:19,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:19,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:19,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:19,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:19,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:55:19,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388579110] [2021-05-03 14:55:19,629 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:55:19,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:19,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:55:19,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:19,629 INFO L87 Difference]: Start difference. First operand 272 states and 830 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:19,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:19,722 INFO L93 Difference]: Finished difference Result 439 states and 1276 transitions. [2021-05-03 14:55:19,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:19,723 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:19,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:19,723 INFO L225 Difference]: With dead ends: 439 [2021-05-03 14:55:19,723 INFO L226 Difference]: Without dead ends: 430 [2021-05-03 14:55:19,724 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 95.2ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:55:19,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-05-03 14:55:19,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 272. [2021-05-03 14:55:19,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 3.047970479704797) internal successors, (826), 271 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:19,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 826 transitions. [2021-05-03 14:55:19,727 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 826 transitions. Word has length 19 [2021-05-03 14:55:19,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:19,727 INFO L480 AbstractCegarLoop]: Abstraction has 272 states and 826 transitions. [2021-05-03 14:55:19,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:19,727 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 826 transitions. [2021-05-03 14:55:19,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:19,727 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:19,727 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:19,928 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable536 [2021-05-03 14:55:19,928 INFO L428 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:19,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:19,928 INFO L82 PathProgramCache]: Analyzing trace with hash -889110087, now seen corresponding path program 16 times [2021-05-03 14:55:19,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:19,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710774212] [2021-05-03 14:55:19,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:19,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:19,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:19,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710774212] [2021-05-03 14:55:19,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145122293] [2021-05-03 14:55:19,966 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:19,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:55:19,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:19,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:19,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:20,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:20,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:20,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 14:55:20,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401331641] [2021-05-03 14:55:20,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:55:20,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:20,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:55:20,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:55:20,070 INFO L87 Difference]: Start difference. First operand 272 states and 826 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:20,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:20,203 INFO L93 Difference]: Finished difference Result 466 states and 1359 transitions. [2021-05-03 14:55:20,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:20,203 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:20,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:20,204 INFO L225 Difference]: With dead ends: 466 [2021-05-03 14:55:20,204 INFO L226 Difference]: Without dead ends: 466 [2021-05-03 14:55:20,204 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 83.2ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:55:20,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-05-03 14:55:20,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 268. [2021-05-03 14:55:20,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 3.048689138576779) internal successors, (814), 267 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:20,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 814 transitions. [2021-05-03 14:55:20,211 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 814 transitions. Word has length 19 [2021-05-03 14:55:20,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:20,211 INFO L480 AbstractCegarLoop]: Abstraction has 268 states and 814 transitions. [2021-05-03 14:55:20,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:20,211 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 814 transitions. [2021-05-03 14:55:20,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:20,212 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:20,212 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:20,412 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable539,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:20,412 INFO L428 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:20,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:20,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1710395246, now seen corresponding path program 17 times [2021-05-03 14:55:20,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:20,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711674049] [2021-05-03 14:55:20,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:20,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:20,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:20,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711674049] [2021-05-03 14:55:20,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:20,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:20,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865918331] [2021-05-03 14:55:20,453 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:20,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:20,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:20,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:20,453 INFO L87 Difference]: Start difference. First operand 268 states and 814 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:20,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:20,589 INFO L93 Difference]: Finished difference Result 410 states and 1187 transitions. [2021-05-03 14:55:20,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:20,589 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:20,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:20,590 INFO L225 Difference]: With dead ends: 410 [2021-05-03 14:55:20,590 INFO L226 Difference]: Without dead ends: 404 [2021-05-03 14:55:20,590 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 95.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:20,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-05-03 14:55:20,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 278. [2021-05-03 14:55:20,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 3.0288808664259927) internal successors, (839), 277 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:20,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 839 transitions. [2021-05-03 14:55:20,594 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 839 transitions. Word has length 19 [2021-05-03 14:55:20,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:20,594 INFO L480 AbstractCegarLoop]: Abstraction has 278 states and 839 transitions. [2021-05-03 14:55:20,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:20,594 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 839 transitions. [2021-05-03 14:55:20,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:20,594 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:20,594 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:20,594 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable540 [2021-05-03 14:55:20,594 INFO L428 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:20,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:20,595 INFO L82 PathProgramCache]: Analyzing trace with hash 608481094, now seen corresponding path program 18 times [2021-05-03 14:55:20,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:20,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704900158] [2021-05-03 14:55:20,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:20,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:20,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:20,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704900158] [2021-05-03 14:55:20,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:20,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:20,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729671214] [2021-05-03 14:55:20,634 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:20,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:20,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:20,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:20,634 INFO L87 Difference]: Start difference. First operand 278 states and 839 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:20,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:20,763 INFO L93 Difference]: Finished difference Result 374 states and 1104 transitions. [2021-05-03 14:55:20,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:20,764 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:20,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:20,765 INFO L225 Difference]: With dead ends: 374 [2021-05-03 14:55:20,765 INFO L226 Difference]: Without dead ends: 363 [2021-05-03 14:55:20,765 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 92.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:20,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-05-03 14:55:20,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 268. [2021-05-03 14:55:20,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 3.044943820224719) internal successors, (813), 267 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:20,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 813 transitions. [2021-05-03 14:55:20,768 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 813 transitions. Word has length 19 [2021-05-03 14:55:20,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:20,768 INFO L480 AbstractCegarLoop]: Abstraction has 268 states and 813 transitions. [2021-05-03 14:55:20,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:20,769 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 813 transitions. [2021-05-03 14:55:20,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:20,769 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:20,769 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:20,769 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable541 [2021-05-03 14:55:20,769 INFO L428 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:20,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:20,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1860559839, now seen corresponding path program 17 times [2021-05-03 14:55:20,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:20,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804004205] [2021-05-03 14:55:20,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:20,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:20,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:20,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804004205] [2021-05-03 14:55:20,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:20,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:20,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270651905] [2021-05-03 14:55:20,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:20,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:20,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:20,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:20,808 INFO L87 Difference]: Start difference. First operand 268 states and 813 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:20,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:20,908 INFO L93 Difference]: Finished difference Result 435 states and 1255 transitions. [2021-05-03 14:55:20,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:20,909 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:20,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:20,909 INFO L225 Difference]: With dead ends: 435 [2021-05-03 14:55:20,910 INFO L226 Difference]: Without dead ends: 429 [2021-05-03 14:55:20,910 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 59.7ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:55:20,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-05-03 14:55:20,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 274. [2021-05-03 14:55:20,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 3.029304029304029) internal successors, (827), 273 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:20,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 827 transitions. [2021-05-03 14:55:20,913 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 827 transitions. Word has length 19 [2021-05-03 14:55:20,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:20,913 INFO L480 AbstractCegarLoop]: Abstraction has 274 states and 827 transitions. [2021-05-03 14:55:20,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:20,913 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 827 transitions. [2021-05-03 14:55:20,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:20,914 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:20,914 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:20,914 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable542 [2021-05-03 14:55:20,914 INFO L428 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:20,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:20,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1590050147, now seen corresponding path program 18 times [2021-05-03 14:55:20,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:20,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145478206] [2021-05-03 14:55:20,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:20,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:20,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:20,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145478206] [2021-05-03 14:55:20,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:20,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:20,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338323108] [2021-05-03 14:55:20,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:20,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:20,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:20,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:20,954 INFO L87 Difference]: Start difference. First operand 274 states and 827 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:21,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:21,064 INFO L93 Difference]: Finished difference Result 413 states and 1218 transitions. [2021-05-03 14:55:21,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:21,064 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:21,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:21,065 INFO L225 Difference]: With dead ends: 413 [2021-05-03 14:55:21,065 INFO L226 Difference]: Without dead ends: 413 [2021-05-03 14:55:21,065 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 65.1ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:55:21,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-05-03 14:55:21,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 253. [2021-05-03 14:55:21,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 3.0277777777777777) internal successors, (763), 252 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:21,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 763 transitions. [2021-05-03 14:55:21,068 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 763 transitions. Word has length 19 [2021-05-03 14:55:21,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:21,068 INFO L480 AbstractCegarLoop]: Abstraction has 253 states and 763 transitions. [2021-05-03 14:55:21,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:21,068 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 763 transitions. [2021-05-03 14:55:21,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:21,069 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:21,069 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:21,069 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable543 [2021-05-03 14:55:21,069 INFO L428 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:21,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:21,069 INFO L82 PathProgramCache]: Analyzing trace with hash 53973003, now seen corresponding path program 19 times [2021-05-03 14:55:21,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:21,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282229725] [2021-05-03 14:55:21,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:21,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:21,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:21,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282229725] [2021-05-03 14:55:21,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:21,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:21,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177725461] [2021-05-03 14:55:21,112 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:21,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:21,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:21,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:21,112 INFO L87 Difference]: Start difference. First operand 253 states and 763 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:21,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:21,238 INFO L93 Difference]: Finished difference Result 398 states and 1147 transitions. [2021-05-03 14:55:21,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:21,239 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:21,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:21,240 INFO L225 Difference]: With dead ends: 398 [2021-05-03 14:55:21,240 INFO L226 Difference]: Without dead ends: 382 [2021-05-03 14:55:21,240 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 90.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:21,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-05-03 14:55:21,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 259. [2021-05-03 14:55:21,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 3.0232558139534884) internal successors, (780), 258 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:21,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 780 transitions. [2021-05-03 14:55:21,243 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 780 transitions. Word has length 19 [2021-05-03 14:55:21,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:21,243 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 780 transitions. [2021-05-03 14:55:21,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:21,243 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 780 transitions. [2021-05-03 14:55:21,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:21,243 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:21,243 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:21,243 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable544 [2021-05-03 14:55:21,244 INFO L428 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:21,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:21,244 INFO L82 PathProgramCache]: Analyzing trace with hash -481846493, now seen corresponding path program 20 times [2021-05-03 14:55:21,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:21,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454262105] [2021-05-03 14:55:21,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:21,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:21,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:21,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454262105] [2021-05-03 14:55:21,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:21,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:21,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192014] [2021-05-03 14:55:21,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:21,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:21,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:21,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:21,280 INFO L87 Difference]: Start difference. First operand 259 states and 780 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:21,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:21,414 INFO L93 Difference]: Finished difference Result 427 states and 1201 transitions. [2021-05-03 14:55:21,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:21,415 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:21,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:21,415 INFO L225 Difference]: With dead ends: 427 [2021-05-03 14:55:21,415 INFO L226 Difference]: Without dead ends: 419 [2021-05-03 14:55:21,415 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 100.8ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:21,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-05-03 14:55:21,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 275. [2021-05-03 14:55:21,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 3.0072992700729926) internal successors, (824), 274 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:21,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 824 transitions. [2021-05-03 14:55:21,419 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 824 transitions. Word has length 19 [2021-05-03 14:55:21,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:21,419 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 824 transitions. [2021-05-03 14:55:21,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:21,419 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 824 transitions. [2021-05-03 14:55:21,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:21,419 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:21,420 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:21,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable545 [2021-05-03 14:55:21,420 INFO L428 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:21,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:21,420 INFO L82 PathProgramCache]: Analyzing trace with hash -101108853, now seen corresponding path program 21 times [2021-05-03 14:55:21,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:21,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432786075] [2021-05-03 14:55:21,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:21,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:21,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:21,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432786075] [2021-05-03 14:55:21,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:21,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:21,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132004854] [2021-05-03 14:55:21,452 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:21,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:21,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:21,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:21,452 INFO L87 Difference]: Start difference. First operand 275 states and 824 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:21,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:21,570 INFO L93 Difference]: Finished difference Result 390 states and 1115 transitions. [2021-05-03 14:55:21,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:21,571 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:21,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:21,571 INFO L225 Difference]: With dead ends: 390 [2021-05-03 14:55:21,571 INFO L226 Difference]: Without dead ends: 380 [2021-05-03 14:55:21,572 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 90.6ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:21,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-05-03 14:55:21,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 265. [2021-05-03 14:55:21,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 3.015151515151515) internal successors, (796), 264 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:21,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 796 transitions. [2021-05-03 14:55:21,575 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 796 transitions. Word has length 19 [2021-05-03 14:55:21,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:21,575 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 796 transitions. [2021-05-03 14:55:21,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:21,575 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 796 transitions. [2021-05-03 14:55:21,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:21,575 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:21,575 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:21,575 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable546 [2021-05-03 14:55:21,575 INFO L428 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:21,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:21,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1901365676, now seen corresponding path program 19 times [2021-05-03 14:55:21,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:21,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048753226] [2021-05-03 14:55:21,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:21,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:21,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:21,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048753226] [2021-05-03 14:55:21,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058626491] [2021-05-03 14:55:21,609 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:21,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:21,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:21,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:21,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:21,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:21,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-03 14:55:21,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746547505] [2021-05-03 14:55:21,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:55:21,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:21,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:55:21,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:55:21,680 INFO L87 Difference]: Start difference. First operand 265 states and 796 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:21,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:21,784 INFO L93 Difference]: Finished difference Result 537 states and 1572 transitions. [2021-05-03 14:55:21,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:21,785 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:21,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:21,785 INFO L225 Difference]: With dead ends: 537 [2021-05-03 14:55:21,785 INFO L226 Difference]: Without dead ends: 537 [2021-05-03 14:55:21,786 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 66.4ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:21,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-05-03 14:55:21,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 271. [2021-05-03 14:55:21,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 3.025925925925926) internal successors, (817), 270 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:21,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 817 transitions. [2021-05-03 14:55:21,789 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 817 transitions. Word has length 19 [2021-05-03 14:55:21,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:21,789 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 817 transitions. [2021-05-03 14:55:21,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:21,789 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 817 transitions. [2021-05-03 14:55:21,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:21,790 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:21,790 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:21,990 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable547 [2021-05-03 14:55:21,990 INFO L428 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:21,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:21,991 INFO L82 PathProgramCache]: Analyzing trace with hash -2057197508, now seen corresponding path program 20 times [2021-05-03 14:55:21,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:21,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838308326] [2021-05-03 14:55:21,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:21,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:22,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:22,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838308326] [2021-05-03 14:55:22,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426473757] [2021-05-03 14:55:22,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:22,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:55:22,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:22,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:22,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:22,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:22,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:22,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 14:55:22,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380142894] [2021-05-03 14:55:22,104 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:55:22,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:22,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:55:22,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:55:22,104 INFO L87 Difference]: Start difference. First operand 271 states and 817 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:22,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:22,213 INFO L93 Difference]: Finished difference Result 552 states and 1596 transitions. [2021-05-03 14:55:22,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:22,214 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:22,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:22,215 INFO L225 Difference]: With dead ends: 552 [2021-05-03 14:55:22,215 INFO L226 Difference]: Without dead ends: 552 [2021-05-03 14:55:22,215 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 78.2ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:55:22,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-05-03 14:55:22,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 277. [2021-05-03 14:55:22,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 3.0579710144927534) internal successors, (844), 276 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:22,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 844 transitions. [2021-05-03 14:55:22,219 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 844 transitions. Word has length 19 [2021-05-03 14:55:22,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:22,219 INFO L480 AbstractCegarLoop]: Abstraction has 277 states and 844 transitions. [2021-05-03 14:55:22,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:22,219 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 844 transitions. [2021-05-03 14:55:22,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:22,219 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:22,219 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:22,434 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:22,434 INFO L428 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:22,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:22,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1127036332, now seen corresponding path program 21 times [2021-05-03 14:55:22,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:22,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324818252] [2021-05-03 14:55:22,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:22,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:22,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:22,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324818252] [2021-05-03 14:55:22,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947835086] [2021-05-03 14:55:22,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:22,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 14:55:22,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:22,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:22,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:22,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:22,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:22,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 14:55:22,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126841109] [2021-05-03 14:55:22,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:55:22,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:22,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:55:22,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:55:22,544 INFO L87 Difference]: Start difference. First operand 277 states and 844 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:22,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:22,643 INFO L93 Difference]: Finished difference Result 498 states and 1443 transitions. [2021-05-03 14:55:22,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:22,643 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:22,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:22,644 INFO L225 Difference]: With dead ends: 498 [2021-05-03 14:55:22,644 INFO L226 Difference]: Without dead ends: 492 [2021-05-03 14:55:22,644 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 71.3ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:55:22,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-05-03 14:55:22,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 274. [2021-05-03 14:55:22,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 3.0549450549450547) internal successors, (834), 273 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:22,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 834 transitions. [2021-05-03 14:55:22,648 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 834 transitions. Word has length 19 [2021-05-03 14:55:22,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:22,648 INFO L480 AbstractCegarLoop]: Abstraction has 274 states and 834 transitions. [2021-05-03 14:55:22,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:22,648 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 834 transitions. [2021-05-03 14:55:22,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:22,649 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:22,649 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:22,855 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable549,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:22,856 INFO L428 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:22,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:22,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1979218041, now seen corresponding path program 22 times [2021-05-03 14:55:22,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:22,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432069312] [2021-05-03 14:55:22,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:22,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:22,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:22,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432069312] [2021-05-03 14:55:22,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144072656] [2021-05-03 14:55:22,891 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:22,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:55:22,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:22,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:22,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:22,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:22,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:22,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 14:55:22,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616734599] [2021-05-03 14:55:22,997 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:55:22,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:22,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:55:22,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:55:22,997 INFO L87 Difference]: Start difference. First operand 274 states and 834 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:23,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:23,115 INFO L93 Difference]: Finished difference Result 476 states and 1382 transitions. [2021-05-03 14:55:23,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:23,117 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:23,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:23,118 INFO L225 Difference]: With dead ends: 476 [2021-05-03 14:55:23,118 INFO L226 Difference]: Without dead ends: 460 [2021-05-03 14:55:23,118 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 91.4ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:55:23,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-05-03 14:55:23,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 271. [2021-05-03 14:55:23,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 3.051851851851852) internal successors, (824), 270 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:23,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 824 transitions. [2021-05-03 14:55:23,122 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 824 transitions. Word has length 19 [2021-05-03 14:55:23,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:23,122 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 824 transitions. [2021-05-03 14:55:23,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:23,122 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 824 transitions. [2021-05-03 14:55:23,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:23,123 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:23,123 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:23,329 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable552,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:23,329 INFO L428 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:23,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:23,329 INFO L82 PathProgramCache]: Analyzing trace with hash 16056364, now seen corresponding path program 22 times [2021-05-03 14:55:23,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:23,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794420724] [2021-05-03 14:55:23,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:23,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:23,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:23,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794420724] [2021-05-03 14:55:23,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416242588] [2021-05-03 14:55:23,384 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:23,406 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:55:23,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:23,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:23,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:23,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:23,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:23,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-03 14:55:23,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197186071] [2021-05-03 14:55:23,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:55:23,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:23,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:55:23,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:55:23,466 INFO L87 Difference]: Start difference. First operand 271 states and 824 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:23,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:23,600 INFO L93 Difference]: Finished difference Result 539 states and 1596 transitions. [2021-05-03 14:55:23,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:23,602 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:23,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:23,603 INFO L225 Difference]: With dead ends: 539 [2021-05-03 14:55:23,603 INFO L226 Difference]: Without dead ends: 539 [2021-05-03 14:55:23,603 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 85.8ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:23,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-05-03 14:55:23,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 259. [2021-05-03 14:55:23,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 3.0310077519379846) internal successors, (782), 258 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:23,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 782 transitions. [2021-05-03 14:55:23,607 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 782 transitions. Word has length 19 [2021-05-03 14:55:23,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:23,607 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 782 transitions. [2021-05-03 14:55:23,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:23,607 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 782 transitions. [2021-05-03 14:55:23,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:23,607 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:23,607 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:23,809 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable555,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:23,810 INFO L428 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:23,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:23,810 INFO L82 PathProgramCache]: Analyzing trace with hash -366317049, now seen corresponding path program 23 times [2021-05-03 14:55:23,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:23,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311769412] [2021-05-03 14:55:23,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:23,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:23,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:23,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311769412] [2021-05-03 14:55:23,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786858337] [2021-05-03 14:55:23,848 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:23,869 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:55:23,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:23,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:23,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:23,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:23,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:23,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:55:23,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551840748] [2021-05-03 14:55:23,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:55:23,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:23,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:55:23,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:23,951 INFO L87 Difference]: Start difference. First operand 259 states and 782 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:24,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:24,050 INFO L93 Difference]: Finished difference Result 482 states and 1413 transitions. [2021-05-03 14:55:24,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:24,050 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:24,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:24,051 INFO L225 Difference]: With dead ends: 482 [2021-05-03 14:55:24,051 INFO L226 Difference]: Without dead ends: 474 [2021-05-03 14:55:24,051 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 99.8ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:55:24,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-05-03 14:55:24,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 275. [2021-05-03 14:55:24,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 3.0583941605839415) internal successors, (838), 274 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:24,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 838 transitions. [2021-05-03 14:55:24,055 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 838 transitions. Word has length 19 [2021-05-03 14:55:24,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:24,055 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 838 transitions. [2021-05-03 14:55:24,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:24,055 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 838 transitions. [2021-05-03 14:55:24,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:24,055 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:24,056 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:24,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable556 [2021-05-03 14:55:24,269 INFO L428 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:24,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:24,269 INFO L82 PathProgramCache]: Analyzing trace with hash -334370096, now seen corresponding path program 23 times [2021-05-03 14:55:24,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:24,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368428290] [2021-05-03 14:55:24,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:24,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:24,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:24,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368428290] [2021-05-03 14:55:24,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563415192] [2021-05-03 14:55:24,305 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:24,340 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:55:24,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:24,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:24,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:24,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:24,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:24,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 14:55:24,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084318434] [2021-05-03 14:55:24,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:55:24,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:24,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:55:24,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:55:24,389 INFO L87 Difference]: Start difference. First operand 275 states and 838 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:24,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:24,485 INFO L93 Difference]: Finished difference Result 532 states and 1566 transitions. [2021-05-03 14:55:24,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:24,485 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:24,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:24,486 INFO L225 Difference]: With dead ends: 532 [2021-05-03 14:55:24,486 INFO L226 Difference]: Without dead ends: 532 [2021-05-03 14:55:24,486 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 71.4ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:55:24,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-05-03 14:55:24,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 275. [2021-05-03 14:55:24,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 3.0583941605839415) internal successors, (838), 274 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:24,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 838 transitions. [2021-05-03 14:55:24,490 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 838 transitions. Word has length 19 [2021-05-03 14:55:24,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:24,490 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 838 transitions. [2021-05-03 14:55:24,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:24,490 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 838 transitions. [2021-05-03 14:55:24,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:24,490 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:24,490 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:24,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable559,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:24,705 INFO L428 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:24,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:24,705 INFO L82 PathProgramCache]: Analyzing trace with hash 2088629120, now seen corresponding path program 24 times [2021-05-03 14:55:24,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:24,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437147795] [2021-05-03 14:55:24,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:24,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:24,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:24,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437147795] [2021-05-03 14:55:24,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283179736] [2021-05-03 14:55:24,739 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:24,759 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 14:55:24,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:24,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:24,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:24,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:24,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:24,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 14:55:24,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371863219] [2021-05-03 14:55:24,822 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:55:24,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:24,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:55:24,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:55:24,822 INFO L87 Difference]: Start difference. First operand 275 states and 838 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:24,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:24,939 INFO L93 Difference]: Finished difference Result 478 states and 1416 transitions. [2021-05-03 14:55:24,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:24,939 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:24,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:24,940 INFO L225 Difference]: With dead ends: 478 [2021-05-03 14:55:24,940 INFO L226 Difference]: Without dead ends: 469 [2021-05-03 14:55:24,940 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 78.5ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:55:24,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-05-03 14:55:24,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 275. [2021-05-03 14:55:24,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 3.0437956204379564) internal successors, (834), 274 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:24,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 834 transitions. [2021-05-03 14:55:24,945 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 834 transitions. Word has length 19 [2021-05-03 14:55:24,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:24,945 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 834 transitions. [2021-05-03 14:55:24,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:24,945 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 834 transitions. [2021-05-03 14:55:24,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:24,945 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:24,945 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:25,160 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable560,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:25,161 INFO L428 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:25,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:25,161 INFO L82 PathProgramCache]: Analyzing trace with hash 112967627, now seen corresponding path program 24 times [2021-05-03 14:55:25,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:25,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025752846] [2021-05-03 14:55:25,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:25,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:25,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:25,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025752846] [2021-05-03 14:55:25,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7825956] [2021-05-03 14:55:25,206 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:25,234 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 14:55:25,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:25,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:25,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:25,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:25,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:25,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:55:25,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537547379] [2021-05-03 14:55:25,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:55:25,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:25,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:55:25,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:25,319 INFO L87 Difference]: Start difference. First operand 275 states and 834 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:25,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:25,449 INFO L93 Difference]: Finished difference Result 445 states and 1322 transitions. [2021-05-03 14:55:25,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:25,450 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:25,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:25,451 INFO L225 Difference]: With dead ends: 445 [2021-05-03 14:55:25,451 INFO L226 Difference]: Without dead ends: 445 [2021-05-03 14:55:25,451 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 117.3ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:55:25,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-05-03 14:55:25,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 255. [2021-05-03 14:55:25,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 3.031496062992126) internal successors, (770), 254 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:25,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 770 transitions. [2021-05-03 14:55:25,455 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 770 transitions. Word has length 19 [2021-05-03 14:55:25,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:25,455 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 770 transitions. [2021-05-03 14:55:25,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:25,455 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 770 transitions. [2021-05-03 14:55:25,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:25,455 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:25,455 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:25,664 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable563 [2021-05-03 14:55:25,665 INFO L428 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:25,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:25,665 INFO L82 PathProgramCache]: Analyzing trace with hash 510647071, now seen corresponding path program 25 times [2021-05-03 14:55:25,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:25,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402747115] [2021-05-03 14:55:25,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:25,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:25,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:25,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402747115] [2021-05-03 14:55:25,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:25,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:25,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162607341] [2021-05-03 14:55:25,704 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:25,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:25,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:25,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:25,704 INFO L87 Difference]: Start difference. First operand 255 states and 770 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:25,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:25,835 INFO L93 Difference]: Finished difference Result 454 states and 1310 transitions. [2021-05-03 14:55:25,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:25,835 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:25,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:25,836 INFO L225 Difference]: With dead ends: 454 [2021-05-03 14:55:25,836 INFO L226 Difference]: Without dead ends: 446 [2021-05-03 14:55:25,836 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 90.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:25,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-05-03 14:55:25,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 275. [2021-05-03 14:55:25,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 3.051094890510949) internal successors, (836), 274 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:25,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 836 transitions. [2021-05-03 14:55:25,840 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 836 transitions. Word has length 19 [2021-05-03 14:55:25,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:25,840 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 836 transitions. [2021-05-03 14:55:25,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:25,840 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 836 transitions. [2021-05-03 14:55:25,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:25,841 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:25,841 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:25,841 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable564 [2021-05-03 14:55:25,841 INFO L428 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:25,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:25,841 INFO L82 PathProgramCache]: Analyzing trace with hash 891384711, now seen corresponding path program 26 times [2021-05-03 14:55:25,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:25,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081175857] [2021-05-03 14:55:25,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:25,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:25,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:25,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081175857] [2021-05-03 14:55:25,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:25,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:25,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376116725] [2021-05-03 14:55:25,876 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:25,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:25,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:25,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:25,876 INFO L87 Difference]: Start difference. First operand 275 states and 836 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:26,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:26,011 INFO L93 Difference]: Finished difference Result 460 states and 1325 transitions. [2021-05-03 14:55:26,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:26,012 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:26,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:26,013 INFO L225 Difference]: With dead ends: 460 [2021-05-03 14:55:26,013 INFO L226 Difference]: Without dead ends: 452 [2021-05-03 14:55:26,013 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 93.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:26,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-05-03 14:55:26,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 279. [2021-05-03 14:55:26,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 3.039568345323741) internal successors, (845), 278 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:26,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 845 transitions. [2021-05-03 14:55:26,017 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 845 transitions. Word has length 19 [2021-05-03 14:55:26,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:26,017 INFO L480 AbstractCegarLoop]: Abstraction has 279 states and 845 transitions. [2021-05-03 14:55:26,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:26,017 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 845 transitions. [2021-05-03 14:55:26,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:26,017 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:26,017 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:26,017 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable565 [2021-05-03 14:55:26,017 INFO L428 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:26,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:26,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1851957296, now seen corresponding path program 25 times [2021-05-03 14:55:26,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:26,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130681138] [2021-05-03 14:55:26,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:26,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:26,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:26,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130681138] [2021-05-03 14:55:26,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361565219] [2021-05-03 14:55:26,061 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:26,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:26,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:26,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:26,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:26,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:26,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 14:55:26,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633407167] [2021-05-03 14:55:26,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:55:26,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:26,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:55:26,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:55:26,155 INFO L87 Difference]: Start difference. First operand 279 states and 845 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:26,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:26,281 INFO L93 Difference]: Finished difference Result 519 states and 1519 transitions. [2021-05-03 14:55:26,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:26,282 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:26,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:26,283 INFO L225 Difference]: With dead ends: 519 [2021-05-03 14:55:26,283 INFO L226 Difference]: Without dead ends: 519 [2021-05-03 14:55:26,283 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 91.6ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:55:26,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-05-03 14:55:26,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 285. [2021-05-03 14:55:26,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 3.0704225352112675) internal successors, (872), 284 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:26,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 872 transitions. [2021-05-03 14:55:26,287 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 872 transitions. Word has length 19 [2021-05-03 14:55:26,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:26,287 INFO L480 AbstractCegarLoop]: Abstraction has 285 states and 872 transitions. [2021-05-03 14:55:26,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:26,287 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 872 transitions. [2021-05-03 14:55:26,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:26,288 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:26,288 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:26,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable566,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:26,488 INFO L428 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:26,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:26,488 INFO L82 PathProgramCache]: Analyzing trace with hash -921796120, now seen corresponding path program 26 times [2021-05-03 14:55:26,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:26,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340055612] [2021-05-03 14:55:26,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:26,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:26,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:26,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340055612] [2021-05-03 14:55:26,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436157673] [2021-05-03 14:55:26,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:26,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:55:26,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:26,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:26,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:26,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:26,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:26,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 14:55:26,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398465871] [2021-05-03 14:55:26,638 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:55:26,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:26,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:55:26,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:55:26,638 INFO L87 Difference]: Start difference. First operand 285 states and 872 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:26,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:26,754 INFO L93 Difference]: Finished difference Result 501 states and 1450 transitions. [2021-05-03 14:55:26,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:26,754 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:26,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:26,755 INFO L225 Difference]: With dead ends: 501 [2021-05-03 14:55:26,755 INFO L226 Difference]: Without dead ends: 495 [2021-05-03 14:55:26,755 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 98.1ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:55:26,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-05-03 14:55:26,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 284. [2021-05-03 14:55:26,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 3.0636042402826855) internal successors, (867), 283 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:26,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 867 transitions. [2021-05-03 14:55:26,759 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 867 transitions. Word has length 19 [2021-05-03 14:55:26,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:26,759 INFO L480 AbstractCegarLoop]: Abstraction has 284 states and 867 transitions. [2021-05-03 14:55:26,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:26,759 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 867 transitions. [2021-05-03 14:55:26,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:26,760 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:26,760 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:26,960 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable567 [2021-05-03 14:55:26,960 INFO L428 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:26,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:26,961 INFO L82 PathProgramCache]: Analyzing trace with hash 306512931, now seen corresponding path program 27 times [2021-05-03 14:55:26,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:26,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315726539] [2021-05-03 14:55:26,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:26,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:26,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:26,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315726539] [2021-05-03 14:55:26,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539526581] [2021-05-03 14:55:26,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:27,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 14:55:27,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:27,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:27,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:27,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:27,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:27,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:55:27,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233750044] [2021-05-03 14:55:27,121 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:55:27,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:27,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:55:27,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:27,121 INFO L87 Difference]: Start difference. First operand 284 states and 867 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:27,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:27,233 INFO L93 Difference]: Finished difference Result 478 states and 1372 transitions. [2021-05-03 14:55:27,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:27,234 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:27,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:27,234 INFO L225 Difference]: With dead ends: 478 [2021-05-03 14:55:27,235 INFO L226 Difference]: Without dead ends: 470 [2021-05-03 14:55:27,235 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 93.0ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:55:27,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-05-03 14:55:27,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 284. [2021-05-03 14:55:27,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 3.0742049469964665) internal successors, (870), 283 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:27,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 870 transitions. [2021-05-03 14:55:27,238 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 870 transitions. Word has length 19 [2021-05-03 14:55:27,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:27,239 INFO L480 AbstractCegarLoop]: Abstraction has 284 states and 870 transitions. [2021-05-03 14:55:27,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:27,239 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 870 transitions. [2021-05-03 14:55:27,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:27,239 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:27,239 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:27,439 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable570,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:27,440 INFO L428 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:27,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:27,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1651557640, now seen corresponding path program 27 times [2021-05-03 14:55:27,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:27,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113762495] [2021-05-03 14:55:27,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:27,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:27,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:27,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113762495] [2021-05-03 14:55:27,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010435443] [2021-05-03 14:55:27,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:27,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:55:27,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:27,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:27,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:27,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:27,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:27,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 14:55:27,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275277129] [2021-05-03 14:55:27,573 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:55:27,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:27,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:55:27,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:55:27,574 INFO L87 Difference]: Start difference. First operand 284 states and 870 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:27,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:27,677 INFO L93 Difference]: Finished difference Result 498 states and 1443 transitions. [2021-05-03 14:55:27,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:27,678 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:27,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:27,679 INFO L225 Difference]: With dead ends: 498 [2021-05-03 14:55:27,679 INFO L226 Difference]: Without dead ends: 498 [2021-05-03 14:55:27,679 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 89.2ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:55:27,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-05-03 14:55:27,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 275. [2021-05-03 14:55:27,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 3.065693430656934) internal successors, (840), 274 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:27,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 840 transitions. [2021-05-03 14:55:27,683 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 840 transitions. Word has length 19 [2021-05-03 14:55:27,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:27,683 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 840 transitions. [2021-05-03 14:55:27,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:27,683 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 840 transitions. [2021-05-03 14:55:27,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:27,684 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:27,684 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:27,889 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable573 [2021-05-03 14:55:27,889 INFO L428 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:27,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:27,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1732798312, now seen corresponding path program 28 times [2021-05-03 14:55:27,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:27,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733112508] [2021-05-03 14:55:27,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:27,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:27,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:27,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733112508] [2021-05-03 14:55:27,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682196199] [2021-05-03 14:55:27,924 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:27,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:55:27,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:27,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:27,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:28,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:28,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:28,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 14:55:28,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471399232] [2021-05-03 14:55:28,021 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:55:28,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:28,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:55:28,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:55:28,022 INFO L87 Difference]: Start difference. First operand 275 states and 840 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:28,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:28,150 INFO L93 Difference]: Finished difference Result 453 states and 1315 transitions. [2021-05-03 14:55:28,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:28,151 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:28,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:28,151 INFO L225 Difference]: With dead ends: 453 [2021-05-03 14:55:28,151 INFO L226 Difference]: Without dead ends: 444 [2021-05-03 14:55:28,151 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 75.5ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:55:28,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-05-03 14:55:28,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 275. [2021-05-03 14:55:28,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 3.051094890510949) internal successors, (836), 274 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:28,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 836 transitions. [2021-05-03 14:55:28,155 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 836 transitions. Word has length 19 [2021-05-03 14:55:28,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:28,155 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 836 transitions. [2021-05-03 14:55:28,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:28,155 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 836 transitions. [2021-05-03 14:55:28,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:28,155 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:28,155 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:28,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable574,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:28,356 INFO L428 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:28,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:28,356 INFO L82 PathProgramCache]: Analyzing trace with hash 586507491, now seen corresponding path program 28 times [2021-05-03 14:55:28,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:28,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241693643] [2021-05-03 14:55:28,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:28,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:28,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:28,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241693643] [2021-05-03 14:55:28,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958962596] [2021-05-03 14:55:28,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:28,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:55:28,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:28,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:28,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:28,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:28,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:28,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:55:28,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991907466] [2021-05-03 14:55:28,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:55:28,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:28,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:55:28,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:28,503 INFO L87 Difference]: Start difference. First operand 275 states and 836 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:28,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:28,655 INFO L93 Difference]: Finished difference Result 450 states and 1322 transitions. [2021-05-03 14:55:28,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:28,656 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:28,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:28,656 INFO L225 Difference]: With dead ends: 450 [2021-05-03 14:55:28,657 INFO L226 Difference]: Without dead ends: 450 [2021-05-03 14:55:28,657 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 99.2ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:55:28,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-05-03 14:55:28,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 271. [2021-05-03 14:55:28,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 3.051851851851852) internal successors, (824), 270 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:28,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 824 transitions. [2021-05-03 14:55:28,660 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 824 transitions. Word has length 19 [2021-05-03 14:55:28,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:28,660 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 824 transitions. [2021-05-03 14:55:28,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:28,660 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 824 transitions. [2021-05-03 14:55:28,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:28,661 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:28,661 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:28,861 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable577 [2021-05-03 14:55:28,861 INFO L428 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:28,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:28,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1108954472, now seen corresponding path program 29 times [2021-05-03 14:55:28,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:28,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414946988] [2021-05-03 14:55:28,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:28,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:28,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:28,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414946988] [2021-05-03 14:55:28,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:28,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:28,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142000973] [2021-05-03 14:55:28,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:28,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:28,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:28,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:28,892 INFO L87 Difference]: Start difference. First operand 271 states and 824 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:28,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:28,974 INFO L93 Difference]: Finished difference Result 424 states and 1226 transitions. [2021-05-03 14:55:28,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:28,975 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:28,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:28,975 INFO L225 Difference]: With dead ends: 424 [2021-05-03 14:55:28,975 INFO L226 Difference]: Without dead ends: 418 [2021-05-03 14:55:28,976 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 48.5ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:55:28,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-05-03 14:55:28,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 281. [2021-05-03 14:55:28,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 3.032142857142857) internal successors, (849), 280 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:28,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 849 transitions. [2021-05-03 14:55:28,979 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 849 transitions. Word has length 19 [2021-05-03 14:55:28,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:28,979 INFO L480 AbstractCegarLoop]: Abstraction has 281 states and 849 transitions. [2021-05-03 14:55:28,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:28,979 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 849 transitions. [2021-05-03 14:55:28,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:28,979 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:28,979 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:28,979 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable578 [2021-05-03 14:55:28,979 INFO L428 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:28,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:28,980 INFO L82 PathProgramCache]: Analyzing trace with hash 2084098672, now seen corresponding path program 30 times [2021-05-03 14:55:28,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:28,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679256045] [2021-05-03 14:55:28,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:28,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:29,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:29,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679256045] [2021-05-03 14:55:29,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:29,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:29,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342094159] [2021-05-03 14:55:29,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:29,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:29,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:29,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:29,007 INFO L87 Difference]: Start difference. First operand 281 states and 849 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:29,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:29,089 INFO L93 Difference]: Finished difference Result 388 states and 1143 transitions. [2021-05-03 14:55:29,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:29,089 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:29,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:29,090 INFO L225 Difference]: With dead ends: 388 [2021-05-03 14:55:29,090 INFO L226 Difference]: Without dead ends: 377 [2021-05-03 14:55:29,090 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 49.1ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:55:29,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-05-03 14:55:29,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 271. [2021-05-03 14:55:29,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 3.0481481481481483) internal successors, (823), 270 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:29,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 823 transitions. [2021-05-03 14:55:29,093 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 823 transitions. Word has length 19 [2021-05-03 14:55:29,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:29,093 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 823 transitions. [2021-05-03 14:55:29,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:29,094 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 823 transitions. [2021-05-03 14:55:29,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:29,094 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:29,094 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:29,094 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable579 [2021-05-03 14:55:29,094 INFO L428 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:29,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:29,094 INFO L82 PathProgramCache]: Analyzing trace with hash -384942261, now seen corresponding path program 29 times [2021-05-03 14:55:29,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:29,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22730372] [2021-05-03 14:55:29,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:29,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:29,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:29,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22730372] [2021-05-03 14:55:29,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:29,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:29,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288411742] [2021-05-03 14:55:29,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:29,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:29,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:29,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:29,137 INFO L87 Difference]: Start difference. First operand 271 states and 823 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:29,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:29,271 INFO L93 Difference]: Finished difference Result 401 states and 1166 transitions. [2021-05-03 14:55:29,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:29,271 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:29,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:29,272 INFO L225 Difference]: With dead ends: 401 [2021-05-03 14:55:29,272 INFO L226 Difference]: Without dead ends: 395 [2021-05-03 14:55:29,272 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 89.5ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:29,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-05-03 14:55:29,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 277. [2021-05-03 14:55:29,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 3.032608695652174) internal successors, (837), 276 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:29,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 837 transitions. [2021-05-03 14:55:29,275 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 837 transitions. Word has length 19 [2021-05-03 14:55:29,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:29,275 INFO L480 AbstractCegarLoop]: Abstraction has 277 states and 837 transitions. [2021-05-03 14:55:29,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:29,275 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 837 transitions. [2021-05-03 14:55:29,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:29,275 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:29,275 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:29,276 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580 [2021-05-03 14:55:29,276 INFO L428 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:29,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:29,276 INFO L82 PathProgramCache]: Analyzing trace with hash -114432569, now seen corresponding path program 30 times [2021-05-03 14:55:29,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:29,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034484047] [2021-05-03 14:55:29,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:29,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:29,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:29,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034484047] [2021-05-03 14:55:29,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:29,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:29,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918667654] [2021-05-03 14:55:29,310 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:29,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:29,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:29,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:29,311 INFO L87 Difference]: Start difference. First operand 277 states and 837 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:29,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:29,440 INFO L93 Difference]: Finished difference Result 379 states and 1129 transitions. [2021-05-03 14:55:29,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:29,440 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:29,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:29,441 INFO L225 Difference]: With dead ends: 379 [2021-05-03 14:55:29,441 INFO L226 Difference]: Without dead ends: 379 [2021-05-03 14:55:29,441 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 86.0ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:29,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-05-03 14:55:29,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 255. [2021-05-03 14:55:29,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 3.031496062992126) internal successors, (770), 254 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:29,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 770 transitions. [2021-05-03 14:55:29,444 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 770 transitions. Word has length 19 [2021-05-03 14:55:29,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:29,444 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 770 transitions. [2021-05-03 14:55:29,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:29,444 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 770 transitions. [2021-05-03 14:55:29,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:29,445 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:29,445 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:29,445 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581 [2021-05-03 14:55:29,445 INFO L428 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:29,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:29,445 INFO L82 PathProgramCache]: Analyzing trace with hash 401252280, now seen corresponding path program 31 times [2021-05-03 14:55:29,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:29,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847640145] [2021-05-03 14:55:29,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:29,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:29,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:29,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847640145] [2021-05-03 14:55:29,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704299295] [2021-05-03 14:55:29,477 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:29,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:29,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:29,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:29,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:29,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:29,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 14:55:29,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659899946] [2021-05-03 14:55:29,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:55:29,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:29,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:55:29,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:55:29,563 INFO L87 Difference]: Start difference. First operand 255 states and 770 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:29,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:29,667 INFO L93 Difference]: Finished difference Result 485 states and 1377 transitions. [2021-05-03 14:55:29,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:29,668 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:29,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:29,668 INFO L225 Difference]: With dead ends: 485 [2021-05-03 14:55:29,668 INFO L226 Difference]: Without dead ends: 461 [2021-05-03 14:55:29,668 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 78.8ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:55:29,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-05-03 14:55:29,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 255. [2021-05-03 14:55:29,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 3.0039370078740157) internal successors, (763), 254 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:29,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 763 transitions. [2021-05-03 14:55:29,672 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 763 transitions. Word has length 19 [2021-05-03 14:55:29,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:29,672 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 763 transitions. [2021-05-03 14:55:29,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:29,672 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 763 transitions. [2021-05-03 14:55:29,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:29,672 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:29,672 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:29,873 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable582,143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:29,873 INFO L428 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:29,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:29,873 INFO L82 PathProgramCache]: Analyzing trace with hash 317204657, now seen corresponding path program 31 times [2021-05-03 14:55:29,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:29,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524269202] [2021-05-03 14:55:29,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:29,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:29,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:29,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524269202] [2021-05-03 14:55:29,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506088603] [2021-05-03 14:55:29,912 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:29,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:29,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:29,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:29,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:29,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:29,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-03 14:55:29,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089855068] [2021-05-03 14:55:29,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:55:29,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:29,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:55:29,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:55:29,986 INFO L87 Difference]: Start difference. First operand 255 states and 763 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:30,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:30,099 INFO L93 Difference]: Finished difference Result 428 states and 1251 transitions. [2021-05-03 14:55:30,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:30,100 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:30,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:30,101 INFO L225 Difference]: With dead ends: 428 [2021-05-03 14:55:30,101 INFO L226 Difference]: Without dead ends: 428 [2021-05-03 14:55:30,101 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 73.3ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:30,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-05-03 14:55:30,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 255. [2021-05-03 14:55:30,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 3.0039370078740157) internal successors, (763), 254 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:30,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 763 transitions. [2021-05-03 14:55:30,104 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 763 transitions. Word has length 19 [2021-05-03 14:55:30,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:30,104 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 763 transitions. [2021-05-03 14:55:30,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:30,104 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 763 transitions. [2021-05-03 14:55:30,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:30,104 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:30,104 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:30,305 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable585 [2021-05-03 14:55:30,305 INFO L428 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:30,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:30,305 INFO L82 PathProgramCache]: Analyzing trace with hash -27612327, now seen corresponding path program 32 times [2021-05-03 14:55:30,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:30,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84358247] [2021-05-03 14:55:30,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:30,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:30,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:30,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84358247] [2021-05-03 14:55:30,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501230934] [2021-05-03 14:55:30,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:30,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:55:30,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:30,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:30,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:30,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:30,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:30,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 14:55:30,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370530071] [2021-05-03 14:55:30,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:55:30,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:30,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:55:30,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:55:30,415 INFO L87 Difference]: Start difference. First operand 255 states and 763 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:30,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:30,517 INFO L93 Difference]: Finished difference Result 425 states and 1238 transitions. [2021-05-03 14:55:30,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:30,518 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:30,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:30,518 INFO L225 Difference]: With dead ends: 425 [2021-05-03 14:55:30,518 INFO L226 Difference]: Without dead ends: 417 [2021-05-03 14:55:30,518 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 78.0ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:55:30,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-05-03 14:55:30,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 271. [2021-05-03 14:55:30,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 3.033333333333333) internal successors, (819), 270 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:30,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 819 transitions. [2021-05-03 14:55:30,522 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 819 transitions. Word has length 19 [2021-05-03 14:55:30,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:30,522 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 819 transitions. [2021-05-03 14:55:30,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:30,522 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 819 transitions. [2021-05-03 14:55:30,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:30,522 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:30,522 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:30,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable586 [2021-05-03 14:55:30,728 INFO L428 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:30,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:30,729 INFO L82 PathProgramCache]: Analyzing trace with hash 4334626, now seen corresponding path program 32 times [2021-05-03 14:55:30,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:30,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712078173] [2021-05-03 14:55:30,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:30,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:30,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:30,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712078173] [2021-05-03 14:55:30,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948359415] [2021-05-03 14:55:30,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:30,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:55:30,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:30,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:30,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:30,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:30,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:30,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:55:30,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630184571] [2021-05-03 14:55:30,865 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:55:30,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:30,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:55:30,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:30,865 INFO L87 Difference]: Start difference. First operand 271 states and 819 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:30,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:30,995 INFO L93 Difference]: Finished difference Result 489 states and 1412 transitions. [2021-05-03 14:55:30,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:30,996 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:30,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:30,997 INFO L225 Difference]: With dead ends: 489 [2021-05-03 14:55:30,997 INFO L226 Difference]: Without dead ends: 489 [2021-05-03 14:55:30,997 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 109.7ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:55:30,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-05-03 14:55:31,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 271. [2021-05-03 14:55:31,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 3.033333333333333) internal successors, (819), 270 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:31,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 819 transitions. [2021-05-03 14:55:31,001 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 819 transitions. Word has length 19 [2021-05-03 14:55:31,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:31,001 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 819 transitions. [2021-05-03 14:55:31,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:31,001 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 819 transitions. [2021-05-03 14:55:31,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:31,001 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:31,001 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:31,202 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable589,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:31,202 INFO L428 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:31,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:31,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1867633454, now seen corresponding path program 33 times [2021-05-03 14:55:31,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:31,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649616] [2021-05-03 14:55:31,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:31,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:31,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:31,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649616] [2021-05-03 14:55:31,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398184870] [2021-05-03 14:55:31,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:31,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 14:55:31,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:31,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:31,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:31,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:31,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:31,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:55:31,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492676598] [2021-05-03 14:55:31,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:55:31,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:31,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:55:31,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:31,326 INFO L87 Difference]: Start difference. First operand 271 states and 819 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:31,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:31,434 INFO L93 Difference]: Finished difference Result 498 states and 1425 transitions. [2021-05-03 14:55:31,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:31,434 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:31,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:31,435 INFO L225 Difference]: With dead ends: 498 [2021-05-03 14:55:31,435 INFO L226 Difference]: Without dead ends: 489 [2021-05-03 14:55:31,435 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 90.2ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:55:31,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-05-03 14:55:31,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 271. [2021-05-03 14:55:31,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 3.0185185185185186) internal successors, (815), 270 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:31,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 815 transitions. [2021-05-03 14:55:31,438 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 815 transitions. Word has length 19 [2021-05-03 14:55:31,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:31,438 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 815 transitions. [2021-05-03 14:55:31,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:31,438 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 815 transitions. [2021-05-03 14:55:31,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:31,439 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:31,439 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:31,639 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable590 [2021-05-03 14:55:31,639 INFO L428 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:31,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:31,640 INFO L82 PathProgramCache]: Analyzing trace with hash 451672349, now seen corresponding path program 33 times [2021-05-03 14:55:31,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:31,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355960299] [2021-05-03 14:55:31,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:31,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:31,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:31,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355960299] [2021-05-03 14:55:31,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269271183] [2021-05-03 14:55:31,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:31,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 14:55:31,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:31,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:31,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:31,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:31,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:31,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 14:55:31,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205576088] [2021-05-03 14:55:31,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:55:31,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:31,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:55:31,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:55:31,757 INFO L87 Difference]: Start difference. First operand 271 states and 815 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:31,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:31,868 INFO L93 Difference]: Finished difference Result 447 states and 1310 transitions. [2021-05-03 14:55:31,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:31,868 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:31,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:31,869 INFO L225 Difference]: With dead ends: 447 [2021-05-03 14:55:31,869 INFO L226 Difference]: Without dead ends: 447 [2021-05-03 14:55:31,869 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 78.1ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:55:31,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-05-03 14:55:31,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 260. [2021-05-03 14:55:31,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 3.0193050193050195) internal successors, (782), 259 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:31,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 782 transitions. [2021-05-03 14:55:31,873 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 782 transitions. Word has length 19 [2021-05-03 14:55:31,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:31,873 INFO L480 AbstractCegarLoop]: Abstraction has 260 states and 782 transitions. [2021-05-03 14:55:31,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:31,873 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 782 transitions. [2021-05-03 14:55:31,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:31,873 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:31,873 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:32,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable593,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:32,074 INFO L428 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:32,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:32,074 INFO L82 PathProgramCache]: Analyzing trace with hash 256701904, now seen corresponding path program 34 times [2021-05-03 14:55:32,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:32,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097121926] [2021-05-03 14:55:32,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:32,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:32,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:32,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097121926] [2021-05-03 14:55:32,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:32,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:32,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020545652] [2021-05-03 14:55:32,111 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:32,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:32,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:32,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:32,111 INFO L87 Difference]: Start difference. First operand 260 states and 782 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:32,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:32,201 INFO L93 Difference]: Finished difference Result 556 states and 1559 transitions. [2021-05-03 14:55:32,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:32,202 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:32,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:32,202 INFO L225 Difference]: With dead ends: 556 [2021-05-03 14:55:32,202 INFO L226 Difference]: Without dead ends: 532 [2021-05-03 14:55:32,202 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 54.1ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:55:32,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-05-03 14:55:32,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 264. [2021-05-03 14:55:32,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.9961977186311786) internal successors, (788), 263 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:32,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 788 transitions. [2021-05-03 14:55:32,206 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 788 transitions. Word has length 19 [2021-05-03 14:55:32,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:32,206 INFO L480 AbstractCegarLoop]: Abstraction has 264 states and 788 transitions. [2021-05-03 14:55:32,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:32,206 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 788 transitions. [2021-05-03 14:55:32,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:32,207 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:32,207 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:32,207 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable594 [2021-05-03 14:55:32,207 INFO L428 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:32,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:32,207 INFO L82 PathProgramCache]: Analyzing trace with hash -2084615198, now seen corresponding path program 35 times [2021-05-03 14:55:32,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:32,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231343378] [2021-05-03 14:55:32,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:32,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:32,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:32,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231343378] [2021-05-03 14:55:32,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:32,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:32,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597815029] [2021-05-03 14:55:32,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:32,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:32,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:32,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:32,244 INFO L87 Difference]: Start difference. First operand 264 states and 788 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:32,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:32,346 INFO L93 Difference]: Finished difference Result 540 states and 1513 transitions. [2021-05-03 14:55:32,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:32,347 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:32,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:32,348 INFO L225 Difference]: With dead ends: 540 [2021-05-03 14:55:32,348 INFO L226 Difference]: Without dead ends: 534 [2021-05-03 14:55:32,348 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 63.4ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:55:32,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-05-03 14:55:32,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 274. [2021-05-03 14:55:32,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.978021978021978) internal successors, (813), 273 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:32,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 813 transitions. [2021-05-03 14:55:32,352 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 813 transitions. Word has length 19 [2021-05-03 14:55:32,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:32,352 INFO L480 AbstractCegarLoop]: Abstraction has 274 states and 813 transitions. [2021-05-03 14:55:32,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:32,352 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 813 transitions. [2021-05-03 14:55:32,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:32,352 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:32,352 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:32,352 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable595 [2021-05-03 14:55:32,352 INFO L428 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:32,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:32,353 INFO L82 PathProgramCache]: Analyzing trace with hash -180498166, now seen corresponding path program 36 times [2021-05-03 14:55:32,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:32,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044877842] [2021-05-03 14:55:32,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:32,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:32,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:32,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044877842] [2021-05-03 14:55:32,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:32,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:32,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061744481] [2021-05-03 14:55:32,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:32,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:32,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:32,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:32,395 INFO L87 Difference]: Start difference. First operand 274 states and 813 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:32,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:32,491 INFO L93 Difference]: Finished difference Result 504 states and 1430 transitions. [2021-05-03 14:55:32,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:32,491 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:32,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:32,492 INFO L225 Difference]: With dead ends: 504 [2021-05-03 14:55:32,492 INFO L226 Difference]: Without dead ends: 489 [2021-05-03 14:55:32,492 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 66.7ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:55:32,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-05-03 14:55:32,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 260. [2021-05-03 14:55:32,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 3.011583011583012) internal successors, (780), 259 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:32,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 780 transitions. [2021-05-03 14:55:32,499 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 780 transitions. Word has length 19 [2021-05-03 14:55:32,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:32,499 INFO L480 AbstractCegarLoop]: Abstraction has 260 states and 780 transitions. [2021-05-03 14:55:32,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:32,499 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 780 transitions. [2021-05-03 14:55:32,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:32,500 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:32,500 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:32,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable596 [2021-05-03 14:55:32,500 INFO L428 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:32,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:32,500 INFO L82 PathProgramCache]: Analyzing trace with hash -136390839, now seen corresponding path program 34 times [2021-05-03 14:55:32,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:32,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884288478] [2021-05-03 14:55:32,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:32,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:32,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:32,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884288478] [2021-05-03 14:55:32,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614462355] [2021-05-03 14:55:32,547 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:32,568 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:55:32,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:32,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:32,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:32,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:32,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:32,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-03 14:55:32,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003166086] [2021-05-03 14:55:32,617 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:55:32,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:32,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:55:32,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:55:32,617 INFO L87 Difference]: Start difference. First operand 260 states and 780 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:32,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:32,737 INFO L93 Difference]: Finished difference Result 588 states and 1723 transitions. [2021-05-03 14:55:32,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:32,737 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:32,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:32,738 INFO L225 Difference]: With dead ends: 588 [2021-05-03 14:55:32,738 INFO L226 Difference]: Without dead ends: 588 [2021-05-03 14:55:32,738 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 68.4ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:32,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-05-03 14:55:32,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 266. [2021-05-03 14:55:32,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 3.0113207547169814) internal successors, (798), 265 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:32,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 798 transitions. [2021-05-03 14:55:32,742 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 798 transitions. Word has length 19 [2021-05-03 14:55:32,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:32,742 INFO L480 AbstractCegarLoop]: Abstraction has 266 states and 798 transitions. [2021-05-03 14:55:32,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:32,742 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 798 transitions. [2021-05-03 14:55:32,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:32,743 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:32,743 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:32,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable597 [2021-05-03 14:55:32,943 INFO L428 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:32,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:32,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1036563747, now seen corresponding path program 35 times [2021-05-03 14:55:32,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:32,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691870331] [2021-05-03 14:55:32,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:32,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:32,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:32,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691870331] [2021-05-03 14:55:32,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174448474] [2021-05-03 14:55:32,975 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:32,995 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:55:32,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:32,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:32,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:33,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:33,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:33,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 14:55:33,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251782882] [2021-05-03 14:55:33,049 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:55:33,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:33,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:55:33,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:55:33,050 INFO L87 Difference]: Start difference. First operand 266 states and 798 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:33,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:33,150 INFO L93 Difference]: Finished difference Result 527 states and 1532 transitions. [2021-05-03 14:55:33,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:33,151 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:33,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:33,151 INFO L225 Difference]: With dead ends: 527 [2021-05-03 14:55:33,151 INFO L226 Difference]: Without dead ends: 521 [2021-05-03 14:55:33,152 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 70.8ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:55:33,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-05-03 14:55:33,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 278. [2021-05-03 14:55:33,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 3.0216606498194944) internal successors, (837), 277 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:33,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 837 transitions. [2021-05-03 14:55:33,156 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 837 transitions. Word has length 19 [2021-05-03 14:55:33,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:33,156 INFO L480 AbstractCegarLoop]: Abstraction has 278 states and 837 transitions. [2021-05-03 14:55:33,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:33,156 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 837 transitions. [2021-05-03 14:55:33,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:33,156 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:33,156 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:33,365 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-05-03 14:55:33,365 INFO L428 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:33,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:33,365 INFO L82 PathProgramCache]: Analyzing trace with hash 2043043929, now seen corresponding path program 36 times [2021-05-03 14:55:33,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:33,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535742329] [2021-05-03 14:55:33,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:33,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:33,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:33,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535742329] [2021-05-03 14:55:33,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178223594] [2021-05-03 14:55:33,438 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:33,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 14:55:33,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:33,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:33,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:33,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:33,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:33,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 14:55:33,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645244562] [2021-05-03 14:55:33,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:55:33,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:33,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:55:33,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:55:33,513 INFO L87 Difference]: Start difference. First operand 278 states and 837 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:33,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:33,629 INFO L93 Difference]: Finished difference Result 505 states and 1485 transitions. [2021-05-03 14:55:33,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:33,630 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:33,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:33,631 INFO L225 Difference]: With dead ends: 505 [2021-05-03 14:55:33,631 INFO L226 Difference]: Without dead ends: 505 [2021-05-03 14:55:33,631 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 96.1ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:55:33,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-05-03 14:55:33,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 260. [2021-05-03 14:55:33,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 3.011583011583012) internal successors, (780), 259 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:33,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 780 transitions. [2021-05-03 14:55:33,634 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 780 transitions. Word has length 19 [2021-05-03 14:55:33,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:33,635 INFO L480 AbstractCegarLoop]: Abstraction has 260 states and 780 transitions. [2021-05-03 14:55:33,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:33,635 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 780 transitions. [2021-05-03 14:55:33,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:33,635 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:33,635 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:33,835 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable601 [2021-05-03 14:55:33,835 INFO L428 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:33,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:33,836 INFO L82 PathProgramCache]: Analyzing trace with hash -695873807, now seen corresponding path program 37 times [2021-05-03 14:55:33,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:33,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993968642] [2021-05-03 14:55:33,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:33,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:33,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:33,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993968642] [2021-05-03 14:55:33,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:33,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:33,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217320184] [2021-05-03 14:55:33,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:33,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:33,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:33,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:33,871 INFO L87 Difference]: Start difference. First operand 260 states and 780 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:33,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:33,972 INFO L93 Difference]: Finished difference Result 507 states and 1464 transitions. [2021-05-03 14:55:33,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:33,972 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:33,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:33,973 INFO L225 Difference]: With dead ends: 507 [2021-05-03 14:55:33,973 INFO L226 Difference]: Without dead ends: 499 [2021-05-03 14:55:33,973 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 57.7ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:55:33,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-05-03 14:55:33,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 272. [2021-05-03 14:55:33,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 3.047970479704797) internal successors, (826), 271 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:33,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 826 transitions. [2021-05-03 14:55:33,977 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 826 transitions. Word has length 19 [2021-05-03 14:55:33,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:33,977 INFO L480 AbstractCegarLoop]: Abstraction has 272 states and 826 transitions. [2021-05-03 14:55:33,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:33,977 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 826 transitions. [2021-05-03 14:55:33,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:33,978 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:33,978 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:33,978 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable602 [2021-05-03 14:55:33,978 INFO L428 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:33,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:33,978 INFO L82 PathProgramCache]: Analyzing trace with hash -315136167, now seen corresponding path program 38 times [2021-05-03 14:55:33,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:33,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329130543] [2021-05-03 14:55:33,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:33,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:34,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:34,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329130543] [2021-05-03 14:55:34,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:34,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:34,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745776488] [2021-05-03 14:55:34,013 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:34,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:34,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:34,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:34,013 INFO L87 Difference]: Start difference. First operand 272 states and 826 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:34,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:34,109 INFO L93 Difference]: Finished difference Result 497 states and 1439 transitions. [2021-05-03 14:55:34,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:34,109 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:34,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:34,110 INFO L225 Difference]: With dead ends: 497 [2021-05-03 14:55:34,110 INFO L226 Difference]: Without dead ends: 489 [2021-05-03 14:55:34,110 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 57.7ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:55:34,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-05-03 14:55:34,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 276. [2021-05-03 14:55:34,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.036363636363636) internal successors, (835), 275 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:34,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 835 transitions. [2021-05-03 14:55:34,114 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 835 transitions. Word has length 19 [2021-05-03 14:55:34,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:34,114 INFO L480 AbstractCegarLoop]: Abstraction has 276 states and 835 transitions. [2021-05-03 14:55:34,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:34,114 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 835 transitions. [2021-05-03 14:55:34,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:34,115 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:34,115 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:34,115 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable603 [2021-05-03 14:55:34,115 INFO L428 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:34,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:34,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1236489122, now seen corresponding path program 37 times [2021-05-03 14:55:34,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:34,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416856970] [2021-05-03 14:55:34,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:34,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:34,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:34,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416856970] [2021-05-03 14:55:34,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540438512] [2021-05-03 14:55:34,156 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:34,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:34,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:34,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:34,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:34,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:34,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:55:34,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977129445] [2021-05-03 14:55:34,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:55:34,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:34,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:55:34,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:34,256 INFO L87 Difference]: Start difference. First operand 276 states and 835 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:34,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:34,375 INFO L93 Difference]: Finished difference Result 591 states and 1709 transitions. [2021-05-03 14:55:34,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:34,376 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:34,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:34,377 INFO L225 Difference]: With dead ends: 591 [2021-05-03 14:55:34,377 INFO L226 Difference]: Without dead ends: 591 [2021-05-03 14:55:34,377 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 100.7ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:55:34,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-05-03 14:55:34,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 282. [2021-05-03 14:55:34,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 3.0676156583629894) internal successors, (862), 281 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:34,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 862 transitions. [2021-05-03 14:55:34,383 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 862 transitions. Word has length 19 [2021-05-03 14:55:34,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:34,383 INFO L480 AbstractCegarLoop]: Abstraction has 282 states and 862 transitions. [2021-05-03 14:55:34,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:34,383 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 862 transitions. [2021-05-03 14:55:34,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:34,384 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:34,384 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:34,584 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable604 [2021-05-03 14:55:34,584 INFO L428 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:34,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:34,585 INFO L82 PathProgramCache]: Analyzing trace with hash -2128316998, now seen corresponding path program 38 times [2021-05-03 14:55:34,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:34,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545832245] [2021-05-03 14:55:34,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:34,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:34,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:34,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545832245] [2021-05-03 14:55:34,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715551924] [2021-05-03 14:55:34,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:34,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:55:34,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:34,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:34,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:34,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:34,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:34,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:55:34,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900099591] [2021-05-03 14:55:34,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:55:34,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:34,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:55:34,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:34,722 INFO L87 Difference]: Start difference. First operand 282 states and 862 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:34,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:34,837 INFO L93 Difference]: Finished difference Result 573 states and 1640 transitions. [2021-05-03 14:55:34,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:34,838 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:34,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:34,839 INFO L225 Difference]: With dead ends: 573 [2021-05-03 14:55:34,839 INFO L226 Difference]: Without dead ends: 567 [2021-05-03 14:55:34,839 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 94.2ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:55:34,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-05-03 14:55:34,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 281. [2021-05-03 14:55:34,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 3.0607142857142855) internal successors, (857), 280 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:34,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 857 transitions. [2021-05-03 14:55:34,843 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 857 transitions. Word has length 19 [2021-05-03 14:55:34,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:34,843 INFO L480 AbstractCegarLoop]: Abstraction has 281 states and 857 transitions. [2021-05-03 14:55:34,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:34,843 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 857 transitions. [2021-05-03 14:55:34,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:34,844 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:34,844 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:35,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable605,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:35,044 INFO L428 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:35,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:35,045 INFO L82 PathProgramCache]: Analyzing trace with hash -900007947, now seen corresponding path program 39 times [2021-05-03 14:55:35,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:35,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109776372] [2021-05-03 14:55:35,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:35,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:35,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:35,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109776372] [2021-05-03 14:55:35,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033212702] [2021-05-03 14:55:35,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:35,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 14:55:35,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:35,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:35,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:35,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:35,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:35,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 14:55:35,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757874784] [2021-05-03 14:55:35,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:55:35,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:35,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:55:35,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:55:35,192 INFO L87 Difference]: Start difference. First operand 281 states and 857 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:35,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:35,301 INFO L93 Difference]: Finished difference Result 558 states and 1599 transitions. [2021-05-03 14:55:35,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:35,301 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:35,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:35,302 INFO L225 Difference]: With dead ends: 558 [2021-05-03 14:55:35,302 INFO L226 Difference]: Without dead ends: 550 [2021-05-03 14:55:35,302 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 98.2ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:55:35,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-05-03 14:55:35,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 281. [2021-05-03 14:55:35,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 3.0714285714285716) internal successors, (860), 280 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:35,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 860 transitions. [2021-05-03 14:55:35,313 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 860 transitions. Word has length 19 [2021-05-03 14:55:35,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:35,313 INFO L480 AbstractCegarLoop]: Abstraction has 281 states and 860 transitions. [2021-05-03 14:55:35,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:35,313 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 860 transitions. [2021-05-03 14:55:35,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:35,313 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:35,313 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:35,539 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable608,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:35,539 INFO L428 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:35,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:35,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1436888778, now seen corresponding path program 39 times [2021-05-03 14:55:35,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:35,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001701033] [2021-05-03 14:55:35,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:35,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:35,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:35,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001701033] [2021-05-03 14:55:35,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258896484] [2021-05-03 14:55:35,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:35,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:55:35,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:35,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:35,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:35,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:35,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:35,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:55:35,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241789122] [2021-05-03 14:55:35,685 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:55:35,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:35,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:55:35,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:35,686 INFO L87 Difference]: Start difference. First operand 281 states and 860 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:35,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:35,798 INFO L93 Difference]: Finished difference Result 621 states and 1765 transitions. [2021-05-03 14:55:35,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:35,798 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:35,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:35,799 INFO L225 Difference]: With dead ends: 621 [2021-05-03 14:55:35,799 INFO L226 Difference]: Without dead ends: 621 [2021-05-03 14:55:35,799 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 98.4ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:55:35,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-05-03 14:55:35,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 272. [2021-05-03 14:55:35,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 3.062730627306273) internal successors, (830), 271 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:35,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 830 transitions. [2021-05-03 14:55:35,803 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 830 transitions. Word has length 19 [2021-05-03 14:55:35,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:35,803 INFO L480 AbstractCegarLoop]: Abstraction has 272 states and 830 transitions. [2021-05-03 14:55:35,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:35,803 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 830 transitions. [2021-05-03 14:55:35,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:35,803 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:35,803 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:36,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable611 [2021-05-03 14:55:36,004 INFO L428 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:36,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:36,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1355648106, now seen corresponding path program 40 times [2021-05-03 14:55:36,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:36,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134596044] [2021-05-03 14:55:36,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:36,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:36,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:36,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134596044] [2021-05-03 14:55:36,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977461295] [2021-05-03 14:55:36,046 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:36,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:55:36,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:36,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:36,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:36,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:36,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:36,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:55:36,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135515747] [2021-05-03 14:55:36,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:55:36,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:36,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:55:36,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:36,160 INFO L87 Difference]: Start difference. First operand 272 states and 830 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:36,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:36,267 INFO L93 Difference]: Finished difference Result 576 states and 1637 transitions. [2021-05-03 14:55:36,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:36,267 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:36,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:36,268 INFO L225 Difference]: With dead ends: 576 [2021-05-03 14:55:36,268 INFO L226 Difference]: Without dead ends: 567 [2021-05-03 14:55:36,268 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 101.1ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:55:36,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-05-03 14:55:36,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 272. [2021-05-03 14:55:36,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 3.047970479704797) internal successors, (826), 271 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:36,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 826 transitions. [2021-05-03 14:55:36,272 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 826 transitions. Word has length 19 [2021-05-03 14:55:36,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:36,272 INFO L480 AbstractCegarLoop]: Abstraction has 272 states and 826 transitions. [2021-05-03 14:55:36,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:36,272 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 826 transitions. [2021-05-03 14:55:36,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:36,273 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:36,273 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:36,473 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable612,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:36,473 INFO L428 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:36,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:36,474 INFO L82 PathProgramCache]: Analyzing trace with hash -620013387, now seen corresponding path program 40 times [2021-05-03 14:55:36,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:36,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133893403] [2021-05-03 14:55:36,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:36,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:36,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:36,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133893403] [2021-05-03 14:55:36,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779511023] [2021-05-03 14:55:36,513 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:36,534 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:55:36,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:36,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:36,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:36,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:36,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:36,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 14:55:36,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383776040] [2021-05-03 14:55:36,617 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:55:36,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:36,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:55:36,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:55:36,618 INFO L87 Difference]: Start difference. First operand 272 states and 826 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:36,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:36,762 INFO L93 Difference]: Finished difference Result 530 states and 1549 transitions. [2021-05-03 14:55:36,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:36,770 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:36,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:36,771 INFO L225 Difference]: With dead ends: 530 [2021-05-03 14:55:36,771 INFO L226 Difference]: Without dead ends: 530 [2021-05-03 14:55:36,771 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 86.7ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:55:36,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-05-03 14:55:36,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 264. [2021-05-03 14:55:36,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 3.0190114068441063) internal successors, (794), 263 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:36,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 794 transitions. [2021-05-03 14:55:36,775 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 794 transitions. Word has length 19 [2021-05-03 14:55:36,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:36,775 INFO L480 AbstractCegarLoop]: Abstraction has 264 states and 794 transitions. [2021-05-03 14:55:36,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:36,776 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 794 transitions. [2021-05-03 14:55:36,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:36,776 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:36,776 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:36,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable615,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:36,976 INFO L428 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:36,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:36,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1979491946, now seen corresponding path program 41 times [2021-05-03 14:55:36,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:36,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892786706] [2021-05-03 14:55:36,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:36,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:37,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:37,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892786706] [2021-05-03 14:55:37,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:37,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:37,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297356166] [2021-05-03 14:55:37,015 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:37,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:37,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:37,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:37,016 INFO L87 Difference]: Start difference. First operand 264 states and 794 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:37,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:37,111 INFO L93 Difference]: Finished difference Result 551 states and 1548 transitions. [2021-05-03 14:55:37,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:37,112 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:37,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:37,113 INFO L225 Difference]: With dead ends: 551 [2021-05-03 14:55:37,113 INFO L226 Difference]: Without dead ends: 545 [2021-05-03 14:55:37,113 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 58.7ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:55:37,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-05-03 14:55:37,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 274. [2021-05-03 14:55:37,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 3.0) internal successors, (819), 273 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:37,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 819 transitions. [2021-05-03 14:55:37,117 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 819 transitions. Word has length 19 [2021-05-03 14:55:37,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:37,117 INFO L480 AbstractCegarLoop]: Abstraction has 274 states and 819 transitions. [2021-05-03 14:55:37,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:37,117 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 819 transitions. [2021-05-03 14:55:37,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:37,118 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:37,118 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:37,118 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable616 [2021-05-03 14:55:37,118 INFO L428 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:37,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:37,118 INFO L82 PathProgramCache]: Analyzing trace with hash 877577794, now seen corresponding path program 42 times [2021-05-03 14:55:37,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:37,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30880018] [2021-05-03 14:55:37,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:37,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:37,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:37,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30880018] [2021-05-03 14:55:37,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:37,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:37,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76848690] [2021-05-03 14:55:37,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:37,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:37,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:37,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:37,157 INFO L87 Difference]: Start difference. First operand 274 states and 819 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:37,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:37,248 INFO L93 Difference]: Finished difference Result 515 states and 1465 transitions. [2021-05-03 14:55:37,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:37,249 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:37,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:37,249 INFO L225 Difference]: With dead ends: 515 [2021-05-03 14:55:37,249 INFO L226 Difference]: Without dead ends: 504 [2021-05-03 14:55:37,250 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 61.1ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:55:37,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-05-03 14:55:37,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 264. [2021-05-03 14:55:37,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 3.0152091254752853) internal successors, (793), 263 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:37,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 793 transitions. [2021-05-03 14:55:37,253 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 793 transitions. Word has length 19 [2021-05-03 14:55:37,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:37,253 INFO L480 AbstractCegarLoop]: Abstraction has 264 states and 793 transitions. [2021-05-03 14:55:37,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:37,254 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 793 transitions. [2021-05-03 14:55:37,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:37,254 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:37,254 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:37,254 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable617 [2021-05-03 14:55:37,254 INFO L428 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:37,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:37,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1591463139, now seen corresponding path program 41 times [2021-05-03 14:55:37,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:37,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486210548] [2021-05-03 14:55:37,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:37,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:37,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:37,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486210548] [2021-05-03 14:55:37,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:37,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:37,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739014266] [2021-05-03 14:55:37,289 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:37,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:37,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:37,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:37,289 INFO L87 Difference]: Start difference. First operand 264 states and 793 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:37,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:37,403 INFO L93 Difference]: Finished difference Result 504 states and 1450 transitions. [2021-05-03 14:55:37,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:37,404 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:37,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:37,405 INFO L225 Difference]: With dead ends: 504 [2021-05-03 14:55:37,405 INFO L226 Difference]: Without dead ends: 498 [2021-05-03 14:55:37,405 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 59.2ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:55:37,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-05-03 14:55:37,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 276. [2021-05-03 14:55:37,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.018181818181818) internal successors, (830), 275 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:37,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 830 transitions. [2021-05-03 14:55:37,409 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 830 transitions. Word has length 19 [2021-05-03 14:55:37,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:37,409 INFO L480 AbstractCegarLoop]: Abstraction has 276 states and 830 transitions. [2021-05-03 14:55:37,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:37,409 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 830 transitions. [2021-05-03 14:55:37,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:37,410 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:37,410 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:37,410 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable618 [2021-05-03 14:55:37,410 INFO L428 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:37,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:37,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1320953447, now seen corresponding path program 42 times [2021-05-03 14:55:37,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:37,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697514016] [2021-05-03 14:55:37,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:37,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:37,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:37,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697514016] [2021-05-03 14:55:37,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:37,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:37,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631828589] [2021-05-03 14:55:37,450 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:37,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:37,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:37,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:37,450 INFO L87 Difference]: Start difference. First operand 276 states and 830 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:37,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:37,582 INFO L93 Difference]: Finished difference Result 482 states and 1413 transitions. [2021-05-03 14:55:37,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:37,583 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:37,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:37,584 INFO L225 Difference]: With dead ends: 482 [2021-05-03 14:55:37,584 INFO L226 Difference]: Without dead ends: 482 [2021-05-03 14:55:37,584 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 66.2ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:55:37,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-05-03 14:55:37,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 261. [2021-05-03 14:55:37,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 3.0153846153846153) internal successors, (784), 260 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:37,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 784 transitions. [2021-05-03 14:55:37,587 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 784 transitions. Word has length 19 [2021-05-03 14:55:37,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:37,588 INFO L480 AbstractCegarLoop]: Abstraction has 261 states and 784 transitions. [2021-05-03 14:55:37,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:37,588 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 784 transitions. [2021-05-03 14:55:37,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:37,588 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:37,588 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:37,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable619 [2021-05-03 14:55:37,588 INFO L428 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:37,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:37,588 INFO L82 PathProgramCache]: Analyzing trace with hash -549537380, now seen corresponding path program 43 times [2021-05-03 14:55:37,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:37,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164608384] [2021-05-03 14:55:37,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:37,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:37,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:37,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164608384] [2021-05-03 14:55:37,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:37,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:37,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124168472] [2021-05-03 14:55:37,624 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:37,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:37,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:37,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:37,625 INFO L87 Difference]: Start difference. First operand 261 states and 784 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:37,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:37,709 INFO L93 Difference]: Finished difference Result 407 states and 1153 transitions. [2021-05-03 14:55:37,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:37,710 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:37,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:37,711 INFO L225 Difference]: With dead ends: 407 [2021-05-03 14:55:37,711 INFO L226 Difference]: Without dead ends: 383 [2021-05-03 14:55:37,711 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 64.3ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:37,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-05-03 14:55:37,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 265. [2021-05-03 14:55:37,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.992424242424242) internal successors, (790), 264 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:37,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 790 transitions. [2021-05-03 14:55:37,714 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 790 transitions. Word has length 19 [2021-05-03 14:55:37,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:37,714 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 790 transitions. [2021-05-03 14:55:37,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:37,714 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 790 transitions. [2021-05-03 14:55:37,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:37,715 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:37,715 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:37,715 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable620 [2021-05-03 14:55:37,715 INFO L428 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:37,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:37,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1404112814, now seen corresponding path program 44 times [2021-05-03 14:55:37,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:37,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956670851] [2021-05-03 14:55:37,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:37,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:37,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:37,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956670851] [2021-05-03 14:55:37,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:37,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:37,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217600146] [2021-05-03 14:55:37,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:37,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:37,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:37,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:37,751 INFO L87 Difference]: Start difference. First operand 265 states and 790 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:37,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:37,856 INFO L93 Difference]: Finished difference Result 430 states and 1198 transitions. [2021-05-03 14:55:37,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:37,856 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:37,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:37,857 INFO L225 Difference]: With dead ends: 430 [2021-05-03 14:55:37,857 INFO L226 Difference]: Without dead ends: 424 [2021-05-03 14:55:37,857 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 76.8ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:37,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-05-03 14:55:37,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 275. [2021-05-03 14:55:37,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.9744525547445257) internal successors, (815), 274 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:37,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 815 transitions. [2021-05-03 14:55:37,861 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 815 transitions. Word has length 19 [2021-05-03 14:55:37,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:37,861 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 815 transitions. [2021-05-03 14:55:37,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:37,861 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 815 transitions. [2021-05-03 14:55:37,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:37,861 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:37,861 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:37,861 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable621 [2021-05-03 14:55:37,861 INFO L428 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:37,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:37,862 INFO L82 PathProgramCache]: Analyzing trace with hash -986737450, now seen corresponding path program 45 times [2021-05-03 14:55:37,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:37,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288695329] [2021-05-03 14:55:37,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:37,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:37,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:37,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288695329] [2021-05-03 14:55:37,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:37,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:37,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219596798] [2021-05-03 14:55:37,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:37,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:37,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:37,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:37,897 INFO L87 Difference]: Start difference. First operand 275 states and 815 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:38,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:38,020 INFO L93 Difference]: Finished difference Result 394 states and 1115 transitions. [2021-05-03 14:55:38,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:38,021 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:38,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:38,021 INFO L225 Difference]: With dead ends: 394 [2021-05-03 14:55:38,021 INFO L226 Difference]: Without dead ends: 379 [2021-05-03 14:55:38,021 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 88.8ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:38,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-05-03 14:55:38,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 261. [2021-05-03 14:55:38,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 3.0) internal successors, (780), 260 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:38,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 780 transitions. [2021-05-03 14:55:38,025 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 780 transitions. Word has length 19 [2021-05-03 14:55:38,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:38,025 INFO L480 AbstractCegarLoop]: Abstraction has 261 states and 780 transitions. [2021-05-03 14:55:38,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:38,025 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 780 transitions. [2021-05-03 14:55:38,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:38,025 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:38,025 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:38,025 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable622 [2021-05-03 14:55:38,025 INFO L428 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:38,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:38,025 INFO L82 PathProgramCache]: Analyzing trace with hash 879484852, now seen corresponding path program 46 times [2021-05-03 14:55:38,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:38,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069065587] [2021-05-03 14:55:38,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:38,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:38,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:38,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069065587] [2021-05-03 14:55:38,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:38,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:38,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665810256] [2021-05-03 14:55:38,062 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:38,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:38,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:38,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:38,063 INFO L87 Difference]: Start difference. First operand 261 states and 780 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:38,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:38,150 INFO L93 Difference]: Finished difference Result 393 states and 1118 transitions. [2021-05-03 14:55:38,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:38,151 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:38,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:38,152 INFO L225 Difference]: With dead ends: 393 [2021-05-03 14:55:38,152 INFO L226 Difference]: Without dead ends: 381 [2021-05-03 14:55:38,152 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 68.1ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:38,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-05-03 14:55:38,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 263. [2021-05-03 14:55:38,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.9885496183206106) internal successors, (783), 262 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:38,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 783 transitions. [2021-05-03 14:55:38,155 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 783 transitions. Word has length 19 [2021-05-03 14:55:38,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:38,155 INFO L480 AbstractCegarLoop]: Abstraction has 263 states and 783 transitions. [2021-05-03 14:55:38,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:38,156 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 783 transitions. [2021-05-03 14:55:38,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:38,156 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:38,156 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:38,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable623 [2021-05-03 14:55:38,156 INFO L428 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:38,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:38,156 INFO L82 PathProgramCache]: Analyzing trace with hash 199463632, now seen corresponding path program 47 times [2021-05-03 14:55:38,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:38,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558130151] [2021-05-03 14:55:38,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:38,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:38,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:38,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558130151] [2021-05-03 14:55:38,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:38,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:38,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302969455] [2021-05-03 14:55:38,193 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:38,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:38,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:38,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:38,193 INFO L87 Difference]: Start difference. First operand 263 states and 783 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:38,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:38,303 INFO L93 Difference]: Finished difference Result 381 states and 1080 transitions. [2021-05-03 14:55:38,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:38,303 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:38,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:38,304 INFO L225 Difference]: With dead ends: 381 [2021-05-03 14:55:38,304 INFO L226 Difference]: Without dead ends: 375 [2021-05-03 14:55:38,304 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 82.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:38,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-05-03 14:55:38,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 273. [2021-05-03 14:55:38,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 2.9705882352941178) internal successors, (808), 272 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:38,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 808 transitions. [2021-05-03 14:55:38,307 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 808 transitions. Word has length 19 [2021-05-03 14:55:38,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:38,307 INFO L480 AbstractCegarLoop]: Abstraction has 273 states and 808 transitions. [2021-05-03 14:55:38,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:38,307 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 808 transitions. [2021-05-03 14:55:38,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:38,308 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:38,308 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:38,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable624 [2021-05-03 14:55:38,308 INFO L428 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:38,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:38,308 INFO L82 PathProgramCache]: Analyzing trace with hash 2103580664, now seen corresponding path program 48 times [2021-05-03 14:55:38,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:38,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848931112] [2021-05-03 14:55:38,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:38,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:38,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:38,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848931112] [2021-05-03 14:55:38,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:38,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:38,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334040782] [2021-05-03 14:55:38,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:38,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:38,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:38,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:38,343 INFO L87 Difference]: Start difference. First operand 273 states and 808 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:38,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:38,440 INFO L93 Difference]: Finished difference Result 345 states and 997 transitions. [2021-05-03 14:55:38,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:38,441 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:38,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:38,441 INFO L225 Difference]: With dead ends: 345 [2021-05-03 14:55:38,442 INFO L226 Difference]: Without dead ends: 328 [2021-05-03 14:55:38,442 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 77.8ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:38,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-05-03 14:55:38,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 257. [2021-05-03 14:55:38,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 3.015625) internal successors, (772), 256 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:38,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 772 transitions. [2021-05-03 14:55:38,445 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 772 transitions. Word has length 19 [2021-05-03 14:55:38,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:38,445 INFO L480 AbstractCegarLoop]: Abstraction has 257 states and 772 transitions. [2021-05-03 14:55:38,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:38,445 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 772 transitions. [2021-05-03 14:55:38,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:38,445 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:38,445 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:38,445 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable625 [2021-05-03 14:55:38,445 INFO L428 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:38,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:38,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1070480311, now seen corresponding path program 43 times [2021-05-03 14:55:38,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:38,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601115503] [2021-05-03 14:55:38,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:38,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:38,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:38,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601115503] [2021-05-03 14:55:38,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654511647] [2021-05-03 14:55:38,479 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:38,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:38,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:38,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:38,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:38,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:38,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-03 14:55:38,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239416231] [2021-05-03 14:55:38,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:55:38,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:38,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:55:38,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:55:38,549 INFO L87 Difference]: Start difference. First operand 257 states and 772 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:38,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:38,679 INFO L93 Difference]: Finished difference Result 449 states and 1320 transitions. [2021-05-03 14:55:38,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:38,679 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:38,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:38,680 INFO L225 Difference]: With dead ends: 449 [2021-05-03 14:55:38,680 INFO L226 Difference]: Without dead ends: 449 [2021-05-03 14:55:38,680 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 74.9ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:55:38,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-05-03 14:55:38,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 235. [2021-05-03 14:55:38,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 3.0213675213675213) internal successors, (707), 234 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:38,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 707 transitions. [2021-05-03 14:55:38,684 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 707 transitions. Word has length 19 [2021-05-03 14:55:38,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:38,684 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 707 transitions. [2021-05-03 14:55:38,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:38,684 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 707 transitions. [2021-05-03 14:55:38,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:38,684 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:38,684 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:38,884 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable626,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:38,885 INFO L428 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:38,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:38,885 INFO L82 PathProgramCache]: Analyzing trace with hash 170307403, now seen corresponding path program 44 times [2021-05-03 14:55:38,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:38,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184667099] [2021-05-03 14:55:38,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:38,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:38,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:38,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184667099] [2021-05-03 14:55:38,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657151573] [2021-05-03 14:55:38,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:38,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:55:38,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:38,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:38,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:39,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:39,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:39,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 14:55:39,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038041779] [2021-05-03 14:55:39,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:55:39,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:39,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:55:39,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:55:39,041 INFO L87 Difference]: Start difference. First operand 235 states and 707 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:39,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:39,156 INFO L93 Difference]: Finished difference Result 437 states and 1251 transitions. [2021-05-03 14:55:39,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:39,157 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:39,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:39,157 INFO L225 Difference]: With dead ends: 437 [2021-05-03 14:55:39,158 INFO L226 Difference]: Without dead ends: 431 [2021-05-03 14:55:39,158 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 79.4ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:55:39,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-05-03 14:55:39,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 241. [2021-05-03 14:55:39,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 3.004166666666667) internal successors, (721), 240 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:39,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 721 transitions. [2021-05-03 14:55:39,161 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 721 transitions. Word has length 19 [2021-05-03 14:55:39,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:39,161 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 721 transitions. [2021-05-03 14:55:39,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:39,161 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 721 transitions. [2021-05-03 14:55:39,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:39,162 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:39,162 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:39,362 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable627 [2021-05-03 14:55:39,362 INFO L428 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:39,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:39,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1045052217, now seen corresponding path program 45 times [2021-05-03 14:55:39,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:39,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366633252] [2021-05-03 14:55:39,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:39,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:39,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:39,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366633252] [2021-05-03 14:55:39,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174551870] [2021-05-03 14:55:39,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:39,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 14:55:39,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:39,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:39,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:39,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:39,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:39,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 14:55:39,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972694386] [2021-05-03 14:55:39,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:55:39,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:39,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:55:39,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:55:39,481 INFO L87 Difference]: Start difference. First operand 241 states and 721 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:39,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:39,598 INFO L93 Difference]: Finished difference Result 415 states and 1214 transitions. [2021-05-03 14:55:39,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:39,599 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:39,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:39,599 INFO L225 Difference]: With dead ends: 415 [2021-05-03 14:55:39,599 INFO L226 Difference]: Without dead ends: 415 [2021-05-03 14:55:39,600 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 85.7ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:55:39,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-05-03 14:55:39,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 214. [2021-05-03 14:55:39,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 3.0) internal successors, (639), 213 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:39,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 639 transitions. [2021-05-03 14:55:39,603 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 639 transitions. Word has length 19 [2021-05-03 14:55:39,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:39,603 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 639 transitions. [2021-05-03 14:55:39,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:39,603 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 639 transitions. [2021-05-03 14:55:39,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:39,603 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:39,603 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:39,803 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable630 [2021-05-03 14:55:39,803 INFO L428 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:39,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:39,804 INFO L82 PathProgramCache]: Analyzing trace with hash -990658535, now seen corresponding path program 46 times [2021-05-03 14:55:39,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:39,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413296509] [2021-05-03 14:55:39,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:39,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:39,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:39,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413296509] [2021-05-03 14:55:39,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482945587] [2021-05-03 14:55:39,828 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:39,849 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:55:39,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:39,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:39,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:39,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:39,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:39,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 14:55:39,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628608361] [2021-05-03 14:55:39,916 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:55:39,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:39,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:55:39,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:55:39,917 INFO L87 Difference]: Start difference. First operand 214 states and 639 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:40,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:40,036 INFO L93 Difference]: Finished difference Result 367 states and 1064 transitions. [2021-05-03 14:55:40,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:40,037 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:40,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:40,037 INFO L225 Difference]: With dead ends: 367 [2021-05-03 14:55:40,037 INFO L226 Difference]: Without dead ends: 355 [2021-05-03 14:55:40,037 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 74.6ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:55:40,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-05-03 14:55:40,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 217. [2021-05-03 14:55:40,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 3.0) internal successors, (648), 216 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:40,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 648 transitions. [2021-05-03 14:55:40,043 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 648 transitions. Word has length 19 [2021-05-03 14:55:40,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:40,043 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 648 transitions. [2021-05-03 14:55:40,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:40,044 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 648 transitions. [2021-05-03 14:55:40,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:40,044 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:40,044 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:40,244 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable631 [2021-05-03 14:55:40,244 INFO L428 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:40,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:40,245 INFO L82 PathProgramCache]: Analyzing trace with hash -33107299, now seen corresponding path program 47 times [2021-05-03 14:55:40,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:40,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591559688] [2021-05-03 14:55:40,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:40,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:40,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:40,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591559688] [2021-05-03 14:55:40,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902772960] [2021-05-03 14:55:40,287 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:40,309 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:55:40,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:40,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:40,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:40,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:40,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:40,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 14:55:40,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283369901] [2021-05-03 14:55:40,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:55:40,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:40,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:55:40,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:55:40,383 INFO L87 Difference]: Start difference. First operand 217 states and 648 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:40,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:40,493 INFO L93 Difference]: Finished difference Result 355 states and 1025 transitions. [2021-05-03 14:55:40,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:40,494 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:40,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:40,494 INFO L225 Difference]: With dead ends: 355 [2021-05-03 14:55:40,494 INFO L226 Difference]: Without dead ends: 349 [2021-05-03 14:55:40,494 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 98.4ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:55:40,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-05-03 14:55:40,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 229. [2021-05-03 14:55:40,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 3.013157894736842) internal successors, (687), 228 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:40,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 687 transitions. [2021-05-03 14:55:40,497 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 687 transitions. Word has length 19 [2021-05-03 14:55:40,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:40,497 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 687 transitions. [2021-05-03 14:55:40,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:40,497 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 687 transitions. [2021-05-03 14:55:40,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:40,498 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:40,498 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:40,698 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable634,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:40,698 INFO L428 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:40,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:40,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1248466919, now seen corresponding path program 48 times [2021-05-03 14:55:40,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:40,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705189618] [2021-05-03 14:55:40,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:40,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:40,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:40,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705189618] [2021-05-03 14:55:40,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318372825] [2021-05-03 14:55:40,744 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:40,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 14:55:40,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:40,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:40,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:40,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:40,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:40,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 14:55:40,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145843911] [2021-05-03 14:55:40,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:55:40,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:40,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:55:40,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:55:40,832 INFO L87 Difference]: Start difference. First operand 229 states and 687 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:40,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:40,946 INFO L93 Difference]: Finished difference Result 320 states and 940 transitions. [2021-05-03 14:55:40,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:40,946 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:40,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:40,947 INFO L225 Difference]: With dead ends: 320 [2021-05-03 14:55:40,947 INFO L226 Difference]: Without dead ends: 320 [2021-05-03 14:55:40,947 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 105.0ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:55:40,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-05-03 14:55:40,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 215. [2021-05-03 14:55:40,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 3.0046728971962615) internal successors, (643), 214 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:40,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 643 transitions. [2021-05-03 14:55:40,950 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 643 transitions. Word has length 19 [2021-05-03 14:55:40,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:40,950 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 643 transitions. [2021-05-03 14:55:40,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:40,950 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 643 transitions. [2021-05-03 14:55:40,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:40,950 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:40,950 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:41,151 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable637,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:41,151 INFO L428 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:41,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:41,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1006159271, now seen corresponding path program 49 times [2021-05-03 14:55:41,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:41,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762762130] [2021-05-03 14:55:41,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:41,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:41,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:41,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762762130] [2021-05-03 14:55:41,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:41,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:41,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662050771] [2021-05-03 14:55:41,193 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:41,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:41,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:41,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:41,193 INFO L87 Difference]: Start difference. First operand 215 states and 643 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:41,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:41,327 INFO L93 Difference]: Finished difference Result 361 states and 1031 transitions. [2021-05-03 14:55:41,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:41,328 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:41,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:41,329 INFO L225 Difference]: With dead ends: 361 [2021-05-03 14:55:41,329 INFO L226 Difference]: Without dead ends: 353 [2021-05-03 14:55:41,329 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 102.8ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:41,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-05-03 14:55:41,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 233. [2021-05-03 14:55:41,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.9956896551724137) internal successors, (695), 232 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:41,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 695 transitions. [2021-05-03 14:55:41,332 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 695 transitions. Word has length 19 [2021-05-03 14:55:41,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:41,332 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 695 transitions. [2021-05-03 14:55:41,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:41,332 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 695 transitions. [2021-05-03 14:55:41,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:41,333 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:41,333 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:41,333 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable638 [2021-05-03 14:55:41,333 INFO L428 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:41,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:41,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1386896911, now seen corresponding path program 50 times [2021-05-03 14:55:41,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:41,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340381453] [2021-05-03 14:55:41,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:41,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:41,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:41,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340381453] [2021-05-03 14:55:41,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:41,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:41,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423023884] [2021-05-03 14:55:41,370 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:41,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:41,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:41,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:41,370 INFO L87 Difference]: Start difference. First operand 233 states and 695 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:41,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:41,527 INFO L93 Difference]: Finished difference Result 359 states and 1026 transitions. [2021-05-03 14:55:41,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:41,528 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:41,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:41,528 INFO L225 Difference]: With dead ends: 359 [2021-05-03 14:55:41,528 INFO L226 Difference]: Without dead ends: 351 [2021-05-03 14:55:41,528 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 126.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:41,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-05-03 14:55:41,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 231. [2021-05-03 14:55:41,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 2.991304347826087) internal successors, (688), 230 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:41,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 688 transitions. [2021-05-03 14:55:41,531 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 688 transitions. Word has length 19 [2021-05-03 14:55:41,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:41,531 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 688 transitions. [2021-05-03 14:55:41,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:41,531 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 688 transitions. [2021-05-03 14:55:41,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:41,532 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:41,532 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:41,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable639 [2021-05-03 14:55:41,532 INFO L428 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:41,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:41,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1984233569, now seen corresponding path program 51 times [2021-05-03 14:55:41,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:41,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46448527] [2021-05-03 14:55:41,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:41,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:41,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:41,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46448527] [2021-05-03 14:55:41,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:41,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:41,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888549738] [2021-05-03 14:55:41,566 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:41,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:41,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:41,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:41,567 INFO L87 Difference]: Start difference. First operand 231 states and 688 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:41,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:41,679 INFO L93 Difference]: Finished difference Result 373 states and 1067 transitions. [2021-05-03 14:55:41,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:41,679 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:41,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:41,680 INFO L225 Difference]: With dead ends: 373 [2021-05-03 14:55:41,680 INFO L226 Difference]: Without dead ends: 359 [2021-05-03 14:55:41,680 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 85.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:41,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-05-03 14:55:41,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-05-03 14:55:41,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.991228070175439) internal successors, (682), 228 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:41,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 682 transitions. [2021-05-03 14:55:41,683 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 682 transitions. Word has length 19 [2021-05-03 14:55:41,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:41,683 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 682 transitions. [2021-05-03 14:55:41,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:41,683 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 682 transitions. [2021-05-03 14:55:41,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:41,683 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:41,683 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:41,683 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable640 [2021-05-03 14:55:41,684 INFO L428 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:41,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:41,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1454990024, now seen corresponding path program 49 times [2021-05-03 14:55:41,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:41,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012847] [2021-05-03 14:55:41,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:41,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:41,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:41,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012847] [2021-05-03 14:55:41,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228396167] [2021-05-03 14:55:41,724 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:41,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:41,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:41,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:41,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:41,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:41,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:55:41,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373148458] [2021-05-03 14:55:41,820 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:55:41,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:41,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:55:41,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:41,821 INFO L87 Difference]: Start difference. First operand 229 states and 682 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:41,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:41,935 INFO L93 Difference]: Finished difference Result 461 states and 1330 transitions. [2021-05-03 14:55:41,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:41,935 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:41,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:41,936 INFO L225 Difference]: With dead ends: 461 [2021-05-03 14:55:41,936 INFO L226 Difference]: Without dead ends: 461 [2021-05-03 14:55:41,936 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 104.6ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:55:41,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-05-03 14:55:41,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 235. [2021-05-03 14:55:41,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 3.017094017094017) internal successors, (706), 234 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:41,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 706 transitions. [2021-05-03 14:55:41,942 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 706 transitions. Word has length 19 [2021-05-03 14:55:41,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:41,942 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 706 transitions. [2021-05-03 14:55:41,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:41,942 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 706 transitions. [2021-05-03 14:55:41,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:41,943 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:41,943 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:42,143 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable641 [2021-05-03 14:55:42,143 INFO L428 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:42,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:42,143 INFO L82 PathProgramCache]: Analyzing trace with hash -524828848, now seen corresponding path program 50 times [2021-05-03 14:55:42,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:42,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342040787] [2021-05-03 14:55:42,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:42,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:42,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:42,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342040787] [2021-05-03 14:55:42,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928925829] [2021-05-03 14:55:42,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:42,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:55:42,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:42,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:42,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:42,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:42,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:42,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:55:42,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832422325] [2021-05-03 14:55:42,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:55:42,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:42,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:55:42,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:42,292 INFO L87 Difference]: Start difference. First operand 235 states and 706 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:42,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:42,423 INFO L93 Difference]: Finished difference Result 467 states and 1339 transitions. [2021-05-03 14:55:42,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:42,423 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:42,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:42,424 INFO L225 Difference]: With dead ends: 467 [2021-05-03 14:55:42,424 INFO L226 Difference]: Without dead ends: 461 [2021-05-03 14:55:42,424 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 102.6ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:55:42,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-05-03 14:55:42,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 232. [2021-05-03 14:55:42,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 3.0043290043290045) internal successors, (694), 231 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:42,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 694 transitions. [2021-05-03 14:55:42,428 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 694 transitions. Word has length 19 [2021-05-03 14:55:42,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:42,428 INFO L480 AbstractCegarLoop]: Abstraction has 232 states and 694 transitions. [2021-05-03 14:55:42,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:42,428 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 694 transitions. [2021-05-03 14:55:42,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:42,428 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:42,428 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:42,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable642 [2021-05-03 14:55:42,629 INFO L428 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:42,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:42,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1537521380, now seen corresponding path program 51 times [2021-05-03 14:55:42,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:42,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896952424] [2021-05-03 14:55:42,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:42,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:42,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:42,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896952424] [2021-05-03 14:55:42,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675005038] [2021-05-03 14:55:42,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:42,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 14:55:42,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:42,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:42,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:42,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:42,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:42,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 14:55:42,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244630979] [2021-05-03 14:55:42,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:55:42,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:42,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:55:42,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:55:42,750 INFO L87 Difference]: Start difference. First operand 232 states and 694 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:42,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:42,852 INFO L93 Difference]: Finished difference Result 458 states and 1306 transitions. [2021-05-03 14:55:42,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:42,853 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:42,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:42,854 INFO L225 Difference]: With dead ends: 458 [2021-05-03 14:55:42,854 INFO L226 Difference]: Without dead ends: 446 [2021-05-03 14:55:42,854 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 87.3ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:55:42,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-05-03 14:55:42,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 230. [2021-05-03 14:55:42,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.995633187772926) internal successors, (686), 229 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:42,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 686 transitions. [2021-05-03 14:55:42,857 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 686 transitions. Word has length 19 [2021-05-03 14:55:42,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:42,857 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 686 transitions. [2021-05-03 14:55:42,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:42,857 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 686 transitions. [2021-05-03 14:55:42,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:42,858 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:42,858 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:43,058 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable645,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:43,058 INFO L428 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:43,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:43,058 INFO L82 PathProgramCache]: Analyzing trace with hash 242250915, now seen corresponding path program 52 times [2021-05-03 14:55:43,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:43,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860923986] [2021-05-03 14:55:43,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:43,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:43,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:43,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860923986] [2021-05-03 14:55:43,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:43,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:43,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791175076] [2021-05-03 14:55:43,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:43,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:43,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:43,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:43,096 INFO L87 Difference]: Start difference. First operand 230 states and 686 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:43,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:43,236 INFO L93 Difference]: Finished difference Result 403 states and 1125 transitions. [2021-05-03 14:55:43,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:43,236 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:43,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:43,237 INFO L225 Difference]: With dead ends: 403 [2021-05-03 14:55:43,237 INFO L226 Difference]: Without dead ends: 395 [2021-05-03 14:55:43,237 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 94.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:43,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-05-03 14:55:43,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 242. [2021-05-03 14:55:43,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 3.037344398340249) internal successors, (732), 241 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:43,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 732 transitions. [2021-05-03 14:55:43,240 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 732 transitions. Word has length 19 [2021-05-03 14:55:43,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:43,241 INFO L480 AbstractCegarLoop]: Abstraction has 242 states and 732 transitions. [2021-05-03 14:55:43,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:43,241 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 732 transitions. [2021-05-03 14:55:43,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:43,241 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:43,241 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:43,241 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable648 [2021-05-03 14:55:43,241 INFO L428 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:43,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:43,241 INFO L82 PathProgramCache]: Analyzing trace with hash 622988555, now seen corresponding path program 53 times [2021-05-03 14:55:43,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:43,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148101376] [2021-05-03 14:55:43,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:43,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:43,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:43,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148101376] [2021-05-03 14:55:43,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:43,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:43,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866797874] [2021-05-03 14:55:43,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:43,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:43,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:43,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:43,292 INFO L87 Difference]: Start difference. First operand 242 states and 732 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:43,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:43,432 INFO L93 Difference]: Finished difference Result 409 states and 1140 transitions. [2021-05-03 14:55:43,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:43,433 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:43,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:43,433 INFO L225 Difference]: With dead ends: 409 [2021-05-03 14:55:43,433 INFO L226 Difference]: Without dead ends: 401 [2021-05-03 14:55:43,433 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 111.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:43,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-05-03 14:55:43,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 244. [2021-05-03 14:55:43,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 3.02880658436214) internal successors, (736), 243 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:43,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 736 transitions. [2021-05-03 14:55:43,437 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 736 transitions. Word has length 19 [2021-05-03 14:55:43,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:43,437 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 736 transitions. [2021-05-03 14:55:43,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:43,437 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 736 transitions. [2021-05-03 14:55:43,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:43,437 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:43,437 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:43,437 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable649 [2021-05-03 14:55:43,437 INFO L428 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:43,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:43,438 INFO L82 PathProgramCache]: Analyzing trace with hash -2120353452, now seen corresponding path program 52 times [2021-05-03 14:55:43,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:43,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558714006] [2021-05-03 14:55:43,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:43,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:43,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:43,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558714006] [2021-05-03 14:55:43,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448305792] [2021-05-03 14:55:43,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:43,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:55:43,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:43,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:43,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:43,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:43,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:43,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:55:43,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646997423] [2021-05-03 14:55:43,604 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:55:43,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:43,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:55:43,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:43,604 INFO L87 Difference]: Start difference. First operand 244 states and 736 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:43,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:43,721 INFO L93 Difference]: Finished difference Result 532 states and 1524 transitions. [2021-05-03 14:55:43,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:43,721 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:43,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:43,722 INFO L225 Difference]: With dead ends: 532 [2021-05-03 14:55:43,722 INFO L226 Difference]: Without dead ends: 532 [2021-05-03 14:55:43,722 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 104.7ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:55:43,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-05-03 14:55:43,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 250. [2021-05-03 14:55:43,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 3.0642570281124497) internal successors, (763), 249 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:43,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 763 transitions. [2021-05-03 14:55:43,726 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 763 transitions. Word has length 19 [2021-05-03 14:55:43,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:43,726 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 763 transitions. [2021-05-03 14:55:43,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:43,726 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 763 transitions. [2021-05-03 14:55:43,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:43,727 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:43,727 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:43,927 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable650 [2021-05-03 14:55:43,927 INFO L428 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:43,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:43,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1190192276, now seen corresponding path program 53 times [2021-05-03 14:55:43,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:43,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047123584] [2021-05-03 14:55:43,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:43,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:43,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:43,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047123584] [2021-05-03 14:55:43,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189764590] [2021-05-03 14:55:43,966 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:43,987 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:55:43,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:43,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:43,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:44,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:44,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:44,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:55:44,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698864765] [2021-05-03 14:55:44,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:55:44,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:44,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:55:44,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:44,071 INFO L87 Difference]: Start difference. First operand 250 states and 763 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:44,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:44,198 INFO L93 Difference]: Finished difference Result 514 states and 1455 transitions. [2021-05-03 14:55:44,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:44,199 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:44,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:44,200 INFO L225 Difference]: With dead ends: 514 [2021-05-03 14:55:44,200 INFO L226 Difference]: Without dead ends: 508 [2021-05-03 14:55:44,200 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 98.0ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:55:44,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-05-03 14:55:44,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 249. [2021-05-03 14:55:44,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 3.056451612903226) internal successors, (758), 248 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:44,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 758 transitions. [2021-05-03 14:55:44,204 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 758 transitions. Word has length 19 [2021-05-03 14:55:44,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:44,204 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 758 transitions. [2021-05-03 14:55:44,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:44,204 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 758 transitions. [2021-05-03 14:55:44,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:44,204 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:44,204 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:44,404 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable651 [2021-05-03 14:55:44,405 INFO L428 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:44,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:44,405 INFO L82 PathProgramCache]: Analyzing trace with hash 38116775, now seen corresponding path program 54 times [2021-05-03 14:55:44,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:44,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991677776] [2021-05-03 14:55:44,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:44,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:44,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:44,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991677776] [2021-05-03 14:55:44,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746898488] [2021-05-03 14:55:44,443 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:44,465 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 14:55:44,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:44,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:44,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:44,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:44,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:44,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:55:44,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543778954] [2021-05-03 14:55:44,553 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:55:44,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:44,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:55:44,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:44,553 INFO L87 Difference]: Start difference. First operand 249 states and 758 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:44,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:44,677 INFO L93 Difference]: Finished difference Result 375 states and 1066 transitions. [2021-05-03 14:55:44,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:44,678 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:44,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:44,679 INFO L225 Difference]: With dead ends: 375 [2021-05-03 14:55:44,679 INFO L226 Difference]: Without dead ends: 367 [2021-05-03 14:55:44,679 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 97.3ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:55:44,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-05-03 14:55:44,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 249. [2021-05-03 14:55:44,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 3.068548387096774) internal successors, (761), 248 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:44,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 761 transitions. [2021-05-03 14:55:44,682 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 761 transitions. Word has length 19 [2021-05-03 14:55:44,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:44,682 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 761 transitions. [2021-05-03 14:55:44,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:44,682 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 761 transitions. [2021-05-03 14:55:44,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:44,682 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:44,682 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:44,883 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable654 [2021-05-03 14:55:44,883 INFO L428 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:44,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:44,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1919953796, now seen corresponding path program 54 times [2021-05-03 14:55:44,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:44,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134913746] [2021-05-03 14:55:44,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:44,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:44,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:44,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134913746] [2021-05-03 14:55:44,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717228625] [2021-05-03 14:55:44,925 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:44,947 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:55:44,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:44,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:44,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:45,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:45,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:45,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:55:45,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202608451] [2021-05-03 14:55:45,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:55:45,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:45,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:55:45,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:45,032 INFO L87 Difference]: Start difference. First operand 249 states and 761 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:45,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:45,152 INFO L93 Difference]: Finished difference Result 459 states and 1316 transitions. [2021-05-03 14:55:45,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:45,153 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:45,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:45,154 INFO L225 Difference]: With dead ends: 459 [2021-05-03 14:55:45,154 INFO L226 Difference]: Without dead ends: 459 [2021-05-03 14:55:45,154 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 102.4ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:55:45,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-05-03 14:55:45,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 240. [2021-05-03 14:55:45,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 3.0585774058577404) internal successors, (731), 239 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:45,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 731 transitions. [2021-05-03 14:55:45,157 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 731 transitions. Word has length 19 [2021-05-03 14:55:45,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:45,157 INFO L480 AbstractCegarLoop]: Abstraction has 240 states and 731 transitions. [2021-05-03 14:55:45,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:45,158 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 731 transitions. [2021-05-03 14:55:45,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:45,158 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:45,158 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:45,358 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable657 [2021-05-03 14:55:45,358 INFO L428 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:45,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:45,359 INFO L82 PathProgramCache]: Analyzing trace with hash -2001194468, now seen corresponding path program 55 times [2021-05-03 14:55:45,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:45,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17796509] [2021-05-03 14:55:45,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:45,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:45,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:45,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17796509] [2021-05-03 14:55:45,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599232759] [2021-05-03 14:55:45,427 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:45,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:45,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:45,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:45,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:45,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:45,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:55:45,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690076767] [2021-05-03 14:55:45,528 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:55:45,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:45,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:55:45,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:45,529 INFO L87 Difference]: Start difference. First operand 240 states and 731 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:45,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:45,644 INFO L93 Difference]: Finished difference Result 414 states and 1188 transitions. [2021-05-03 14:55:45,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:45,645 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:45,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:45,646 INFO L225 Difference]: With dead ends: 414 [2021-05-03 14:55:45,646 INFO L226 Difference]: Without dead ends: 405 [2021-05-03 14:55:45,646 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 96.0ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:55:45,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-05-03 14:55:45,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 240. [2021-05-03 14:55:45,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 3.0418410041841004) internal successors, (727), 239 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:45,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 727 transitions. [2021-05-03 14:55:45,649 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 727 transitions. Word has length 19 [2021-05-03 14:55:45,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:45,649 INFO L480 AbstractCegarLoop]: Abstraction has 240 states and 727 transitions. [2021-05-03 14:55:45,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:45,649 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 727 transitions. [2021-05-03 14:55:45,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:45,650 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:45,650 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:45,850 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable658 [2021-05-03 14:55:45,850 INFO L428 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:45,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:45,851 INFO L82 PathProgramCache]: Analyzing trace with hash 318111335, now seen corresponding path program 55 times [2021-05-03 14:55:45,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:45,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523657199] [2021-05-03 14:55:45,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:45,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:45,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:45,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523657199] [2021-05-03 14:55:45,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716917716] [2021-05-03 14:55:45,887 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:45,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:45,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:45,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:45,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:45,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:45,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:55:45,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114262759] [2021-05-03 14:55:45,979 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:55:45,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:45,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:55:45,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:45,979 INFO L87 Difference]: Start difference. First operand 240 states and 727 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:46,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:46,126 INFO L93 Difference]: Finished difference Result 347 states and 1016 transitions. [2021-05-03 14:55:46,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:46,126 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:46,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:46,127 INFO L225 Difference]: With dead ends: 347 [2021-05-03 14:55:46,127 INFO L226 Difference]: Without dead ends: 347 [2021-05-03 14:55:46,127 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 90.3ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:55:46,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-05-03 14:55:46,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 236. [2021-05-03 14:55:46,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 3.0425531914893615) internal successors, (715), 235 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:46,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 715 transitions. [2021-05-03 14:55:46,130 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 715 transitions. Word has length 19 [2021-05-03 14:55:46,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:46,130 INFO L480 AbstractCegarLoop]: Abstraction has 236 states and 715 transitions. [2021-05-03 14:55:46,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:46,130 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 715 transitions. [2021-05-03 14:55:46,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:46,131 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:46,131 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:46,331 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable661,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:46,331 INFO L428 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:46,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:46,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1377350628, now seen corresponding path program 56 times [2021-05-03 14:55:46,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:46,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659516772] [2021-05-03 14:55:46,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:46,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:46,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:46,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659516772] [2021-05-03 14:55:46,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:46,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:46,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850311957] [2021-05-03 14:55:46,380 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:46,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:46,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:46,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:46,381 INFO L87 Difference]: Start difference. First operand 236 states and 715 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:46,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:46,486 INFO L93 Difference]: Finished difference Result 452 states and 1270 transitions. [2021-05-03 14:55:46,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:46,486 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:46,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:46,487 INFO L225 Difference]: With dead ends: 452 [2021-05-03 14:55:46,487 INFO L226 Difference]: Without dead ends: 446 [2021-05-03 14:55:46,487 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 71.7ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:55:46,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-05-03 14:55:46,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 246. [2021-05-03 14:55:46,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 3.020408163265306) internal successors, (740), 245 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:46,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 740 transitions. [2021-05-03 14:55:46,491 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 740 transitions. Word has length 19 [2021-05-03 14:55:46,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:46,491 INFO L480 AbstractCegarLoop]: Abstraction has 246 states and 740 transitions. [2021-05-03 14:55:46,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:46,491 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 740 transitions. [2021-05-03 14:55:46,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:46,491 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:46,491 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:46,491 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable662 [2021-05-03 14:55:46,491 INFO L428 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:46,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:46,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1815702516, now seen corresponding path program 57 times [2021-05-03 14:55:46,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:46,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483837994] [2021-05-03 14:55:46,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:46,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:46,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:46,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483837994] [2021-05-03 14:55:46,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:46,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:46,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716503983] [2021-05-03 14:55:46,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:46,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:46,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:46,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:46,531 INFO L87 Difference]: Start difference. First operand 246 states and 740 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:46,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:46,619 INFO L93 Difference]: Finished difference Result 416 states and 1187 transitions. [2021-05-03 14:55:46,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:46,619 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:46,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:46,620 INFO L225 Difference]: With dead ends: 416 [2021-05-03 14:55:46,620 INFO L226 Difference]: Without dead ends: 405 [2021-05-03 14:55:46,620 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 59.7ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:55:46,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-05-03 14:55:46,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 236. [2021-05-03 14:55:46,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 3.0382978723404257) internal successors, (714), 235 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:46,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 714 transitions. [2021-05-03 14:55:46,623 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 714 transitions. Word has length 19 [2021-05-03 14:55:46,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:46,623 INFO L480 AbstractCegarLoop]: Abstraction has 236 states and 714 transitions. [2021-05-03 14:55:46,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:46,623 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 714 transitions. [2021-05-03 14:55:46,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:46,624 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:46,624 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:46,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable663 [2021-05-03 14:55:46,624 INFO L428 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:46,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:46,624 INFO L82 PathProgramCache]: Analyzing trace with hash -653338417, now seen corresponding path program 56 times [2021-05-03 14:55:46,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:46,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313427279] [2021-05-03 14:55:46,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:46,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:46,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:46,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313427279] [2021-05-03 14:55:46,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:46,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:46,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252218444] [2021-05-03 14:55:46,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:46,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:46,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:46,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:46,661 INFO L87 Difference]: Start difference. First operand 236 states and 714 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:46,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:46,822 INFO L93 Difference]: Finished difference Result 388 states and 1108 transitions. [2021-05-03 14:55:46,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:46,823 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:46,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:46,823 INFO L225 Difference]: With dead ends: 388 [2021-05-03 14:55:46,823 INFO L226 Difference]: Without dead ends: 382 [2021-05-03 14:55:46,823 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 107.5ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:46,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-05-03 14:55:46,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 248. [2021-05-03 14:55:46,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 3.0404858299595143) internal successors, (751), 247 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:46,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 751 transitions. [2021-05-03 14:55:46,826 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 751 transitions. Word has length 19 [2021-05-03 14:55:46,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:46,826 INFO L480 AbstractCegarLoop]: Abstraction has 248 states and 751 transitions. [2021-05-03 14:55:46,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:46,827 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 751 transitions. [2021-05-03 14:55:46,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:46,827 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:46,827 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:46,827 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable664 [2021-05-03 14:55:46,827 INFO L428 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:46,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:46,827 INFO L82 PathProgramCache]: Analyzing trace with hash -382828725, now seen corresponding path program 57 times [2021-05-03 14:55:46,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:46,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137947674] [2021-05-03 14:55:46,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:46,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:46,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:46,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137947674] [2021-05-03 14:55:46,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:46,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:46,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298309691] [2021-05-03 14:55:46,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:46,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:46,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:46,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:46,871 INFO L87 Difference]: Start difference. First operand 248 states and 751 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:47,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:47,027 INFO L93 Difference]: Finished difference Result 366 states and 1071 transitions. [2021-05-03 14:55:47,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:47,028 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:47,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:47,028 INFO L225 Difference]: With dead ends: 366 [2021-05-03 14:55:47,028 INFO L226 Difference]: Without dead ends: 366 [2021-05-03 14:55:47,028 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 99.1ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:47,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-05-03 14:55:47,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 235. [2021-05-03 14:55:47,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 3.0384615384615383) internal successors, (711), 234 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:47,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 711 transitions. [2021-05-03 14:55:47,031 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 711 transitions. Word has length 19 [2021-05-03 14:55:47,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:47,031 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 711 transitions. [2021-05-03 14:55:47,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:47,032 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 711 transitions. [2021-05-03 14:55:47,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:47,032 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:47,032 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:47,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable665 [2021-05-03 14:55:47,032 INFO L428 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:47,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:47,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1250504300, now seen corresponding path program 58 times [2021-05-03 14:55:47,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:47,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266876276] [2021-05-03 14:55:47,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:47,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:47,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:47,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266876276] [2021-05-03 14:55:47,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:47,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:47,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541809347] [2021-05-03 14:55:47,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:47,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:47,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:47,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:47,066 INFO L87 Difference]: Start difference. First operand 235 states and 711 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:47,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:47,159 INFO L93 Difference]: Finished difference Result 391 states and 1119 transitions. [2021-05-03 14:55:47,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:47,159 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:47,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:47,160 INFO L225 Difference]: With dead ends: 391 [2021-05-03 14:55:47,160 INFO L226 Difference]: Without dead ends: 379 [2021-05-03 14:55:47,160 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 54.2ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:55:47,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-05-03 14:55:47,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 237. [2021-05-03 14:55:47,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 3.0254237288135593) internal successors, (714), 236 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:47,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 714 transitions. [2021-05-03 14:55:47,163 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 714 transitions. Word has length 19 [2021-05-03 14:55:47,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:47,163 INFO L480 AbstractCegarLoop]: Abstraction has 237 states and 714 transitions. [2021-05-03 14:55:47,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:47,163 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 714 transitions. [2021-05-03 14:55:47,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:47,164 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:47,164 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:47,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable666 [2021-05-03 14:55:47,164 INFO L428 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:47,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:47,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1644682960, now seen corresponding path program 59 times [2021-05-03 14:55:47,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:47,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194291241] [2021-05-03 14:55:47,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:47,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:47,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:47,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194291241] [2021-05-03 14:55:47,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:47,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:47,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563938846] [2021-05-03 14:55:47,200 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:47,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:47,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:47,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:47,201 INFO L87 Difference]: Start difference. First operand 237 states and 714 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:47,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:47,294 INFO L93 Difference]: Finished difference Result 379 states and 1081 transitions. [2021-05-03 14:55:47,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:47,295 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:47,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:47,295 INFO L225 Difference]: With dead ends: 379 [2021-05-03 14:55:47,296 INFO L226 Difference]: Without dead ends: 373 [2021-05-03 14:55:47,296 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 67.3ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:55:47,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-05-03 14:55:47,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 247. [2021-05-03 14:55:47,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 3.0040650406504064) internal successors, (739), 246 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:47,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 739 transitions. [2021-05-03 14:55:47,299 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 739 transitions. Word has length 19 [2021-05-03 14:55:47,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:47,299 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 739 transitions. [2021-05-03 14:55:47,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:47,299 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 739 transitions. [2021-05-03 14:55:47,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:47,299 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:47,299 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:47,299 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable667 [2021-05-03 14:55:47,299 INFO L428 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:47,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:47,300 INFO L82 PathProgramCache]: Analyzing trace with hash 542768808, now seen corresponding path program 60 times [2021-05-03 14:55:47,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:47,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55839456] [2021-05-03 14:55:47,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:47,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:47,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:47,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55839456] [2021-05-03 14:55:47,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:47,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:47,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439438134] [2021-05-03 14:55:47,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:47,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:47,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:47,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:47,338 INFO L87 Difference]: Start difference. First operand 247 states and 739 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:47,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:47,416 INFO L93 Difference]: Finished difference Result 343 states and 998 transitions. [2021-05-03 14:55:47,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:47,416 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:47,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:47,417 INFO L225 Difference]: With dead ends: 343 [2021-05-03 14:55:47,417 INFO L226 Difference]: Without dead ends: 330 [2021-05-03 14:55:47,417 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 61.3ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:55:47,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-05-03 14:55:47,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 235. [2021-05-03 14:55:47,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 3.034188034188034) internal successors, (710), 234 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:47,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 710 transitions. [2021-05-03 14:55:47,420 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 710 transitions. Word has length 19 [2021-05-03 14:55:47,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:47,420 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 710 transitions. [2021-05-03 14:55:47,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:47,420 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 710 transitions. [2021-05-03 14:55:47,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:47,420 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:47,420 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:47,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable668 [2021-05-03 14:55:47,420 INFO L428 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:47,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:47,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1072803101, now seen corresponding path program 58 times [2021-05-03 14:55:47,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:47,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031382579] [2021-05-03 14:55:47,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:47,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:47,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:47,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031382579] [2021-05-03 14:55:47,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:47,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:47,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484903003] [2021-05-03 14:55:47,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:47,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:47,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:47,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:47,465 INFO L87 Difference]: Start difference. First operand 235 states and 710 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:47,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:47,594 INFO L93 Difference]: Finished difference Result 325 states and 939 transitions. [2021-05-03 14:55:47,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:47,594 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:47,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:47,595 INFO L225 Difference]: With dead ends: 325 [2021-05-03 14:55:47,595 INFO L226 Difference]: Without dead ends: 313 [2021-05-03 14:55:47,595 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 95.5ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:47,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-05-03 14:55:47,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 235. [2021-05-03 14:55:47,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 3.02991452991453) internal successors, (709), 234 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:47,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 709 transitions. [2021-05-03 14:55:47,598 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 709 transitions. Word has length 19 [2021-05-03 14:55:47,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:47,598 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 709 transitions. [2021-05-03 14:55:47,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:47,598 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 709 transitions. [2021-05-03 14:55:47,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:47,598 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:47,598 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:47,599 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable669 [2021-05-03 14:55:47,599 INFO L428 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:47,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:47,599 INFO L82 PathProgramCache]: Analyzing trace with hash -2138427743, now seen corresponding path program 59 times [2021-05-03 14:55:47,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:47,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495537918] [2021-05-03 14:55:47,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:47,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:47,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:47,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495537918] [2021-05-03 14:55:47,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:47,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:47,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279432526] [2021-05-03 14:55:47,637 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:47,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:47,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:47,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:47,637 INFO L87 Difference]: Start difference. First operand 235 states and 709 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:47,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:47,779 INFO L93 Difference]: Finished difference Result 329 states and 951 transitions. [2021-05-03 14:55:47,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:47,779 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:47,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:47,780 INFO L225 Difference]: With dead ends: 329 [2021-05-03 14:55:47,780 INFO L226 Difference]: Without dead ends: 323 [2021-05-03 14:55:47,780 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 97.2ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:47,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-05-03 14:55:47,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 241. [2021-05-03 14:55:47,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 3.0125) internal successors, (723), 240 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:47,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 723 transitions. [2021-05-03 14:55:47,783 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 723 transitions. Word has length 19 [2021-05-03 14:55:47,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:47,783 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 723 transitions. [2021-05-03 14:55:47,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:47,783 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 723 transitions. [2021-05-03 14:55:47,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:47,783 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:47,783 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:47,783 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable670 [2021-05-03 14:55:47,783 INFO L428 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:47,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:47,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1867918051, now seen corresponding path program 60 times [2021-05-03 14:55:47,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:47,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309908780] [2021-05-03 14:55:47,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:47,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:47,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:47,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309908780] [2021-05-03 14:55:47,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:47,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:47,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378476684] [2021-05-03 14:55:47,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:47,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:47,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:47,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:47,825 INFO L87 Difference]: Start difference. First operand 241 states and 723 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:47,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:47,965 INFO L93 Difference]: Finished difference Result 294 states and 876 transitions. [2021-05-03 14:55:47,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:47,965 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:47,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:47,966 INFO L225 Difference]: With dead ends: 294 [2021-05-03 14:55:47,966 INFO L226 Difference]: Without dead ends: 294 [2021-05-03 14:55:47,966 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 97.2ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:47,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-05-03 14:55:47,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 217. [2021-05-03 14:55:47,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 3.009259259259259) internal successors, (650), 216 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:47,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 650 transitions. [2021-05-03 14:55:47,968 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 650 transitions. Word has length 19 [2021-05-03 14:55:47,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:47,969 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 650 transitions. [2021-05-03 14:55:47,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:47,969 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 650 transitions. [2021-05-03 14:55:47,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:47,969 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:47,969 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:47,969 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable671 [2021-05-03 14:55:47,969 INFO L428 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:47,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:47,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1028896921, now seen corresponding path program 61 times [2021-05-03 14:55:47,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:47,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236151737] [2021-05-03 14:55:47,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:47,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:48,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:48,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236151737] [2021-05-03 14:55:48,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:48,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:48,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762503835] [2021-05-03 14:55:48,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:48,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:48,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:48,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:48,002 INFO L87 Difference]: Start difference. First operand 217 states and 650 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:48,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:48,087 INFO L93 Difference]: Finished difference Result 362 states and 1019 transitions. [2021-05-03 14:55:48,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:48,087 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:48,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:48,088 INFO L225 Difference]: With dead ends: 362 [2021-05-03 14:55:48,088 INFO L226 Difference]: Without dead ends: 346 [2021-05-03 14:55:48,088 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 62.8ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:48,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-05-03 14:55:48,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 219. [2021-05-03 14:55:48,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.9954128440366974) internal successors, (653), 218 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:48,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 653 transitions. [2021-05-03 14:55:48,091 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 653 transitions. Word has length 19 [2021-05-03 14:55:48,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:48,091 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 653 transitions. [2021-05-03 14:55:48,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:48,091 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 653 transitions. [2021-05-03 14:55:48,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:48,091 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:48,091 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:48,091 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable672 [2021-05-03 14:55:48,091 INFO L428 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:48,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:48,092 INFO L82 PathProgramCache]: Analyzing trace with hash 493077425, now seen corresponding path program 62 times [2021-05-03 14:55:48,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:48,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521583464] [2021-05-03 14:55:48,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:48,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:48,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:48,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521583464] [2021-05-03 14:55:48,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:48,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:48,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838372566] [2021-05-03 14:55:48,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:48,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:48,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:48,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:48,128 INFO L87 Difference]: Start difference. First operand 219 states and 653 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:48,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:48,244 INFO L93 Difference]: Finished difference Result 391 states and 1075 transitions. [2021-05-03 14:55:48,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:48,245 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:48,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:48,245 INFO L225 Difference]: With dead ends: 391 [2021-05-03 14:55:48,246 INFO L226 Difference]: Without dead ends: 383 [2021-05-03 14:55:48,246 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 84.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:48,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-05-03 14:55:48,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 231. [2021-05-03 14:55:48,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 2.9695652173913043) internal successors, (683), 230 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:48,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 683 transitions. [2021-05-03 14:55:48,249 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 683 transitions. Word has length 19 [2021-05-03 14:55:48,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:48,249 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 683 transitions. [2021-05-03 14:55:48,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:48,249 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 683 transitions. [2021-05-03 14:55:48,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:48,249 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:48,249 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:48,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable673 [2021-05-03 14:55:48,249 INFO L428 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:48,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:48,250 INFO L82 PathProgramCache]: Analyzing trace with hash 873815065, now seen corresponding path program 63 times [2021-05-03 14:55:48,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:48,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949389221] [2021-05-03 14:55:48,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:48,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:48,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:48,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949389221] [2021-05-03 14:55:48,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:48,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:48,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776035171] [2021-05-03 14:55:48,289 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:48,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:48,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:48,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:48,290 INFO L87 Difference]: Start difference. First operand 231 states and 683 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:48,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:48,396 INFO L93 Difference]: Finished difference Result 354 states and 997 transitions. [2021-05-03 14:55:48,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:48,397 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:48,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:48,398 INFO L225 Difference]: With dead ends: 354 [2021-05-03 14:55:48,398 INFO L226 Difference]: Without dead ends: 344 [2021-05-03 14:55:48,398 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 81.3ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:48,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-05-03 14:55:48,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 217. [2021-05-03 14:55:48,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 3.0) internal successors, (648), 216 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:48,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 648 transitions. [2021-05-03 14:55:48,403 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 648 transitions. Word has length 19 [2021-05-03 14:55:48,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:48,403 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 648 transitions. [2021-05-03 14:55:48,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:48,404 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 648 transitions. [2021-05-03 14:55:48,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:48,404 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:48,404 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:48,404 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable674 [2021-05-03 14:55:48,404 INFO L428 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:48,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:48,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1196865479, now seen corresponding path program 64 times [2021-05-03 14:55:48,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:48,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467577868] [2021-05-03 14:55:48,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:48,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:48,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:48,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467577868] [2021-05-03 14:55:48,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:48,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:48,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217073052] [2021-05-03 14:55:48,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:48,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:48,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:48,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:48,441 INFO L87 Difference]: Start difference. First operand 217 states and 648 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:48,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:48,558 INFO L93 Difference]: Finished difference Result 397 states and 1090 transitions. [2021-05-03 14:55:48,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:48,559 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:48,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:48,559 INFO L225 Difference]: With dead ends: 397 [2021-05-03 14:55:48,559 INFO L226 Difference]: Without dead ends: 389 [2021-05-03 14:55:48,559 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 80.1ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:48,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-05-03 14:55:48,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 233. [2021-05-03 14:55:48,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.9741379310344827) internal successors, (690), 232 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:48,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 690 transitions. [2021-05-03 14:55:48,563 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 690 transitions. Word has length 19 [2021-05-03 14:55:48,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:48,563 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 690 transitions. [2021-05-03 14:55:48,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:48,563 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 690 transitions. [2021-05-03 14:55:48,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:48,563 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:48,563 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:48,563 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable675 [2021-05-03 14:55:48,563 INFO L428 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:48,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:48,563 INFO L82 PathProgramCache]: Analyzing trace with hash -816127839, now seen corresponding path program 65 times [2021-05-03 14:55:48,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:48,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091012124] [2021-05-03 14:55:48,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:48,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:48,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:48,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091012124] [2021-05-03 14:55:48,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:48,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:48,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122460029] [2021-05-03 14:55:48,600 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:48,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:48,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:48,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:48,600 INFO L87 Difference]: Start difference. First operand 233 states and 690 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:48,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:48,714 INFO L93 Difference]: Finished difference Result 395 states and 1085 transitions. [2021-05-03 14:55:48,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:48,715 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:48,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:48,715 INFO L225 Difference]: With dead ends: 395 [2021-05-03 14:55:48,715 INFO L226 Difference]: Without dead ends: 387 [2021-05-03 14:55:48,716 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 85.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:48,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-05-03 14:55:48,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 231. [2021-05-03 14:55:48,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 2.9695652173913043) internal successors, (683), 230 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:48,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 683 transitions. [2021-05-03 14:55:48,719 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 683 transitions. Word has length 19 [2021-05-03 14:55:48,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:48,719 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 683 transitions. [2021-05-03 14:55:48,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:48,719 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 683 transitions. [2021-05-03 14:55:48,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:48,719 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:48,719 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:48,719 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable676 [2021-05-03 14:55:48,719 INFO L428 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:48,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:48,720 INFO L82 PathProgramCache]: Analyzing trace with hash -218791181, now seen corresponding path program 66 times [2021-05-03 14:55:48,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:48,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200548479] [2021-05-03 14:55:48,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:48,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:48,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:48,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200548479] [2021-05-03 14:55:48,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:48,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:48,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58098828] [2021-05-03 14:55:48,752 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:48,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:48,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:48,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:48,752 INFO L87 Difference]: Start difference. First operand 231 states and 683 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:48,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:48,838 INFO L93 Difference]: Finished difference Result 358 states and 1005 transitions. [2021-05-03 14:55:48,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:48,839 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:48,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:48,839 INFO L225 Difference]: With dead ends: 358 [2021-05-03 14:55:48,839 INFO L226 Difference]: Without dead ends: 342 [2021-05-03 14:55:48,839 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 63.3ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:48,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-05-03 14:55:48,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 215. [2021-05-03 14:55:48,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 3.0093457943925235) internal successors, (644), 214 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:48,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 644 transitions. [2021-05-03 14:55:48,842 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 644 transitions. Word has length 19 [2021-05-03 14:55:48,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:48,842 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 644 transitions. [2021-05-03 14:55:48,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:48,842 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 644 transitions. [2021-05-03 14:55:48,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:48,843 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:48,843 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:48,843 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable677 [2021-05-03 14:55:48,843 INFO L428 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:48,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:48,843 INFO L82 PathProgramCache]: Analyzing trace with hash 313632770, now seen corresponding path program 61 times [2021-05-03 14:55:48,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:48,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341410716] [2021-05-03 14:55:48,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:48,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:48,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:48,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341410716] [2021-05-03 14:55:48,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256103973] [2021-05-03 14:55:48,880 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:48,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:48,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:48,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:48,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:48,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:48,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-03 14:55:48,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036445226] [2021-05-03 14:55:48,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:55:48,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:48,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:55:48,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:55:48,953 INFO L87 Difference]: Start difference. First operand 215 states and 644 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:49,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:49,061 INFO L93 Difference]: Finished difference Result 390 states and 1140 transitions. [2021-05-03 14:55:49,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:49,062 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:49,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:49,065 INFO L225 Difference]: With dead ends: 390 [2021-05-03 14:55:49,065 INFO L226 Difference]: Without dead ends: 390 [2021-05-03 14:55:49,065 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 77.9ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:55:49,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-05-03 14:55:49,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 218. [2021-05-03 14:55:49,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 3.0092165898617513) internal successors, (653), 217 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:49,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 653 transitions. [2021-05-03 14:55:49,068 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 653 transitions. Word has length 19 [2021-05-03 14:55:49,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:49,068 INFO L480 AbstractCegarLoop]: Abstraction has 218 states and 653 transitions. [2021-05-03 14:55:49,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:49,068 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 653 transitions. [2021-05-03 14:55:49,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:49,069 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:49,069 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:49,269 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable678 [2021-05-03 14:55:49,269 INFO L428 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:49,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:49,269 INFO L82 PathProgramCache]: Analyzing trace with hash 157800938, now seen corresponding path program 62 times [2021-05-03 14:55:49,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:49,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069259230] [2021-05-03 14:55:49,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:49,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:49,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:49,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069259230] [2021-05-03 14:55:49,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420820590] [2021-05-03 14:55:49,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:49,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:55:49,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:49,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:49,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:49,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:49,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:49,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 14:55:49,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290085424] [2021-05-03 14:55:49,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:55:49,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:49,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:55:49,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:55:49,382 INFO L87 Difference]: Start difference. First operand 218 states and 653 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:49,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:49,484 INFO L93 Difference]: Finished difference Result 453 states and 1308 transitions. [2021-05-03 14:55:49,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:49,485 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:49,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:49,485 INFO L225 Difference]: With dead ends: 453 [2021-05-03 14:55:49,486 INFO L226 Difference]: Without dead ends: 453 [2021-05-03 14:55:49,486 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 81.6ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:55:49,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-05-03 14:55:49,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 221. [2021-05-03 14:55:49,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 3.022727272727273) internal successors, (665), 220 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:49,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 665 transitions. [2021-05-03 14:55:49,488 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 665 transitions. Word has length 19 [2021-05-03 14:55:49,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:49,488 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 665 transitions. [2021-05-03 14:55:49,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:49,488 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 665 transitions. [2021-05-03 14:55:49,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:49,489 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:49,489 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:49,689 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable679,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:49,689 INFO L428 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:49,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:49,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1087962114, now seen corresponding path program 63 times [2021-05-03 14:55:49,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:49,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283859109] [2021-05-03 14:55:49,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:49,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:49,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:49,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283859109] [2021-05-03 14:55:49,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12621231] [2021-05-03 14:55:49,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:49,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 14:55:49,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:49,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:49,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:49,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:49,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:49,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 14:55:49,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547758384] [2021-05-03 14:55:49,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:55:49,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:49,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:55:49,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:55:49,800 INFO L87 Difference]: Start difference. First operand 221 states and 665 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:49,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:49,908 INFO L93 Difference]: Finished difference Result 399 states and 1161 transitions. [2021-05-03 14:55:49,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:49,909 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:49,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:49,909 INFO L225 Difference]: With dead ends: 399 [2021-05-03 14:55:49,909 INFO L226 Difference]: Without dead ends: 393 [2021-05-03 14:55:49,909 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 79.5ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:55:49,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-05-03 14:55:49,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 215. [2021-05-03 14:55:49,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 3.0093457943925235) internal successors, (644), 214 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:49,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 644 transitions. [2021-05-03 14:55:49,912 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 644 transitions. Word has length 19 [2021-05-03 14:55:49,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:49,912 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 644 transitions. [2021-05-03 14:55:49,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:49,912 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 644 transitions. [2021-05-03 14:55:49,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:49,912 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:49,912 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:50,112 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable680,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:50,113 INFO L428 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:50,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:50,113 INFO L82 PathProgramCache]: Analyzing trace with hash -727997342, now seen corresponding path program 64 times [2021-05-03 14:55:50,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:50,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013720772] [2021-05-03 14:55:50,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:50,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:50,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:50,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013720772] [2021-05-03 14:55:50,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721442199] [2021-05-03 14:55:50,149 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:50,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:55:50,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:50,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:50,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:50,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:50,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:50,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 14:55:50,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769184407] [2021-05-03 14:55:50,238 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:55:50,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:50,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:55:50,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:55:50,238 INFO L87 Difference]: Start difference. First operand 215 states and 644 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:50,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:50,371 INFO L93 Difference]: Finished difference Result 423 states and 1218 transitions. [2021-05-03 14:55:50,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:50,372 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:50,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:50,373 INFO L225 Difference]: With dead ends: 423 [2021-05-03 14:55:50,373 INFO L226 Difference]: Without dead ends: 423 [2021-05-03 14:55:50,373 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 99.4ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:55:50,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-05-03 14:55:50,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 221. [2021-05-03 14:55:50,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 3.036363636363636) internal successors, (668), 220 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:50,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 668 transitions. [2021-05-03 14:55:50,376 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 668 transitions. Word has length 19 [2021-05-03 14:55:50,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:50,376 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 668 transitions. [2021-05-03 14:55:50,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:50,376 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 668 transitions. [2021-05-03 14:55:50,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:50,376 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:50,377 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:50,577 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable683 [2021-05-03 14:55:50,577 INFO L428 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:50,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:50,577 INFO L82 PathProgramCache]: Analyzing trace with hash 202163834, now seen corresponding path program 65 times [2021-05-03 14:55:50,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:50,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583716961] [2021-05-03 14:55:50,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:50,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:50,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:50,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583716961] [2021-05-03 14:55:50,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616927438] [2021-05-03 14:55:50,612 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:50,633 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:55:50,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:50,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:50,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:50,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:50,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:50,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 14:55:50,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177896514] [2021-05-03 14:55:50,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:55:50,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:50,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:55:50,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:55:50,702 INFO L87 Difference]: Start difference. First operand 221 states and 668 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:50,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:50,821 INFO L93 Difference]: Finished difference Result 429 states and 1227 transitions. [2021-05-03 14:55:50,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:50,822 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:50,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:50,822 INFO L225 Difference]: With dead ends: 429 [2021-05-03 14:55:50,822 INFO L226 Difference]: Without dead ends: 423 [2021-05-03 14:55:50,822 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 97.0ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:55:50,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-05-03 14:55:50,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 218. [2021-05-03 14:55:50,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 3.0230414746543777) internal successors, (656), 217 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:50,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 656 transitions. [2021-05-03 14:55:50,826 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 656 transitions. Word has length 19 [2021-05-03 14:55:50,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:50,826 INFO L480 AbstractCegarLoop]: Abstraction has 218 states and 656 transitions. [2021-05-03 14:55:50,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:50,826 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 656 transitions. [2021-05-03 14:55:50,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:50,826 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:50,826 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:51,026 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable684 [2021-05-03 14:55:51,026 INFO L428 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:51,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:51,027 INFO L82 PathProgramCache]: Analyzing trace with hash -810528698, now seen corresponding path program 66 times [2021-05-03 14:55:51,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:51,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9832746] [2021-05-03 14:55:51,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:51,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:51,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:51,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9832746] [2021-05-03 14:55:51,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711802871] [2021-05-03 14:55:51,056 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:51,077 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 14:55:51,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:51,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:51,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:51,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:51,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:51,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 14:55:51,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946965256] [2021-05-03 14:55:51,143 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:55:51,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:51,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:55:51,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:55:51,144 INFO L87 Difference]: Start difference. First operand 218 states and 656 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:51,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:51,241 INFO L93 Difference]: Finished difference Result 378 states and 1095 transitions. [2021-05-03 14:55:51,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:51,241 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:51,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:51,242 INFO L225 Difference]: With dead ends: 378 [2021-05-03 14:55:51,242 INFO L226 Difference]: Without dead ends: 366 [2021-05-03 14:55:51,242 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 76.9ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:55:51,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-05-03 14:55:51,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 215. [2021-05-03 14:55:51,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 3.0093457943925235) internal successors, (644), 214 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:51,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 644 transitions. [2021-05-03 14:55:51,245 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 644 transitions. Word has length 19 [2021-05-03 14:55:51,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:51,245 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 644 transitions. [2021-05-03 14:55:51,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:51,245 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 644 transitions. [2021-05-03 14:55:51,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:51,245 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:51,246 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:51,446 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable687 [2021-05-03 14:55:51,446 INFO L428 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:51,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:51,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1177425635, now seen corresponding path program 67 times [2021-05-03 14:55:51,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:51,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806146608] [2021-05-03 14:55:51,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:51,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:51,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:51,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806146608] [2021-05-03 14:55:51,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:51,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:51,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726192903] [2021-05-03 14:55:51,480 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:51,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:51,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:51,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:51,481 INFO L87 Difference]: Start difference. First operand 215 states and 644 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:51,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:51,564 INFO L93 Difference]: Finished difference Result 416 states and 1156 transitions. [2021-05-03 14:55:51,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:51,565 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:51,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:51,565 INFO L225 Difference]: With dead ends: 416 [2021-05-03 14:55:51,565 INFO L226 Difference]: Without dead ends: 400 [2021-05-03 14:55:51,565 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 51.3ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:55:51,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-05-03 14:55:51,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 219. [2021-05-03 14:55:51,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.9908256880733943) internal successors, (652), 218 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:51,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 652 transitions. [2021-05-03 14:55:51,568 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 652 transitions. Word has length 19 [2021-05-03 14:55:51,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:51,568 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 652 transitions. [2021-05-03 14:55:51,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:51,568 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 652 transitions. [2021-05-03 14:55:51,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:51,569 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:51,569 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:51,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable690 [2021-05-03 14:55:51,569 INFO L428 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:51,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:51,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1713245131, now seen corresponding path program 68 times [2021-05-03 14:55:51,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:51,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525436292] [2021-05-03 14:55:51,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:51,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:51,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:51,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525436292] [2021-05-03 14:55:51,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:51,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:51,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41019255] [2021-05-03 14:55:51,607 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:51,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:51,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:51,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:51,607 INFO L87 Difference]: Start difference. First operand 219 states and 652 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:51,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:51,707 INFO L93 Difference]: Finished difference Result 445 states and 1210 transitions. [2021-05-03 14:55:51,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:51,708 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:51,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:51,709 INFO L225 Difference]: With dead ends: 445 [2021-05-03 14:55:51,709 INFO L226 Difference]: Without dead ends: 437 [2021-05-03 14:55:51,709 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 66.3ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:55:51,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-05-03 14:55:51,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 235. [2021-05-03 14:55:51,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.9743589743589745) internal successors, (696), 234 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:51,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 696 transitions. [2021-05-03 14:55:51,712 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 696 transitions. Word has length 19 [2021-05-03 14:55:51,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:51,712 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 696 transitions. [2021-05-03 14:55:51,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:51,712 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 696 transitions. [2021-05-03 14:55:51,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:51,712 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:51,712 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:51,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable691 [2021-05-03 14:55:51,712 INFO L428 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:51,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:51,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1332507491, now seen corresponding path program 69 times [2021-05-03 14:55:51,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:51,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545462286] [2021-05-03 14:55:51,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:51,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:51,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:51,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545462286] [2021-05-03 14:55:51,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:51,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:51,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644052902] [2021-05-03 14:55:51,748 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:51,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:51,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:51,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:51,748 INFO L87 Difference]: Start difference. First operand 235 states and 696 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:51,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:51,854 INFO L93 Difference]: Finished difference Result 408 states and 1124 transitions. [2021-05-03 14:55:51,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:51,855 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:51,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:51,855 INFO L225 Difference]: With dead ends: 408 [2021-05-03 14:55:51,855 INFO L226 Difference]: Without dead ends: 398 [2021-05-03 14:55:51,855 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 61.7ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:55:51,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-05-03 14:55:51,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 225. [2021-05-03 14:55:51,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.982142857142857) internal successors, (668), 224 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:51,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 668 transitions. [2021-05-03 14:55:51,859 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 668 transitions. Word has length 19 [2021-05-03 14:55:51,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:51,859 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 668 transitions. [2021-05-03 14:55:51,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:51,859 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 668 transitions. [2021-05-03 14:55:51,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:51,859 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:51,859 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:51,859 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable692 [2021-05-03 14:55:51,859 INFO L428 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:51,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:51,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1162202982, now seen corresponding path program 67 times [2021-05-03 14:55:51,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:51,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744583899] [2021-05-03 14:55:51,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:51,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:51,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:51,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744583899] [2021-05-03 14:55:51,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010798199] [2021-05-03 14:55:51,903 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:51,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:51,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:51,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:51,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:51,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:51,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-03 14:55:51,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955761122] [2021-05-03 14:55:51,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:55:51,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:51,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:55:51,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:55:51,975 INFO L87 Difference]: Start difference. First operand 225 states and 668 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:52,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:52,096 INFO L93 Difference]: Finished difference Result 510 states and 1495 transitions. [2021-05-03 14:55:52,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:52,097 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:52,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:52,097 INFO L225 Difference]: With dead ends: 510 [2021-05-03 14:55:52,097 INFO L226 Difference]: Without dead ends: 510 [2021-05-03 14:55:52,098 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 79.1ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:52,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-05-03 14:55:52,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 225. [2021-05-03 14:55:52,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.982142857142857) internal successors, (668), 224 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:52,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 668 transitions. [2021-05-03 14:55:52,101 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 668 transitions. Word has length 19 [2021-05-03 14:55:52,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:52,101 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 668 transitions. [2021-05-03 14:55:52,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:52,101 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 668 transitions. [2021-05-03 14:55:52,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:52,101 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:52,101 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:52,302 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable693,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:52,302 INFO L428 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:52,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:52,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1006371150, now seen corresponding path program 68 times [2021-05-03 14:55:52,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:52,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728698244] [2021-05-03 14:55:52,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:52,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:52,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:52,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728698244] [2021-05-03 14:55:52,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711247081] [2021-05-03 14:55:52,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:52,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:55:52,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:52,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:52,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:52,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:52,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:52,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 14:55:52,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494963739] [2021-05-03 14:55:52,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:55:52,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:52,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:55:52,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:55:52,424 INFO L87 Difference]: Start difference. First operand 225 states and 668 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:52,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:52,536 INFO L93 Difference]: Finished difference Result 528 states and 1528 transitions. [2021-05-03 14:55:52,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:52,537 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:52,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:52,538 INFO L225 Difference]: With dead ends: 528 [2021-05-03 14:55:52,538 INFO L226 Difference]: Without dead ends: 528 [2021-05-03 14:55:52,538 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 79.6ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:55:52,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-05-03 14:55:52,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 231. [2021-05-03 14:55:52,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 3.0217391304347827) internal successors, (695), 230 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:52,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 695 transitions. [2021-05-03 14:55:52,542 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 695 transitions. Word has length 19 [2021-05-03 14:55:52,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:52,542 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 695 transitions. [2021-05-03 14:55:52,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:52,542 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 695 transitions. [2021-05-03 14:55:52,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:52,542 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:52,542 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:52,742 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable694,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:52,743 INFO L428 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:52,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:52,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1936532326, now seen corresponding path program 69 times [2021-05-03 14:55:52,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:52,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974530532] [2021-05-03 14:55:52,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:52,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:52,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:52,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974530532] [2021-05-03 14:55:52,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175698747] [2021-05-03 14:55:52,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:52,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 14:55:52,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:52,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:52,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:52,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:52,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:52,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 14:55:52,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397689790] [2021-05-03 14:55:52,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:55:52,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:52,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:55:52,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:55:52,857 INFO L87 Difference]: Start difference. First operand 231 states and 695 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:52,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:52,965 INFO L93 Difference]: Finished difference Result 474 states and 1375 transitions. [2021-05-03 14:55:52,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:52,966 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:52,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:52,966 INFO L225 Difference]: With dead ends: 474 [2021-05-03 14:55:52,967 INFO L226 Difference]: Without dead ends: 468 [2021-05-03 14:55:52,967 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 76.5ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:55:52,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-05-03 14:55:52,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 227. [2021-05-03 14:55:52,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 3.0132743362831858) internal successors, (681), 226 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:52,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 681 transitions. [2021-05-03 14:55:52,970 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 681 transitions. Word has length 19 [2021-05-03 14:55:52,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:52,970 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 681 transitions. [2021-05-03 14:55:52,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:52,971 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 681 transitions. [2021-05-03 14:55:52,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:52,971 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:52,971 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:53,171 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable695 [2021-05-03 14:55:53,171 INFO L428 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:53,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:53,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1084350617, now seen corresponding path program 70 times [2021-05-03 14:55:53,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:53,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324848780] [2021-05-03 14:55:53,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:53,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:53,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:53,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324848780] [2021-05-03 14:55:53,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334288184] [2021-05-03 14:55:53,206 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:53,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:55:53,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:53,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:53,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:53,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:53,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:53,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 14:55:53,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227463915] [2021-05-03 14:55:53,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:55:53,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:53,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:55:53,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:55:53,316 INFO L87 Difference]: Start difference. First operand 227 states and 681 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:53,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:53,426 INFO L93 Difference]: Finished difference Result 367 states and 1041 transitions. [2021-05-03 14:55:53,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:53,427 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:53,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:53,427 INFO L225 Difference]: With dead ends: 367 [2021-05-03 14:55:53,428 INFO L226 Difference]: Without dead ends: 351 [2021-05-03 14:55:53,428 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 90.4ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:55:53,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-05-03 14:55:53,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 221. [2021-05-03 14:55:53,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 3.0) internal successors, (660), 220 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:53,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 660 transitions. [2021-05-03 14:55:53,431 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 660 transitions. Word has length 19 [2021-05-03 14:55:53,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:53,431 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 660 transitions. [2021-05-03 14:55:53,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:53,431 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 660 transitions. [2021-05-03 14:55:53,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:53,431 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:53,431 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:53,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable698,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:53,645 INFO L428 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:53,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:53,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1215342274, now seen corresponding path program 70 times [2021-05-03 14:55:53,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:53,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173111370] [2021-05-03 14:55:53,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:53,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:53,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:53,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173111370] [2021-05-03 14:55:53,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218212248] [2021-05-03 14:55:53,679 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:55:53,719 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:55:53,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:53,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:53,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:53,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:53,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:53,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-03 14:55:53,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102210291] [2021-05-03 14:55:53,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:55:53,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:53,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:55:53,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:55:53,769 INFO L87 Difference]: Start difference. First operand 221 states and 660 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:53,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:53,869 INFO L93 Difference]: Finished difference Result 404 states and 1187 transitions. [2021-05-03 14:55:53,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:53,870 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:53,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:53,870 INFO L225 Difference]: With dead ends: 404 [2021-05-03 14:55:53,871 INFO L226 Difference]: Without dead ends: 404 [2021-05-03 14:55:53,871 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 67.2ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:53,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-05-03 14:55:53,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 200. [2021-05-03 14:55:53,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.9849246231155777) internal successors, (594), 199 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:53,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 594 transitions. [2021-05-03 14:55:53,873 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 594 transitions. Word has length 19 [2021-05-03 14:55:53,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:53,874 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 594 transitions. [2021-05-03 14:55:53,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:53,874 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 594 transitions. [2021-05-03 14:55:53,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:53,874 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:53,874 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:54,074 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable701 [2021-05-03 14:55:54,075 INFO L428 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:54,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:54,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1597715687, now seen corresponding path program 71 times [2021-05-03 14:55:54,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:54,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444594620] [2021-05-03 14:55:54,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:54,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:54,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:54,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444594620] [2021-05-03 14:55:54,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729180435] [2021-05-03 14:55:54,113 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:54,135 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:55:54,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:54,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:54,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:54,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:54,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:54,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:55:54,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930429117] [2021-05-03 14:55:54,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:55:54,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:54,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:55:54,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:54,212 INFO L87 Difference]: Start difference. First operand 200 states and 594 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:54,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:54,331 INFO L93 Difference]: Finished difference Result 356 states and 1020 transitions. [2021-05-03 14:55:54,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:54,332 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:54,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:54,333 INFO L225 Difference]: With dead ends: 356 [2021-05-03 14:55:54,333 INFO L226 Difference]: Without dead ends: 348 [2021-05-03 14:55:54,333 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 100.0ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:55:54,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-05-03 14:55:54,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 216. [2021-05-03 14:55:54,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 3.0232558139534884) internal successors, (650), 215 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:54,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 650 transitions. [2021-05-03 14:55:54,335 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 650 transitions. Word has length 19 [2021-05-03 14:55:54,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:54,336 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 650 transitions. [2021-05-03 14:55:54,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:54,336 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 650 transitions. [2021-05-03 14:55:54,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:54,336 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:54,336 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:54,536 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable702,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:54,536 INFO L428 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:54,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:54,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1565768734, now seen corresponding path program 71 times [2021-05-03 14:55:54,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:54,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925759953] [2021-05-03 14:55:54,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:54,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:54,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:54,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925759953] [2021-05-03 14:55:54,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533727316] [2021-05-03 14:55:54,573 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:54,613 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:55:54,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:54,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:54,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:54,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:54,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:54,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 14:55:54,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464887051] [2021-05-03 14:55:54,676 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:55:54,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:54,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:55:54,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:55:54,677 INFO L87 Difference]: Start difference. First operand 216 states and 650 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:54,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:54,795 INFO L93 Difference]: Finished difference Result 393 states and 1145 transitions. [2021-05-03 14:55:54,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:54,796 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:54,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:54,796 INFO L225 Difference]: With dead ends: 393 [2021-05-03 14:55:54,796 INFO L226 Difference]: Without dead ends: 393 [2021-05-03 14:55:54,797 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 86.2ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:55:54,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-05-03 14:55:54,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 216. [2021-05-03 14:55:54,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 3.0232558139534884) internal successors, (650), 215 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:54,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 650 transitions. [2021-05-03 14:55:54,799 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 650 transitions. Word has length 19 [2021-05-03 14:55:54,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:54,800 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 650 transitions. [2021-05-03 14:55:54,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:54,800 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 650 transitions. [2021-05-03 14:55:54,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:54,800 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:54,800 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:55,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable705 [2021-05-03 14:55:55,001 INFO L428 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:55,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:55,001 INFO L82 PathProgramCache]: Analyzing trace with hash 857230482, now seen corresponding path program 72 times [2021-05-03 14:55:55,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:55,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715539612] [2021-05-03 14:55:55,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:55,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:55,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:55,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715539612] [2021-05-03 14:55:55,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342827786] [2021-05-03 14:55:55,042 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:55,064 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 14:55:55,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:55,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:55,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:55,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:55,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:55,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 14:55:55,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500009325] [2021-05-03 14:55:55,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:55:55,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:55,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:55:55,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:55:55,142 INFO L87 Difference]: Start difference. First operand 216 states and 650 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:55,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:55,239 INFO L93 Difference]: Finished difference Result 339 states and 995 transitions. [2021-05-03 14:55:55,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:55,240 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:55,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:55,241 INFO L225 Difference]: With dead ends: 339 [2021-05-03 14:55:55,241 INFO L226 Difference]: Without dead ends: 330 [2021-05-03 14:55:55,241 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 78.6ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:55:55,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-05-03 14:55:55,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 216. [2021-05-03 14:55:55,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 3.0046511627906978) internal successors, (646), 215 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:55,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 646 transitions. [2021-05-03 14:55:55,245 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 646 transitions. Word has length 19 [2021-05-03 14:55:55,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:55,245 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 646 transitions. [2021-05-03 14:55:55,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:55,246 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 646 transitions. [2021-05-03 14:55:55,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:55,246 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:55,246 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:55,446 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable706,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:55,446 INFO L428 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:55,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:55,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1118431011, now seen corresponding path program 72 times [2021-05-03 14:55:55,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:55,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810642895] [2021-05-03 14:55:55,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:55,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:55,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:55,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810642895] [2021-05-03 14:55:55,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124238905] [2021-05-03 14:55:55,487 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:55,508 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 14:55:55,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:55,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:55,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:55,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:55,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:55,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:55:55,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559092647] [2021-05-03 14:55:55,583 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:55:55,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:55,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:55:55,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:55,584 INFO L87 Difference]: Start difference. First operand 216 states and 646 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:55,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:55,725 INFO L93 Difference]: Finished difference Result 310 states and 907 transitions. [2021-05-03 14:55:55,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:55,725 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:55,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:55,726 INFO L225 Difference]: With dead ends: 310 [2021-05-03 14:55:55,726 INFO L226 Difference]: Without dead ends: 310 [2021-05-03 14:55:55,726 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 106.3ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:55:55,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-05-03 14:55:55,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 196. [2021-05-03 14:55:55,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.9846153846153847) internal successors, (582), 195 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:55,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 582 transitions. [2021-05-03 14:55:55,728 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 582 transitions. Word has length 19 [2021-05-03 14:55:55,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:55,729 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 582 transitions. [2021-05-03 14:55:55,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:55,729 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 582 transitions. [2021-05-03 14:55:55,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:55,729 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:55,729 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:55,929 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable709,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:55,929 INFO L428 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:55,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:55,930 INFO L82 PathProgramCache]: Analyzing trace with hash -720751567, now seen corresponding path program 73 times [2021-05-03 14:55:55,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:55,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259248005] [2021-05-03 14:55:55,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:55,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:55,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:55,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259248005] [2021-05-03 14:55:55,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:55,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:55,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116908124] [2021-05-03 14:55:55,969 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:55,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:55,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:55,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:55,969 INFO L87 Difference]: Start difference. First operand 196 states and 582 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:56,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:56,086 INFO L93 Difference]: Finished difference Result 415 states and 1176 transitions. [2021-05-03 14:55:56,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:56,087 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:56,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:56,088 INFO L225 Difference]: With dead ends: 415 [2021-05-03 14:55:56,088 INFO L226 Difference]: Without dead ends: 407 [2021-05-03 14:55:56,088 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 61.4ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:55:56,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-05-03 14:55:56,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 216. [2021-05-03 14:55:56,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 3.013953488372093) internal successors, (648), 215 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:56,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 648 transitions. [2021-05-03 14:55:56,091 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 648 transitions. Word has length 19 [2021-05-03 14:55:56,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:56,091 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 648 transitions. [2021-05-03 14:55:56,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:56,091 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 648 transitions. [2021-05-03 14:55:56,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:56,091 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:56,091 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:56,091 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable710 [2021-05-03 14:55:56,091 INFO L428 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:56,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:56,091 INFO L82 PathProgramCache]: Analyzing trace with hash -340013927, now seen corresponding path program 74 times [2021-05-03 14:55:56,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:56,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138759114] [2021-05-03 14:55:56,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:56,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:56,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:56,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138759114] [2021-05-03 14:55:56,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:56,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:56,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281396016] [2021-05-03 14:55:56,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:56,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:56,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:56,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:56,129 INFO L87 Difference]: Start difference. First operand 216 states and 648 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:56,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:56,243 INFO L93 Difference]: Finished difference Result 421 states and 1191 transitions. [2021-05-03 14:55:56,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:56,244 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:56,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:56,245 INFO L225 Difference]: With dead ends: 421 [2021-05-03 14:55:56,245 INFO L226 Difference]: Without dead ends: 413 [2021-05-03 14:55:56,245 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 65.6ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:55:56,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-05-03 14:55:56,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 220. [2021-05-03 14:55:56,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 3.0) internal successors, (657), 219 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:56,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 657 transitions. [2021-05-03 14:55:56,248 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 657 transitions. Word has length 19 [2021-05-03 14:55:56,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:56,248 INFO L480 AbstractCegarLoop]: Abstraction has 220 states and 657 transitions. [2021-05-03 14:55:56,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:56,248 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 657 transitions. [2021-05-03 14:55:56,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:56,248 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:56,248 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:56,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable711 [2021-05-03 14:55:56,248 INFO L428 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:56,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:56,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1211611362, now seen corresponding path program 73 times [2021-05-03 14:55:56,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:56,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430343186] [2021-05-03 14:55:56,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:56,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:56,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:56,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430343186] [2021-05-03 14:55:56,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858808132] [2021-05-03 14:55:56,290 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:56,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:56,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:56,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:56,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:56,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:56,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 14:55:56,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179214875] [2021-05-03 14:55:56,384 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:55:56,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:56,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:55:56,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:55:56,385 INFO L87 Difference]: Start difference. First operand 220 states and 657 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:56,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:56,513 INFO L93 Difference]: Finished difference Result 479 states and 1393 transitions. [2021-05-03 14:55:56,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:56,514 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:56,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:56,514 INFO L225 Difference]: With dead ends: 479 [2021-05-03 14:55:56,514 INFO L226 Difference]: Without dead ends: 479 [2021-05-03 14:55:56,514 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 91.7ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:55:56,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-05-03 14:55:56,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 226. [2021-05-03 14:55:56,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 3.04) internal successors, (684), 225 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:56,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 684 transitions. [2021-05-03 14:55:56,518 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 684 transitions. Word has length 19 [2021-05-03 14:55:56,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:56,518 INFO L480 AbstractCegarLoop]: Abstraction has 226 states and 684 transitions. [2021-05-03 14:55:56,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:56,518 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 684 transitions. [2021-05-03 14:55:56,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:56,518 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:56,518 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:56,718 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable712 [2021-05-03 14:55:56,719 INFO L428 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:56,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:56,719 INFO L82 PathProgramCache]: Analyzing trace with hash 2141772538, now seen corresponding path program 74 times [2021-05-03 14:55:56,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:56,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176439569] [2021-05-03 14:55:56,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:56,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:56,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:56,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176439569] [2021-05-03 14:55:56,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247623880] [2021-05-03 14:55:56,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:56,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:55:56,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:56,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:56,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:56,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:56,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:56,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 14:55:56,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913131048] [2021-05-03 14:55:56,838 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:55:56,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:56,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:55:56,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:55:56,838 INFO L87 Difference]: Start difference. First operand 226 states and 684 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:56,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:56,988 INFO L93 Difference]: Finished difference Result 461 states and 1324 transitions. [2021-05-03 14:55:56,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:56,988 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:56,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:56,989 INFO L225 Difference]: With dead ends: 461 [2021-05-03 14:55:56,989 INFO L226 Difference]: Without dead ends: 455 [2021-05-03 14:55:56,989 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 76.3ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:55:56,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-05-03 14:55:56,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 225. [2021-05-03 14:55:56,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 3.03125) internal successors, (679), 224 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:56,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 679 transitions. [2021-05-03 14:55:56,993 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 679 transitions. Word has length 19 [2021-05-03 14:55:56,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:56,993 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 679 transitions. [2021-05-03 14:55:56,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:56,993 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 679 transitions. [2021-05-03 14:55:56,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:56,993 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:56,993 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:57,194 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable713,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:57,194 INFO L428 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:57,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:57,194 INFO L82 PathProgramCache]: Analyzing trace with hash -924885707, now seen corresponding path program 75 times [2021-05-03 14:55:57,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:57,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594621417] [2021-05-03 14:55:57,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:57,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:57,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:57,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594621417] [2021-05-03 14:55:57,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759218473] [2021-05-03 14:55:57,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:57,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 14:55:57,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:57,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:57,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:57,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:57,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:57,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:55:57,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765414746] [2021-05-03 14:55:57,332 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:55:57,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:57,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:55:57,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:57,332 INFO L87 Difference]: Start difference. First operand 225 states and 679 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:57,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:57,461 INFO L93 Difference]: Finished difference Result 439 states and 1238 transitions. [2021-05-03 14:55:57,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:57,462 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:57,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:57,462 INFO L225 Difference]: With dead ends: 439 [2021-05-03 14:55:57,462 INFO L226 Difference]: Without dead ends: 431 [2021-05-03 14:55:57,462 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 94.8ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:55:57,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-05-03 14:55:57,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 225. [2021-05-03 14:55:57,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 3.044642857142857) internal successors, (682), 224 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:57,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 682 transitions. [2021-05-03 14:55:57,467 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 682 transitions. Word has length 19 [2021-05-03 14:55:57,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:57,467 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 682 transitions. [2021-05-03 14:55:57,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:57,467 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 682 transitions. [2021-05-03 14:55:57,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:57,467 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:57,467 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:57,680 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable716 [2021-05-03 14:55:57,681 INFO L428 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:57,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:57,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1412011018, now seen corresponding path program 75 times [2021-05-03 14:55:57,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:57,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106169286] [2021-05-03 14:55:57,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:57,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:57,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:57,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106169286] [2021-05-03 14:55:57,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292296963] [2021-05-03 14:55:57,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:57,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:55:57,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:57,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:57,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:57,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:57,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:57,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 14:55:57,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278959521] [2021-05-03 14:55:57,801 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:55:57,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:57,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:55:57,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:55:57,801 INFO L87 Difference]: Start difference. First operand 225 states and 682 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:57,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:57,921 INFO L93 Difference]: Finished difference Result 458 states and 1317 transitions. [2021-05-03 14:55:57,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:57,922 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:57,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:57,923 INFO L225 Difference]: With dead ends: 458 [2021-05-03 14:55:57,923 INFO L226 Difference]: Without dead ends: 458 [2021-05-03 14:55:57,923 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 75.7ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:55:57,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-05-03 14:55:57,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 216. [2021-05-03 14:55:57,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 3.0325581395348835) internal successors, (652), 215 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:57,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 652 transitions. [2021-05-03 14:55:57,926 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 652 transitions. Word has length 19 [2021-05-03 14:55:57,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:57,926 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 652 transitions. [2021-05-03 14:55:57,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:57,927 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 652 transitions. [2021-05-03 14:55:57,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:57,927 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:57,927 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:58,127 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable719,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:58,127 INFO L428 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:58,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:58,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1330770346, now seen corresponding path program 76 times [2021-05-03 14:55:58,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:58,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343821200] [2021-05-03 14:55:58,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:58,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:58,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:58,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343821200] [2021-05-03 14:55:58,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517178400] [2021-05-03 14:55:58,163 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:58,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:55:58,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:58,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:58,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:58,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:58,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:58,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 14:55:58,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084623796] [2021-05-03 14:55:58,254 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:55:58,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:58,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:55:58,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:55:58,254 INFO L87 Difference]: Start difference. First operand 216 states and 652 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:58,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:58,390 INFO L93 Difference]: Finished difference Result 413 states and 1189 transitions. [2021-05-03 14:55:58,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:58,391 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:58,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:58,392 INFO L225 Difference]: With dead ends: 413 [2021-05-03 14:55:58,392 INFO L226 Difference]: Without dead ends: 404 [2021-05-03 14:55:58,392 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 80.8ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:55:58,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-05-03 14:55:58,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 216. [2021-05-03 14:55:58,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 3.013953488372093) internal successors, (648), 215 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:58,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 648 transitions. [2021-05-03 14:55:58,395 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 648 transitions. Word has length 19 [2021-05-03 14:55:58,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:58,395 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 648 transitions. [2021-05-03 14:55:58,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:58,395 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 648 transitions. [2021-05-03 14:55:58,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:58,395 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:58,395 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:58,596 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable720,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:58,596 INFO L428 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:58,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:58,596 INFO L82 PathProgramCache]: Analyzing trace with hash -644891147, now seen corresponding path program 76 times [2021-05-03 14:55:58,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:58,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895500088] [2021-05-03 14:55:58,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:58,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:58,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:58,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895500088] [2021-05-03 14:55:58,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715071581] [2021-05-03 14:55:58,638 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:55:58,666 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:55:58,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:55:58,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:55:58,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:55:58,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:58,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:55:58,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:55:58,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832261456] [2021-05-03 14:55:58,748 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:55:58,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:58,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:55:58,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:55:58,748 INFO L87 Difference]: Start difference. First operand 216 states and 648 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:58,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:58,896 INFO L93 Difference]: Finished difference Result 411 states and 1188 transitions. [2021-05-03 14:55:58,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:58,897 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:55:58,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:58,897 INFO L225 Difference]: With dead ends: 411 [2021-05-03 14:55:58,897 INFO L226 Difference]: Without dead ends: 411 [2021-05-03 14:55:58,898 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 104.1ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:55:58,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-05-03 14:55:58,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 212. [2021-05-03 14:55:58,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 3.014218009478673) internal successors, (636), 211 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:58,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 636 transitions. [2021-05-03 14:55:58,900 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 636 transitions. Word has length 19 [2021-05-03 14:55:58,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:58,900 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 636 transitions. [2021-05-03 14:55:58,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:58,900 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 636 transitions. [2021-05-03 14:55:58,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:58,901 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:58,901 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:59,101 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable723 [2021-05-03 14:55:59,101 INFO L428 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:59,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:59,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1954614186, now seen corresponding path program 77 times [2021-05-03 14:55:59,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:59,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850948842] [2021-05-03 14:55:59,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:59,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:59,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:59,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850948842] [2021-05-03 14:55:59,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:59,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:59,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195630336] [2021-05-03 14:55:59,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:59,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:59,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:59,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:59,134 INFO L87 Difference]: Start difference. First operand 212 states and 636 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:59,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:59,246 INFO L93 Difference]: Finished difference Result 384 states and 1100 transitions. [2021-05-03 14:55:59,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:59,246 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:59,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:59,247 INFO L225 Difference]: With dead ends: 384 [2021-05-03 14:55:59,247 INFO L226 Difference]: Without dead ends: 378 [2021-05-03 14:55:59,247 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 61.3ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:55:59,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-05-03 14:55:59,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 222. [2021-05-03 14:55:59,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.990950226244344) internal successors, (661), 221 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:59,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 661 transitions. [2021-05-03 14:55:59,250 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 661 transitions. Word has length 19 [2021-05-03 14:55:59,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:59,250 INFO L480 AbstractCegarLoop]: Abstraction has 222 states and 661 transitions. [2021-05-03 14:55:59,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:59,250 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 661 transitions. [2021-05-03 14:55:59,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:59,250 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:59,250 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:59,251 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable724 [2021-05-03 14:55:59,251 INFO L428 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:59,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:59,251 INFO L82 PathProgramCache]: Analyzing trace with hash 852700034, now seen corresponding path program 78 times [2021-05-03 14:55:59,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:59,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831623773] [2021-05-03 14:55:59,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:59,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:59,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:59,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831623773] [2021-05-03 14:55:59,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:59,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:59,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758563576] [2021-05-03 14:55:59,286 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:59,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:59,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:59,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:59,287 INFO L87 Difference]: Start difference. First operand 222 states and 661 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:59,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:59,387 INFO L93 Difference]: Finished difference Result 348 states and 1017 transitions. [2021-05-03 14:55:59,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:59,388 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:59,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:59,388 INFO L225 Difference]: With dead ends: 348 [2021-05-03 14:55:59,389 INFO L226 Difference]: Without dead ends: 337 [2021-05-03 14:55:59,389 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 62.0ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:55:59,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-05-03 14:55:59,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 212. [2021-05-03 14:55:59,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 3.009478672985782) internal successors, (635), 211 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:59,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 635 transitions. [2021-05-03 14:55:59,391 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 635 transitions. Word has length 19 [2021-05-03 14:55:59,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:59,391 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 635 transitions. [2021-05-03 14:55:59,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:59,392 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 635 transitions. [2021-05-03 14:55:59,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:59,392 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:59,392 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:59,392 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable725 [2021-05-03 14:55:59,392 INFO L428 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:59,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:59,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1616340899, now seen corresponding path program 77 times [2021-05-03 14:55:59,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:59,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079479772] [2021-05-03 14:55:59,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:59,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:59,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:59,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079479772] [2021-05-03 14:55:59,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:59,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:59,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904070521] [2021-05-03 14:55:59,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:59,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:59,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:59,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:59,431 INFO L87 Difference]: Start difference. First operand 212 states and 635 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:59,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:59,526 INFO L93 Difference]: Finished difference Result 362 states and 1032 transitions. [2021-05-03 14:55:59,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:59,527 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:59,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:59,527 INFO L225 Difference]: With dead ends: 362 [2021-05-03 14:55:59,527 INFO L226 Difference]: Without dead ends: 356 [2021-05-03 14:55:59,528 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 55.7ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:55:59,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-05-03 14:55:59,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 218. [2021-05-03 14:55:59,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.9907834101382487) internal successors, (649), 217 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:59,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 649 transitions. [2021-05-03 14:55:59,530 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 649 transitions. Word has length 19 [2021-05-03 14:55:59,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:59,530 INFO L480 AbstractCegarLoop]: Abstraction has 218 states and 649 transitions. [2021-05-03 14:55:59,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:59,530 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 649 transitions. [2021-05-03 14:55:59,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:59,530 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:59,530 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:59,530 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable726 [2021-05-03 14:55:59,530 INFO L428 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:59,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:59,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1345831207, now seen corresponding path program 78 times [2021-05-03 14:55:59,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:59,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293339816] [2021-05-03 14:55:59,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:59,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:59,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:59,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293339816] [2021-05-03 14:55:59,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:59,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:59,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689654048] [2021-05-03 14:55:59,566 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:59,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:59,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:59,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:59,566 INFO L87 Difference]: Start difference. First operand 218 states and 649 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:59,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:59,659 INFO L93 Difference]: Finished difference Result 340 states and 995 transitions. [2021-05-03 14:55:59,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:59,660 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:59,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:59,660 INFO L225 Difference]: With dead ends: 340 [2021-05-03 14:55:59,660 INFO L226 Difference]: Without dead ends: 340 [2021-05-03 14:55:59,660 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 52.6ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:55:59,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-05-03 14:55:59,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 195. [2021-05-03 14:55:59,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.984536082474227) internal successors, (579), 194 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:59,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 579 transitions. [2021-05-03 14:55:59,662 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 579 transitions. Word has length 19 [2021-05-03 14:55:59,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:59,663 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 579 transitions. [2021-05-03 14:55:59,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:59,663 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 579 transitions. [2021-05-03 14:55:59,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:59,663 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:59,663 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:59,663 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable727 [2021-05-03 14:55:59,663 INFO L428 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:59,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:59,663 INFO L82 PathProgramCache]: Analyzing trace with hash -494336067, now seen corresponding path program 79 times [2021-05-03 14:55:59,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:59,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100448838] [2021-05-03 14:55:59,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:59,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:59,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:59,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100448838] [2021-05-03 14:55:59,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:59,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:59,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374965286] [2021-05-03 14:55:59,694 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:59,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:59,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:59,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:59,694 INFO L87 Difference]: Start difference. First operand 195 states and 579 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:59,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:59,790 INFO L93 Difference]: Finished difference Result 335 states and 937 transitions. [2021-05-03 14:55:59,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:59,791 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:59,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:59,792 INFO L225 Difference]: With dead ends: 335 [2021-05-03 14:55:59,792 INFO L226 Difference]: Without dead ends: 327 [2021-05-03 14:55:59,792 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 57.0ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:55:59,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-05-03 14:55:59,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 212. [2021-05-03 14:55:59,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.9668246445497632) internal successors, (626), 211 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:59,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 626 transitions. [2021-05-03 14:55:59,795 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 626 transitions. Word has length 19 [2021-05-03 14:55:59,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:59,795 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 626 transitions. [2021-05-03 14:55:59,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:59,795 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 626 transitions. [2021-05-03 14:55:59,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:59,795 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:59,795 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:59,795 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable728 [2021-05-03 14:55:59,795 INFO L428 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:59,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:59,795 INFO L82 PathProgramCache]: Analyzing trace with hash -113598427, now seen corresponding path program 80 times [2021-05-03 14:55:59,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:59,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692764382] [2021-05-03 14:55:59,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:59,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:59,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:59,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692764382] [2021-05-03 14:55:59,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:59,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:59,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897807404] [2021-05-03 14:55:59,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:59,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:59,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:59,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:59,831 INFO L87 Difference]: Start difference. First operand 212 states and 626 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:59,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:55:59,931 INFO L93 Difference]: Finished difference Result 333 states and 932 transitions. [2021-05-03 14:55:59,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:55:59,932 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:55:59,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:55:59,932 INFO L225 Difference]: With dead ends: 333 [2021-05-03 14:55:59,932 INFO L226 Difference]: Without dead ends: 325 [2021-05-03 14:55:59,932 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 65.4ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:55:59,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-05-03 14:55:59,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 210. [2021-05-03 14:55:59,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.9617224880382773) internal successors, (619), 209 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:59,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 619 transitions. [2021-05-03 14:55:59,935 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 619 transitions. Word has length 19 [2021-05-03 14:55:59,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:55:59,935 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 619 transitions. [2021-05-03 14:55:59,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:55:59,935 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 619 transitions. [2021-05-03 14:55:59,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:55:59,935 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:55:59,935 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:55:59,935 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable729 [2021-05-03 14:55:59,935 INFO L428 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:55:59,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:55:59,935 INFO L82 PathProgramCache]: Analyzing trace with hash 483738231, now seen corresponding path program 81 times [2021-05-03 14:55:59,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:55:59,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210893173] [2021-05-03 14:55:59,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:55:59,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:55:59,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:55:59,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210893173] [2021-05-03 14:55:59,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:55:59,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:55:59,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21614617] [2021-05-03 14:55:59,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:55:59,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:55:59,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:55:59,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:55:59,965 INFO L87 Difference]: Start difference. First operand 210 states and 619 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:00,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:56:00,063 INFO L93 Difference]: Finished difference Result 347 states and 973 transitions. [2021-05-03 14:56:00,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:56:00,064 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:56:00,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:56:00,064 INFO L225 Difference]: With dead ends: 347 [2021-05-03 14:56:00,064 INFO L226 Difference]: Without dead ends: 333 [2021-05-03 14:56:00,065 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 51.4ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:56:00,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-05-03 14:56:00,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 208. [2021-05-03 14:56:00,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.9613526570048307) internal successors, (613), 207 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:00,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 613 transitions. [2021-05-03 14:56:00,067 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 613 transitions. Word has length 19 [2021-05-03 14:56:00,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:56:00,067 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 613 transitions. [2021-05-03 14:56:00,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:00,067 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 613 transitions. [2021-05-03 14:56:00,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:56:00,068 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:56:00,068 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:56:00,068 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable730 [2021-05-03 14:56:00,068 INFO L428 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:56:00,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:56:00,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1339481934, now seen corresponding path program 79 times [2021-05-03 14:56:00,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:56:00,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452202130] [2021-05-03 14:56:00,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:56:00,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:56:00,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:56:00,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452202130] [2021-05-03 14:56:00,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397802286] [2021-05-03 14:56:00,109 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:56:00,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:56:00,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:56:00,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:56:00,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:56:00,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:56:00,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:56:00,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276985356] [2021-05-03 14:56:00,209 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:56:00,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:56:00,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:56:00,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:56:00,210 INFO L87 Difference]: Start difference. First operand 208 states and 613 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:00,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:56:00,346 INFO L93 Difference]: Finished difference Result 388 states and 1116 transitions. [2021-05-03 14:56:00,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:56:00,347 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 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 19 [2021-05-03 14:56:00,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:56:00,347 INFO L225 Difference]: With dead ends: 388 [2021-05-03 14:56:00,347 INFO L226 Difference]: Without dead ends: 388 [2021-05-03 14:56:00,347 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 106.5ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:56:00,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-05-03 14:56:00,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 214. [2021-05-03 14:56:00,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.9906103286384975) internal successors, (637), 213 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:00,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 637 transitions. [2021-05-03 14:56:00,350 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 637 transitions. Word has length 19 [2021-05-03 14:56:00,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:56:00,350 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 637 transitions. [2021-05-03 14:56:00,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:00,350 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 637 transitions. [2021-05-03 14:56:00,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:56:00,351 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:56:00,351 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:56:00,551 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable731,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:56:00,551 INFO L428 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:56:00,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:56:00,551 INFO L82 PathProgramCache]: Analyzing trace with hash -2025324186, now seen corresponding path program 80 times [2021-05-03 14:56:00,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:56:00,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583817823] [2021-05-03 14:56:00,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:56:00,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:56:00,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:56:00,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583817823] [2021-05-03 14:56:00,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515212221] [2021-05-03 14:56:00,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:56:00,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:56:00,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:56:00,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:56:00,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:56:00,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:56:00,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:56:00,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:56:00,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695071636] [2021-05-03 14:56:00,690 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:56:00,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:56:00,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:56:00,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:56:00,690 INFO L87 Difference]: Start difference. First operand 214 states and 637 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:00,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:56:00,808 INFO L93 Difference]: Finished difference Result 382 states and 1089 transitions. [2021-05-03 14:56:00,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:56:00,809 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:56:00,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:56:00,809 INFO L225 Difference]: With dead ends: 382 [2021-05-03 14:56:00,810 INFO L226 Difference]: Without dead ends: 376 [2021-05-03 14:56:00,810 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 103.5ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:56:00,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-05-03 14:56:00,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 211. [2021-05-03 14:56:00,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.9761904761904763) internal successors, (625), 210 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:00,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 625 transitions. [2021-05-03 14:56:00,812 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 625 transitions. Word has length 19 [2021-05-03 14:56:00,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:56:00,812 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 625 transitions. [2021-05-03 14:56:00,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:00,813 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 625 transitions. [2021-05-03 14:56:00,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:56:00,813 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:56:00,813 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:56:01,013 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable732 [2021-05-03 14:56:01,013 INFO L428 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:56:01,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:56:01,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1256950578, now seen corresponding path program 81 times [2021-05-03 14:56:01,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:56:01,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650356654] [2021-05-03 14:56:01,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:56:01,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:56:01,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:56:01,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650356654] [2021-05-03 14:56:01,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508800494] [2021-05-03 14:56:01,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:56:01,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 14:56:01,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:56:01,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:56:01,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:56:01,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:56:01,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:56:01,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 14:56:01,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466282043] [2021-05-03 14:56:01,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:56:01,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:56:01,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:56:01,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:56:01,130 INFO L87 Difference]: Start difference. First operand 211 states and 625 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:01,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:56:01,250 INFO L93 Difference]: Finished difference Result 370 states and 1047 transitions. [2021-05-03 14:56:01,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:56:01,251 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:56:01,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:56:01,252 INFO L225 Difference]: With dead ends: 370 [2021-05-03 14:56:01,252 INFO L226 Difference]: Without dead ends: 358 [2021-05-03 14:56:01,252 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 83.1ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:56:01,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-05-03 14:56:01,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 208. [2021-05-03 14:56:01,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.9613526570048307) internal successors, (613), 207 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:01,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 613 transitions. [2021-05-03 14:56:01,254 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 613 transitions. Word has length 19 [2021-05-03 14:56:01,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:56:01,255 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 613 transitions. [2021-05-03 14:56:01,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:01,255 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 613 transitions. [2021-05-03 14:56:01,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:56:01,255 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:56:01,255 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:56:01,455 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable735,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:56:01,455 INFO L428 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:56:01,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:56:01,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1258244423, now seen corresponding path program 82 times [2021-05-03 14:56:01,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:56:01,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777936285] [2021-05-03 14:56:01,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:56:01,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:56:01,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:56:01,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777936285] [2021-05-03 14:56:01,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:56:01,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:56:01,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278951665] [2021-05-03 14:56:01,496 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:56:01,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:56:01,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:56:01,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:56:01,496 INFO L87 Difference]: Start difference. First operand 208 states and 613 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:01,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:56:01,593 INFO L93 Difference]: Finished difference Result 371 states and 1007 transitions. [2021-05-03 14:56:01,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:56:01,594 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:56:01,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:56:01,595 INFO L225 Difference]: With dead ends: 371 [2021-05-03 14:56:01,595 INFO L226 Difference]: Without dead ends: 363 [2021-05-03 14:56:01,595 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 58.9ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:56:01,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-05-03 14:56:01,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 218. [2021-05-03 14:56:01,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.986175115207373) internal successors, (648), 217 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:01,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 648 transitions. [2021-05-03 14:56:01,597 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 648 transitions. Word has length 19 [2021-05-03 14:56:01,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:56:01,598 INFO L480 AbstractCegarLoop]: Abstraction has 218 states and 648 transitions. [2021-05-03 14:56:01,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:01,598 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 648 transitions. [2021-05-03 14:56:01,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:56:01,598 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:56:01,598 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:56:01,598 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable738 [2021-05-03 14:56:01,598 INFO L428 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:56:01,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:56:01,598 INFO L82 PathProgramCache]: Analyzing trace with hash -877506783, now seen corresponding path program 83 times [2021-05-03 14:56:01,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:56:01,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896196028] [2021-05-03 14:56:01,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:56:01,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:56:01,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:56:01,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896196028] [2021-05-03 14:56:01,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:56:01,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:56:01,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537235103] [2021-05-03 14:56:01,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:56:01,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:56:01,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:56:01,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:56:01,642 INFO L87 Difference]: Start difference. First operand 218 states and 648 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:01,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:56:01,748 INFO L93 Difference]: Finished difference Result 377 states and 1022 transitions. [2021-05-03 14:56:01,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:56:01,749 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:56:01,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:56:01,749 INFO L225 Difference]: With dead ends: 377 [2021-05-03 14:56:01,749 INFO L226 Difference]: Without dead ends: 369 [2021-05-03 14:56:01,749 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 62.3ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:56:01,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-05-03 14:56:01,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 220. [2021-05-03 14:56:01,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.9771689497716896) internal successors, (652), 219 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:01,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 652 transitions. [2021-05-03 14:56:01,752 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 652 transitions. Word has length 19 [2021-05-03 14:56:01,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:56:01,752 INFO L480 AbstractCegarLoop]: Abstraction has 220 states and 652 transitions. [2021-05-03 14:56:01,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:01,752 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 652 transitions. [2021-05-03 14:56:01,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:56:01,753 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:56:01,753 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:56:01,753 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable739 [2021-05-03 14:56:01,753 INFO L428 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:56:01,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:56:01,753 INFO L82 PathProgramCache]: Analyzing trace with hash 674118506, now seen corresponding path program 82 times [2021-05-03 14:56:01,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:56:01,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865737687] [2021-05-03 14:56:01,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:56:01,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:56:01,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:56:01,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865737687] [2021-05-03 14:56:01,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310957696] [2021-05-03 14:56:01,795 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:56:01,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:56:01,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:56:01,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:56:01,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:56:01,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:56:01,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:56:01,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:56:01,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774675392] [2021-05-03 14:56:01,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:56:01,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:56:01,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:56:01,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:56:01,897 INFO L87 Difference]: Start difference. First operand 220 states and 652 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:02,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:56:02,037 INFO L93 Difference]: Finished difference Result 433 states and 1227 transitions. [2021-05-03 14:56:02,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:56:02,038 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 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 19 [2021-05-03 14:56:02,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:56:02,039 INFO L225 Difference]: With dead ends: 433 [2021-05-03 14:56:02,039 INFO L226 Difference]: Without dead ends: 433 [2021-05-03 14:56:02,039 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 101.7ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:56:02,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-05-03 14:56:02,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 226. [2021-05-03 14:56:02,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 3.017777777777778) internal successors, (679), 225 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:02,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 679 transitions. [2021-05-03 14:56:02,042 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 679 transitions. Word has length 19 [2021-05-03 14:56:02,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:56:02,042 INFO L480 AbstractCegarLoop]: Abstraction has 226 states and 679 transitions. [2021-05-03 14:56:02,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:02,042 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 679 transitions. [2021-05-03 14:56:02,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:56:02,042 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:56:02,042 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:56:02,242 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable740 [2021-05-03 14:56:02,243 INFO L428 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:56:02,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:56:02,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1604279682, now seen corresponding path program 83 times [2021-05-03 14:56:02,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:56:02,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012707808] [2021-05-03 14:56:02,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:56:02,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:56:02,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:56:02,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012707808] [2021-05-03 14:56:02,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162192678] [2021-05-03 14:56:02,281 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:56:02,302 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:56:02,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:56:02,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:56:02,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:56:02,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:56:02,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:56:02,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:56:02,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551272237] [2021-05-03 14:56:02,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:56:02,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:56:02,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:56:02,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:56:02,382 INFO L87 Difference]: Start difference. First operand 226 states and 679 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:02,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:56:02,496 INFO L93 Difference]: Finished difference Result 415 states and 1158 transitions. [2021-05-03 14:56:02,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:56:02,496 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:56:02,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:56:02,497 INFO L225 Difference]: With dead ends: 415 [2021-05-03 14:56:02,497 INFO L226 Difference]: Without dead ends: 409 [2021-05-03 14:56:02,497 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 95.1ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:56:02,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-05-03 14:56:02,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 225. [2021-05-03 14:56:02,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 3.0089285714285716) internal successors, (674), 224 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:02,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 674 transitions. [2021-05-03 14:56:02,500 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 674 transitions. Word has length 19 [2021-05-03 14:56:02,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:56:02,500 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 674 transitions. [2021-05-03 14:56:02,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:02,500 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 674 transitions. [2021-05-03 14:56:02,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:56:02,500 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:56:02,500 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:56:02,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable741 [2021-05-03 14:56:02,701 INFO L428 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:56:02,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:56:02,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1462378563, now seen corresponding path program 84 times [2021-05-03 14:56:02,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:56:02,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373929736] [2021-05-03 14:56:02,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:56:02,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:56:02,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:56:02,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373929736] [2021-05-03 14:56:02,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898878431] [2021-05-03 14:56:02,749 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:56:02,802 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 14:56:02,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:56:02,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:56:02,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:56:02,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:56:02,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:56:02,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:56:02,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777518945] [2021-05-03 14:56:02,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:56:02,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:56:02,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:56:02,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:56:02,889 INFO L87 Difference]: Start difference. First operand 225 states and 674 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:03,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:56:03,013 INFO L93 Difference]: Finished difference Result 343 states and 948 transitions. [2021-05-03 14:56:03,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:56:03,013 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 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 19 [2021-05-03 14:56:03,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:56:03,014 INFO L225 Difference]: With dead ends: 343 [2021-05-03 14:56:03,014 INFO L226 Difference]: Without dead ends: 335 [2021-05-03 14:56:03,014 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 110.8ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:56:03,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-05-03 14:56:03,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 222. [2021-05-03 14:56:03,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 3.0) internal successors, (663), 221 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:03,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 663 transitions. [2021-05-03 14:56:03,017 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 663 transitions. Word has length 19 [2021-05-03 14:56:03,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:56:03,017 INFO L480 AbstractCegarLoop]: Abstraction has 222 states and 663 transitions. [2021-05-03 14:56:03,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:03,017 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 663 transitions. [2021-05-03 14:56:03,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:56:03,017 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:56:03,017 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:56:03,218 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable744,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:56:03,218 INFO L428 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:56:03,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:56:03,218 INFO L82 PathProgramCache]: Analyzing trace with hash 874518162, now seen corresponding path program 84 times [2021-05-03 14:56:03,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:56:03,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225649638] [2021-05-03 14:56:03,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:56:03,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:56:03,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:56:03,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225649638] [2021-05-03 14:56:03,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34463306] [2021-05-03 14:56:03,261 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:56:03,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:56:03,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:56:03,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:56:03,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:56:03,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:56:03,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:56:03,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:56:03,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992857773] [2021-05-03 14:56:03,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:56:03,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:56:03,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:56:03,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:56:03,369 INFO L87 Difference]: Start difference. First operand 222 states and 663 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:03,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:56:03,504 INFO L93 Difference]: Finished difference Result 360 states and 1019 transitions. [2021-05-03 14:56:03,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:56:03,505 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 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 19 [2021-05-03 14:56:03,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:56:03,506 INFO L225 Difference]: With dead ends: 360 [2021-05-03 14:56:03,506 INFO L226 Difference]: Without dead ends: 360 [2021-05-03 14:56:03,506 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 110.7ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:56:03,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-05-03 14:56:03,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 213. [2021-05-03 14:56:03,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.9858490566037736) internal successors, (633), 212 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:03,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 633 transitions. [2021-05-03 14:56:03,509 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 633 transitions. Word has length 19 [2021-05-03 14:56:03,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:56:03,509 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 633 transitions. [2021-05-03 14:56:03,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:03,509 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 633 transitions. [2021-05-03 14:56:03,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:56:03,509 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:56:03,509 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:56:03,709 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable747 [2021-05-03 14:56:03,710 INFO L428 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:56:03,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:56:03,710 INFO L82 PathProgramCache]: Analyzing trace with hash 793277490, now seen corresponding path program 85 times [2021-05-03 14:56:03,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:56:03,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865445909] [2021-05-03 14:56:03,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:56:03,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:56:03,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:56:03,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865445909] [2021-05-03 14:56:03,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790633154] [2021-05-03 14:56:03,750 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:56:03,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:56:03,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:56:03,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:56:03,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:56:03,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:56:03,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:56:03,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848914941] [2021-05-03 14:56:03,853 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:56:03,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:56:03,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:56:03,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:56:03,854 INFO L87 Difference]: Start difference. First operand 213 states and 633 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:03,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:56:03,973 INFO L93 Difference]: Finished difference Result 315 states and 891 transitions. [2021-05-03 14:56:03,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:56:03,973 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:56:03,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:56:03,974 INFO L225 Difference]: With dead ends: 315 [2021-05-03 14:56:03,974 INFO L226 Difference]: Without dead ends: 306 [2021-05-03 14:56:03,974 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 101.0ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:56:03,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-05-03 14:56:03,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 213. [2021-05-03 14:56:03,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.9669811320754715) internal successors, (629), 212 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:03,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 629 transitions. [2021-05-03 14:56:03,977 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 629 transitions. Word has length 19 [2021-05-03 14:56:03,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:56:03,977 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 629 transitions. [2021-05-03 14:56:03,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:03,977 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 629 transitions. [2021-05-03 14:56:03,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:56:03,977 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:56:03,977 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:56:04,177 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable748,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:56:04,178 INFO L428 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:56:04,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:56:04,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1182384003, now seen corresponding path program 85 times [2021-05-03 14:56:04,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:56:04,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435784960] [2021-05-03 14:56:04,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:56:04,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:56:04,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:56:04,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435784960] [2021-05-03 14:56:04,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409901888] [2021-05-03 14:56:04,222 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:56:04,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:56:04,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 14:56:04,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:56:04,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:56:04,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:56:04,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:56:04,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055082688] [2021-05-03 14:56:04,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:56:04,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:56:04,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:56:04,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:56:04,326 INFO L87 Difference]: Start difference. First operand 213 states and 629 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:04,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:56:04,453 INFO L93 Difference]: Finished difference Result 302 states and 860 transitions. [2021-05-03 14:56:04,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:56:04,454 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:56:04,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:56:04,454 INFO L225 Difference]: With dead ends: 302 [2021-05-03 14:56:04,454 INFO L226 Difference]: Without dead ends: 302 [2021-05-03 14:56:04,455 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 108.0ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:56:04,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-05-03 14:56:04,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 209. [2021-05-03 14:56:04,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.9663461538461537) internal successors, (617), 208 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:04,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 617 transitions. [2021-05-03 14:56:04,457 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 617 transitions. Word has length 19 [2021-05-03 14:56:04,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:56:04,457 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 617 transitions. [2021-05-03 14:56:04,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:04,457 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 617 transitions. [2021-05-03 14:56:04,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:56:04,458 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:56:04,458 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:56:04,658 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable751 [2021-05-03 14:56:04,658 INFO L428 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:56:04,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:56:04,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1417121330, now seen corresponding path program 86 times [2021-05-03 14:56:04,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:56:04,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300192311] [2021-05-03 14:56:04,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:56:04,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:56:04,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:56:04,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300192311] [2021-05-03 14:56:04,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:56:04,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:56:04,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072717287] [2021-05-03 14:56:04,690 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:56:04,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:56:04,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:56:04,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:56:04,690 INFO L87 Difference]: Start difference. First operand 209 states and 617 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:04,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:56:04,837 INFO L93 Difference]: Finished difference Result 353 states and 973 transitions. [2021-05-03 14:56:04,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:56:04,838 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:56:04,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:56:04,839 INFO L225 Difference]: With dead ends: 353 [2021-05-03 14:56:04,839 INFO L226 Difference]: Without dead ends: 347 [2021-05-03 14:56:04,839 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 91.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:56:04,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-05-03 14:56:04,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 219. [2021-05-03 14:56:04,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.944954128440367) internal successors, (642), 218 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:04,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 642 transitions. [2021-05-03 14:56:04,841 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 642 transitions. Word has length 19 [2021-05-03 14:56:04,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:56:04,842 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 642 transitions. [2021-05-03 14:56:04,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:04,842 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 642 transitions. [2021-05-03 14:56:04,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:56:04,842 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:56:04,842 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:56:04,842 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable752 [2021-05-03 14:56:04,842 INFO L428 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:56:04,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:56:04,842 INFO L82 PathProgramCache]: Analyzing trace with hash 315207178, now seen corresponding path program 87 times [2021-05-03 14:56:04,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:56:04,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106139123] [2021-05-03 14:56:04,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:56:04,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:56:04,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:56:04,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106139123] [2021-05-03 14:56:04,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:56:04,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:56:04,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856576828] [2021-05-03 14:56:04,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:56:04,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:56:04,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:56:04,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:56:04,883 INFO L87 Difference]: Start difference. First operand 219 states and 642 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:05,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:56:05,006 INFO L93 Difference]: Finished difference Result 317 states and 890 transitions. [2021-05-03 14:56:05,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:56:05,008 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:56:05,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:56:05,008 INFO L225 Difference]: With dead ends: 317 [2021-05-03 14:56:05,008 INFO L226 Difference]: Without dead ends: 306 [2021-05-03 14:56:05,008 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 93.8ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:56:05,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-05-03 14:56:05,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 209. [2021-05-03 14:56:05,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.9615384615384617) internal successors, (616), 208 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:05,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 616 transitions. [2021-05-03 14:56:05,011 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 616 transitions. Word has length 19 [2021-05-03 14:56:05,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:56:05,011 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 616 transitions. [2021-05-03 14:56:05,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:05,011 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 616 transitions. [2021-05-03 14:56:05,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:56:05,011 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:56:05,011 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:56:05,011 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable753 [2021-05-03 14:56:05,011 INFO L428 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:56:05,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:56:05,012 INFO L82 PathProgramCache]: Analyzing trace with hash 2141133541, now seen corresponding path program 86 times [2021-05-03 14:56:05,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:56:05,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676872007] [2021-05-03 14:56:05,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:56:05,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:56:05,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:56:05,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676872007] [2021-05-03 14:56:05,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:56:05,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:56:05,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85886974] [2021-05-03 14:56:05,052 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:56:05,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:56:05,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:56:05,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:56:05,052 INFO L87 Difference]: Start difference. First operand 209 states and 616 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:05,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:56:05,168 INFO L93 Difference]: Finished difference Result 353 states and 981 transitions. [2021-05-03 14:56:05,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:56:05,169 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:56:05,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:56:05,169 INFO L225 Difference]: With dead ends: 353 [2021-05-03 14:56:05,169 INFO L226 Difference]: Without dead ends: 347 [2021-05-03 14:56:05,169 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 62.3ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:56:05,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-05-03 14:56:05,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 221. [2021-05-03 14:56:05,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.9681818181818183) internal successors, (653), 220 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:05,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 653 transitions. [2021-05-03 14:56:05,172 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 653 transitions. Word has length 19 [2021-05-03 14:56:05,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:56:05,173 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 653 transitions. [2021-05-03 14:56:05,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:05,173 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 653 transitions. [2021-05-03 14:56:05,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:56:05,173 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:56:05,173 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:56:05,173 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable754 [2021-05-03 14:56:05,173 INFO L428 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:56:05,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:56:05,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1883324063, now seen corresponding path program 87 times [2021-05-03 14:56:05,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:56:05,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403961922] [2021-05-03 14:56:05,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:56:05,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:56:05,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:56:05,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403961922] [2021-05-03 14:56:05,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:56:05,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:56:05,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123523549] [2021-05-03 14:56:05,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:56:05,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:56:05,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:56:05,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:56:05,219 INFO L87 Difference]: Start difference. First operand 221 states and 653 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:05,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:56:05,350 INFO L93 Difference]: Finished difference Result 331 states and 944 transitions. [2021-05-03 14:56:05,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:56:05,351 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:56:05,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:56:05,351 INFO L225 Difference]: With dead ends: 331 [2021-05-03 14:56:05,351 INFO L226 Difference]: Without dead ends: 331 [2021-05-03 14:56:05,352 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 68.1ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:56:05,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-05-03 14:56:05,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 208. [2021-05-03 14:56:05,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.9613526570048307) internal successors, (613), 207 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:05,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 613 transitions. [2021-05-03 14:56:05,354 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 613 transitions. Word has length 19 [2021-05-03 14:56:05,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:56:05,354 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 613 transitions. [2021-05-03 14:56:05,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:05,354 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 613 transitions. [2021-05-03 14:56:05,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:56:05,355 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:56:05,355 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:56:05,355 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable755 [2021-05-03 14:56:05,355 INFO L428 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:56:05,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:56:05,355 INFO L82 PathProgramCache]: Analyzing trace with hash -249991038, now seen corresponding path program 88 times [2021-05-03 14:56:05,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:56:05,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833239929] [2021-05-03 14:56:05,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:56:05,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:56:05,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:56:05,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833239929] [2021-05-03 14:56:05,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:56:05,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:56:05,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716181165] [2021-05-03 14:56:05,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:56:05,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:56:05,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:56:05,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:56:05,389 INFO L87 Difference]: Start difference. First operand 208 states and 613 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:05,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:56:05,525 INFO L93 Difference]: Finished difference Result 292 states and 822 transitions. [2021-05-03 14:56:05,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:56:05,526 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:56:05,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:56:05,526 INFO L225 Difference]: With dead ends: 292 [2021-05-03 14:56:05,526 INFO L226 Difference]: Without dead ends: 280 [2021-05-03 14:56:05,527 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 89.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:56:05,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-05-03 14:56:05,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 210. [2021-05-03 14:56:05,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.9473684210526314) internal successors, (616), 209 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:05,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 616 transitions. [2021-05-03 14:56:05,529 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 616 transitions. Word has length 19 [2021-05-03 14:56:05,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:56:05,529 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 616 transitions. [2021-05-03 14:56:05,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:05,529 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 616 transitions. [2021-05-03 14:56:05,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:56:05,530 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:56:05,530 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:56:05,530 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable756 [2021-05-03 14:56:05,530 INFO L428 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:56:05,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:56:05,530 INFO L82 PathProgramCache]: Analyzing trace with hash 144187622, now seen corresponding path program 89 times [2021-05-03 14:56:05,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:56:05,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654349755] [2021-05-03 14:56:05,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:56:05,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:56:05,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:56:05,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654349755] [2021-05-03 14:56:05,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:56:05,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:56:05,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701122071] [2021-05-03 14:56:05,567 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:56:05,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:56:05,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:56:05,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:56:05,568 INFO L87 Difference]: Start difference. First operand 210 states and 616 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:05,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:56:05,717 INFO L93 Difference]: Finished difference Result 280 states and 784 transitions. [2021-05-03 14:56:05,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:56:05,718 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:56:05,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:56:05,718 INFO L225 Difference]: With dead ends: 280 [2021-05-03 14:56:05,718 INFO L226 Difference]: Without dead ends: 274 [2021-05-03 14:56:05,718 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 114.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:56:05,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-05-03 14:56:05,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 220. [2021-05-03 14:56:05,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.9269406392694064) internal successors, (641), 219 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:05,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 641 transitions. [2021-05-03 14:56:05,721 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 641 transitions. Word has length 19 [2021-05-03 14:56:05,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:56:05,721 INFO L480 AbstractCegarLoop]: Abstraction has 220 states and 641 transitions. [2021-05-03 14:56:05,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:05,721 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 641 transitions. [2021-05-03 14:56:05,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:56:05,721 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:56:05,721 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:56:05,721 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable757 [2021-05-03 14:56:05,722 INFO L428 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:56:05,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:56:05,722 INFO L82 PathProgramCache]: Analyzing trace with hash -957726530, now seen corresponding path program 90 times [2021-05-03 14:56:05,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:56:05,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942390321] [2021-05-03 14:56:05,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:56:05,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:56:05,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:56:05,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942390321] [2021-05-03 14:56:05,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:56:05,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:56:05,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450937744] [2021-05-03 14:56:05,758 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:56:05,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:56:05,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:56:05,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:56:05,758 INFO L87 Difference]: Start difference. First operand 220 states and 641 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:05,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:56:05,880 INFO L93 Difference]: Finished difference Result 244 states and 701 transitions. [2021-05-03 14:56:05,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:56:05,880 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:56:05,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:56:05,880 INFO L225 Difference]: With dead ends: 244 [2021-05-03 14:56:05,880 INFO L226 Difference]: Without dead ends: 231 [2021-05-03 14:56:05,881 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 103.8ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:56:05,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-05-03 14:56:05,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 208. [2021-05-03 14:56:05,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.9565217391304346) internal successors, (612), 207 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:05,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 612 transitions. [2021-05-03 14:56:05,883 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 612 transitions. Word has length 19 [2021-05-03 14:56:05,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:56:05,883 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 612 transitions. [2021-05-03 14:56:05,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:05,883 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 612 transitions. [2021-05-03 14:56:05,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:56:05,883 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:56:05,883 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:56:05,883 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable758 [2021-05-03 14:56:05,883 INFO L428 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:56:05,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:56:05,884 INFO L82 PathProgramCache]: Analyzing trace with hash -427692237, now seen corresponding path program 88 times [2021-05-03 14:56:05,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:56:05,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985930051] [2021-05-03 14:56:05,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:56:05,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:56:05,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:56:05,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985930051] [2021-05-03 14:56:05,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:56:05,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:56:05,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308995584] [2021-05-03 14:56:05,924 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:56:05,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:56:05,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:56:05,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:56:05,925 INFO L87 Difference]: Start difference. First operand 208 states and 612 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:06,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:56:06,007 INFO L93 Difference]: Finished difference Result 277 states and 780 transitions. [2021-05-03 14:56:06,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:56:06,008 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:56:06,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:56:06,009 INFO L225 Difference]: With dead ends: 277 [2021-05-03 14:56:06,009 INFO L226 Difference]: Without dead ends: 265 [2021-05-03 14:56:06,009 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 57.2ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:56:06,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-05-03 14:56:06,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 208. [2021-05-03 14:56:06,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.9516908212560384) internal successors, (611), 207 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:06,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 611 transitions. [2021-05-03 14:56:06,011 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 611 transitions. Word has length 19 [2021-05-03 14:56:06,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:56:06,011 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 611 transitions. [2021-05-03 14:56:06,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:06,011 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 611 transitions. [2021-05-03 14:56:06,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:56:06,012 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:56:06,012 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:56:06,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable759 [2021-05-03 14:56:06,012 INFO L428 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:56:06,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:56:06,012 INFO L82 PathProgramCache]: Analyzing trace with hash 656044215, now seen corresponding path program 89 times [2021-05-03 14:56:06,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:56:06,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316693308] [2021-05-03 14:56:06,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:56:06,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:56:06,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:56:06,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316693308] [2021-05-03 14:56:06,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:56:06,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:56:06,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492001483] [2021-05-03 14:56:06,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:56:06,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:56:06,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:56:06,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:56:06,064 INFO L87 Difference]: Start difference. First operand 208 states and 611 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:06,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:56:06,177 INFO L93 Difference]: Finished difference Result 281 states and 792 transitions. [2021-05-03 14:56:06,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:56:06,177 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:56:06,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:56:06,178 INFO L225 Difference]: With dead ends: 281 [2021-05-03 14:56:06,178 INFO L226 Difference]: Without dead ends: 275 [2021-05-03 14:56:06,178 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 76.7ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:56:06,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-05-03 14:56:06,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 214. [2021-05-03 14:56:06,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.9342723004694835) internal successors, (625), 213 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:06,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 625 transitions. [2021-05-03 14:56:06,180 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 625 transitions. Word has length 19 [2021-05-03 14:56:06,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:56:06,180 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 625 transitions. [2021-05-03 14:56:06,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:06,181 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 625 transitions. [2021-05-03 14:56:06,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:56:06,181 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:56:06,181 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:56:06,181 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable760 [2021-05-03 14:56:06,181 INFO L428 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:56:06,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:56:06,181 INFO L82 PathProgramCache]: Analyzing trace with hash 926553907, now seen corresponding path program 90 times [2021-05-03 14:56:06,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:56:06,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418204666] [2021-05-03 14:56:06,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:56:06,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:56:06,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:56:06,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418204666] [2021-05-03 14:56:06,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:56:06,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-03 14:56:06,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099844023] [2021-05-03 14:56:06,226 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 14:56:06,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:56:06,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 14:56:06,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:56:06,227 INFO L87 Difference]: Start difference. First operand 214 states and 625 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:06,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:56:06,331 INFO L93 Difference]: Finished difference Result 246 states and 717 transitions. [2021-05-03 14:56:06,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:56:06,332 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-05-03 14:56:06,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:56:06,333 INFO L225 Difference]: With dead ends: 246 [2021-05-03 14:56:06,333 INFO L226 Difference]: Without dead ends: 246 [2021-05-03 14:56:06,333 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 69.0ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:56:06,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-05-03 14:56:06,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 189. [2021-05-03 14:56:06,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9202127659574466) internal successors, (549), 188 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:06,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2021-05-03 14:56:06,335 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 19 [2021-05-03 14:56:06,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:56:06,335 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2021-05-03 14:56:06,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:06,335 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2021-05-03 14:56:06,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:56:06,335 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:56:06,336 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:56:06,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable761 [2021-05-03 14:56:06,336 INFO L428 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:56:06,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:56:06,336 INFO L82 PathProgramCache]: Analyzing trace with hash 440404552, now seen corresponding path program 1 times [2021-05-03 14:56:06,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:56:06,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009071171] [2021-05-03 14:56:06,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:56:06,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:56:06,835 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-05-03 14:56:07,018 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:56:07,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009071171] [2021-05-03 14:56:07,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722506631] [2021-05-03 14:56:07,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:56:07,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:56:07,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:56:07,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:56:07,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:56:07,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:56:07,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:08,020 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 92 [2021-05-03 14:56:08,021 INFO L628 ElimStorePlain]: treesize reduction 156, result has 66.2 percent of original size [2021-05-03 14:56:08,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:56:08,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:56:08,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:56:08,038 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:08,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:56:08,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:56:08,049 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:08,216 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-05-03 14:56:08,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:56:08,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:56:08,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:56:08,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:56:08,227 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:08,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:56:08,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:56:08,236 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:08,370 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-05-03 14:56:08,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:56:08,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:56:08,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:56:08,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 14:56:08,387 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:08,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:56:08,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:56:08,398 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:08,524 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-05-03 14:56:08,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:56:08,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:56:08,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:56:08,532 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:08,651 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-05-03 14:56:08,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:56:08,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:56:08,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:56:08,664 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:08,778 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-05-03 14:56:08,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:56:08,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-05-03 14:56:08,795 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:469, output treesize:196 [2021-05-03 14:56:08,987 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 84 [2021-05-03 14:56:09,213 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 65 [2021-05-03 14:56:09,783 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-05-03 14:56:09,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:56:09,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:56:09,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:56:09,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999633016] [2021-05-03 14:56:09,880 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:56:09,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:56:09,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:56:09,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:56:09,881 INFO L87 Difference]: Start difference. First operand 189 states and 549 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:10,049 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2021-05-03 14:56:10,377 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2021-05-03 14:56:10,934 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 110 [2021-05-03 14:56:11,139 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-05-03 14:56:11,691 WARN L205 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 116 [2021-05-03 14:56:11,958 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-05-03 14:56:12,641 WARN L205 SmtUtils]: Spent 608.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 123 [2021-05-03 14:56:12,970 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 78 [2021-05-03 14:56:13,678 WARN L205 SmtUtils]: Spent 649.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 130 [2021-05-03 14:56:14,021 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2021-05-03 14:56:14,918 WARN L205 SmtUtils]: Spent 843.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 137 [2021-05-03 14:56:15,337 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 75 [2021-05-03 14:56:15,949 WARN L205 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 125 [2021-05-03 14:56:15,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:56:15,953 INFO L93 Difference]: Finished difference Result 523 states and 1420 transitions. [2021-05-03 14:56:15,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:56:15,954 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 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 20 [2021-05-03 14:56:15,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:56:15,954 INFO L225 Difference]: With dead ends: 523 [2021-05-03 14:56:15,954 INFO L226 Difference]: Without dead ends: 493 [2021-05-03 14:56:15,955 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 6949.0ms TimeCoverageRelationStatistics Valid=227, Invalid=895, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 14:56:15,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-05-03 14:56:15,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 217. [2021-05-03 14:56:15,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.861111111111111) internal successors, (618), 216 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:15,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 618 transitions. [2021-05-03 14:56:15,958 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 618 transitions. Word has length 20 [2021-05-03 14:56:15,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:56:15,958 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 618 transitions. [2021-05-03 14:56:15,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:15,958 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 618 transitions. [2021-05-03 14:56:15,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:56:15,958 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:56:15,958 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:56:16,159 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable762 [2021-05-03 14:56:16,159 INFO L428 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:56:16,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:56:16,159 INFO L82 PathProgramCache]: Analyzing trace with hash 43486898, now seen corresponding path program 2 times [2021-05-03 14:56:16,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:56:16,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027938832] [2021-05-03 14:56:16,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:56:16,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:56:16,554 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:56:16,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027938832] [2021-05-03 14:56:16,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895198808] [2021-05-03 14:56:16,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:56:16,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:56:16,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:56:16,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 14:56:16,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:56:17,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:56:17,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:56:17,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:18,425 WARN L205 SmtUtils]: Spent 619.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 126 [2021-05-03 14:56:18,426 INFO L628 ElimStorePlain]: treesize reduction 228, result has 67.3 percent of original size [2021-05-03 14:56:18,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:56:18,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:56:18,437 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:18,691 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-05-03 14:56:18,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:56:18,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:56:18,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:56:18,714 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:18,934 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-05-03 14:56:18,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:56:18,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:56:18,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:56:18,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:56:18,949 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:18,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:56:18,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:56:18,959 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:19,183 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-05-03 14:56:19,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:56:19,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:56:19,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:56:19,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:56:19,194 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:19,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:56:19,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 14:56:19,204 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:19,438 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-05-03 14:56:19,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:56:19,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:56:19,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:56:19,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:56:19,450 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:19,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:56:19,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:56:19,461 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:19,685 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-05-03 14:56:19,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:56:19,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:56:19,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:56:19,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:56:19,696 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:19,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:56:19,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:56:19,706 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:19,913 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-05-03 14:56:19,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:56:19,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:56:19,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:56:19,924 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:20,133 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-05-03 14:56:20,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:56:20,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: 10 dim-0 vars, and 12 xjuncts. [2021-05-03 14:56:20,154 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 16 variables, input treesize:705, output treesize:339 [2021-05-03 14:56:20,600 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 124 [2021-05-03 14:56:20,969 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-05-03 14:56:21,452 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_61, v_prenex_43, v_prenex_65, v_prenex_53, get_6, v_prenex_63, v_prenex_41, v_prenex_47, v_prenex_45, v_prenex_55, v_prenex_49, v_prenex_59], 1=[get_3, v_prenex_60, v_prenex_54, v_prenex_42, v_prenex_64, v_prenex_52, v_prenex_62, v_prenex_40, v_prenex_58, v_prenex_46, v_prenex_44, v_prenex_48]} [2021-05-03 14:56:21,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:56:21,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:22,290 WARN L205 SmtUtils]: Spent 820.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 103 [2021-05-03 14:56:22,290 INFO L628 ElimStorePlain]: treesize reduction 1019, result has 27.2 percent of original size [2021-05-03 14:56:22,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 14:56:22,300 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:22,541 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-05-03 14:56:22,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:56:22,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 14:56:22,558 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:22,798 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-05-03 14:56:22,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:56:22,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 14:56:22,809 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:23,043 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-05-03 14:56:23,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:56:23,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:56:23,052 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:23,282 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-05-03 14:56:23,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:56:23,282 INFO L518 ElimStorePlain]: Eliminatee v_prenex_63 vanished before elimination [2021-05-03 14:56:23,282 INFO L518 ElimStorePlain]: Eliminatee v_prenex_41 vanished before elimination [2021-05-03 14:56:23,282 INFO L518 ElimStorePlain]: Eliminatee v_prenex_47 vanished before elimination [2021-05-03 14:56:23,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 14:56:23,294 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:23,516 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-05-03 14:56:23,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:56:23,518 INFO L518 ElimStorePlain]: Eliminatee v_prenex_55 vanished before elimination [2021-05-03 14:56:23,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 14:56:23,525 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:23,731 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-05-03 14:56:23,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:56:23,732 INFO L518 ElimStorePlain]: Eliminatee v_prenex_59 vanished before elimination [2021-05-03 14:56:23,732 INFO L518 ElimStorePlain]: Eliminatee get_3 vanished before elimination [2021-05-03 14:56:23,732 INFO L518 ElimStorePlain]: Eliminatee v_prenex_60 vanished before elimination [2021-05-03 14:56:23,732 INFO L518 ElimStorePlain]: Eliminatee v_prenex_54 vanished before elimination [2021-05-03 14:56:23,732 INFO L518 ElimStorePlain]: Eliminatee v_prenex_42 vanished before elimination [2021-05-03 14:56:23,732 INFO L518 ElimStorePlain]: Eliminatee v_prenex_64 vanished before elimination [2021-05-03 14:56:23,732 INFO L518 ElimStorePlain]: Eliminatee v_prenex_52 vanished before elimination [2021-05-03 14:56:23,732 INFO L518 ElimStorePlain]: Eliminatee v_prenex_62 vanished before elimination [2021-05-03 14:56:23,732 INFO L518 ElimStorePlain]: Eliminatee v_prenex_40 vanished before elimination [2021-05-03 14:56:23,732 INFO L518 ElimStorePlain]: Eliminatee v_prenex_58 vanished before elimination [2021-05-03 14:56:23,732 INFO L518 ElimStorePlain]: Eliminatee v_prenex_46 vanished before elimination [2021-05-03 14:56:23,732 INFO L518 ElimStorePlain]: Eliminatee v_prenex_44 vanished before elimination [2021-05-03 14:56:23,732 INFO L518 ElimStorePlain]: Eliminatee v_prenex_48 vanished before elimination [2021-05-03 14:56:23,736 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 24 dim-1 vars, End of recursive call: and 16 xjuncts. [2021-05-03 14:56:23,736 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 36 variables, input treesize:1407, output treesize:283 [2021-05-03 14:56:23,949 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-05-03 14:56:24,140 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 14:56:24,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:56:24,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:56:24,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:56:24,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706825390] [2021-05-03 14:56:24,300 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:56:24,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:56:24,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:56:24,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:56:24,301 INFO L87 Difference]: Start difference. First operand 217 states and 618 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:24,558 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 80 [2021-05-03 14:56:24,982 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 84 [2021-05-03 14:56:26,018 WARN L205 SmtUtils]: Spent 803.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 173 [2021-05-03 14:56:26,235 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-05-03 14:56:26,529 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 90 [2021-05-03 14:56:26,753 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-05-03 14:56:27,741 WARN L205 SmtUtils]: Spent 923.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 177 [2021-05-03 14:56:28,001 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2021-05-03 14:56:29,638 WARN L205 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 198 DAG size of output: 190 [2021-05-03 14:56:29,885 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-05-03 14:56:31,667 WARN L205 SmtUtils]: Spent 1.72 s on a formula simplification. DAG size of input: 212 DAG size of output: 198 [2021-05-03 14:56:32,003 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2021-05-03 14:56:34,043 WARN L205 SmtUtils]: Spent 1.95 s on a formula simplification. DAG size of input: 225 DAG size of output: 207 [2021-05-03 14:56:34,372 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 68 [2021-05-03 14:56:34,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:56:34,412 INFO L93 Difference]: Finished difference Result 617 states and 1637 transitions. [2021-05-03 14:56:34,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:56:34,413 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 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 20 [2021-05-03 14:56:34,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:56:34,414 INFO L225 Difference]: With dead ends: 617 [2021-05-03 14:56:34,414 INFO L226 Difference]: Without dead ends: 587 [2021-05-03 14:56:34,414 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 11093.7ms TimeCoverageRelationStatistics Valid=225, Invalid=965, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 14:56:34,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-05-03 14:56:34,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 223. [2021-05-03 14:56:34,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.8963963963963963) internal successors, (643), 222 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:34,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 643 transitions. [2021-05-03 14:56:34,418 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 643 transitions. Word has length 20 [2021-05-03 14:56:34,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:56:34,418 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 643 transitions. [2021-05-03 14:56:34,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:34,418 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 643 transitions. [2021-05-03 14:56:34,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:56:34,418 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:56:34,418 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:56:34,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable822 [2021-05-03 14:56:34,629 INFO L428 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:56:34,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:56:34,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1655233490, now seen corresponding path program 3 times [2021-05-03 14:56:34,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:56:34,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813762254] [2021-05-03 14:56:34,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:56:34,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:56:34,873 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-05-03 14:56:35,032 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-05-03 14:56:35,230 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-05-03 14:56:35,366 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 28 [2021-05-03 14:56:35,471 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:56:35,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813762254] [2021-05-03 14:56:35,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273906101] [2021-05-03 14:56:35,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:56:35,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 14:56:35,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:56:35,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:56:35,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:56:36,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:56:36,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:56:36,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-05-03 14:56:36,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:36,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:56:36,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:56:36,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 14:56:36,075 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:36,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:56:36,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 14:56:36,084 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:36,442 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 88 [2021-05-03 14:56:36,443 INFO L628 ElimStorePlain]: treesize reduction 98, result has 73.4 percent of original size [2021-05-03 14:56:36,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:56:36,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:56:36,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:56:36,453 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:36,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:56:36,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:56:36,463 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:36,611 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-05-03 14:56:36,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:56:36,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:56:36,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:56:36,622 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:36,804 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-05-03 14:56:36,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:56:36,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:56:36,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:56:36,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:56:36,815 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:36,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:56:36,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:56:36,824 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:36,968 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-05-03 14:56:36,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:56:36,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:56:36,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:56:36,980 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:37,126 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-05-03 14:56:37,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:56:37,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:56:37,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:56:37,135 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:37,265 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-05-03 14:56:37,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:56:37,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-05-03 14:56:37,279 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:469, output treesize:196 [2021-05-03 14:56:37,543 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 84 [2021-05-03 14:56:37,808 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-05-03 14:56:38,402 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-05-03 14:56:38,573 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2021-05-03 14:56:38,718 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:56:38,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:56:38,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:56:38,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622982294] [2021-05-03 14:56:38,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:56:38,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:56:38,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:56:38,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:56:38,718 INFO L87 Difference]: Start difference. First operand 223 states and 643 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:39,123 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 51 [2021-05-03 14:56:39,529 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 59 [2021-05-03 14:56:40,279 WARN L205 SmtUtils]: Spent 581.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 120 [2021-05-03 14:56:41,143 WARN L205 SmtUtils]: Spent 649.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 124 [2021-05-03 14:56:42,354 WARN L205 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 188 DAG size of output: 134 [2021-05-03 14:56:43,905 WARN L205 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 209 DAG size of output: 139 [2021-05-03 14:56:45,598 WARN L205 SmtUtils]: Spent 1.60 s on a formula simplification. DAG size of input: 225 DAG size of output: 146 [2021-05-03 14:56:45,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:56:45,645 INFO L93 Difference]: Finished difference Result 504 states and 1377 transitions. [2021-05-03 14:56:45,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:56:45,646 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 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 20 [2021-05-03 14:56:45,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:56:45,647 INFO L225 Difference]: With dead ends: 504 [2021-05-03 14:56:45,647 INFO L226 Difference]: Without dead ends: 489 [2021-05-03 14:56:45,647 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 8231.6ms TimeCoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:56:45,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-05-03 14:56:45,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 249. [2021-05-03 14:56:45,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.9274193548387095) internal successors, (726), 248 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:45,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 726 transitions. [2021-05-03 14:56:45,651 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 726 transitions. Word has length 20 [2021-05-03 14:56:45,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:56:45,651 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 726 transitions. [2021-05-03 14:56:45,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:45,651 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 726 transitions. [2021-05-03 14:56:45,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:56:45,651 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:56:45,651 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:56:45,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable956,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:56:45,852 INFO L428 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:56:45,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:56:45,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1828481182, now seen corresponding path program 4 times [2021-05-03 14:56:45,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:56:45,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867002723] [2021-05-03 14:56:45,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:56:45,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:56:46,221 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2021-05-03 14:56:46,520 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:56:46,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867002723] [2021-05-03 14:56:46,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176058151] [2021-05-03 14:56:46,521 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:56:46,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:56:46,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:56:46,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:56:46,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:56:47,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:56:47,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:56:47,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:56:47,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:47,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:56:47,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:56:47,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 14:56:47,150 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:47,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:56:47,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:56:47,160 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:47,584 WARN L205 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 92 [2021-05-03 14:56:47,584 INFO L628 ElimStorePlain]: treesize reduction 141, result has 68.0 percent of original size [2021-05-03 14:56:47,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:56:47,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:56:47,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 14:56:47,596 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:47,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:56:47,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:56:47,619 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:47,784 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-05-03 14:56:47,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:56:47,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:56:47,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:56:47,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:56:47,796 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:47,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:56:47,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:56:47,806 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:47,955 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-05-03 14:56:47,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:56:47,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:56:47,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:56:47,964 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:48,111 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-05-03 14:56:48,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:56:48,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:56:48,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:56:48,120 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:48,269 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-05-03 14:56:48,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:56:48,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:56:48,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:56:48,279 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:48,422 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-05-03 14:56:48,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:56:48,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-05-03 14:56:48,433 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:469, output treesize:196 [2021-05-03 14:56:48,708 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 84 [2021-05-03 14:56:48,977 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-05-03 14:56:49,338 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 69 [2021-05-03 14:56:49,765 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-05-03 14:56:49,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:56:49,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:56:49,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:56:49,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541774959] [2021-05-03 14:56:49,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:56:49,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:56:49,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:56:49,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:56:49,893 INFO L87 Difference]: Start difference. First operand 249 states and 726 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:50,314 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 61 [2021-05-03 14:56:50,729 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 68 [2021-05-03 14:56:51,764 WARN L205 SmtUtils]: Spent 857.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 131 [2021-05-03 14:56:52,616 WARN L205 SmtUtils]: Spent 667.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 136 [2021-05-03 14:56:54,338 WARN L205 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 215 DAG size of output: 144 [2021-05-03 14:56:55,835 WARN L205 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 195 DAG size of output: 152 [2021-05-03 14:56:57,508 WARN L205 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 209 DAG size of output: 161 [2021-05-03 14:56:57,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:56:57,564 INFO L93 Difference]: Finished difference Result 473 states and 1314 transitions. [2021-05-03 14:56:57,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:56:57,565 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 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 20 [2021-05-03 14:56:57,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:56:57,566 INFO L225 Difference]: With dead ends: 473 [2021-05-03 14:56:57,566 INFO L226 Difference]: Without dead ends: 458 [2021-05-03 14:56:57,566 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 8830.5ms TimeCoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:56:57,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-05-03 14:56:57,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 249. [2021-05-03 14:56:57,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.9274193548387095) internal successors, (726), 248 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:57,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 726 transitions. [2021-05-03 14:56:57,569 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 726 transitions. Word has length 20 [2021-05-03 14:56:57,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:56:57,569 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 726 transitions. [2021-05-03 14:56:57,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:56:57,570 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 726 transitions. [2021-05-03 14:56:57,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:56:57,570 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:56:57,570 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:56:57,770 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1026 [2021-05-03 14:56:57,770 INFO L428 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:56:57,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:56:57,771 INFO L82 PathProgramCache]: Analyzing trace with hash 123064008, now seen corresponding path program 5 times [2021-05-03 14:56:57,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:56:57,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347803249] [2021-05-03 14:56:57,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:56:57,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:56:58,112 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-05-03 14:56:58,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:56:58,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347803249] [2021-05-03 14:56:58,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811078047] [2021-05-03 14:56:58,330 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:56:58,359 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:56:58,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:56:58,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:56:58,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:56:58,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-05-03 14:56:58,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:58,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 14:56:58,807 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:58,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 14:56:58,816 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:58,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 14:56:58,825 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:58,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 14:56:58,833 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:58,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-05-03 14:56:58,842 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:58,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 14:56:58,850 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:58,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 14:56:58,859 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:58,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-05-03 14:56:58,867 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:58,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-05-03 14:56:58,876 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:58,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:56:58,885 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:58,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 14:56:58,894 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:58,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 14:56:58,902 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:58,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-05-03 14:56:58,910 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:58,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 14:56:58,919 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:58,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-05-03 14:56:58,929 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:58,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-05-03 14:56:58,938 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:58,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:56:58,947 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-05-03 14:56:59,204 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 14:56:59,205 INFO L628 ElimStorePlain]: treesize reduction 103, result has 63.5 percent of original size [2021-05-03 14:56:59,206 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-05-03 14:56:59,206 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 1 variables, input treesize:751, output treesize:179 [2021-05-03 14:56:59,463 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-05-03 14:56:59,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:56:59,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:56:59,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 14:56:59,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550020563] [2021-05-03 14:56:59,759 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 14:56:59,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:56:59,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 14:56:59,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:56:59,759 INFO L87 Difference]: Start difference. First operand 249 states and 726 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:57:00,145 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-05-03 14:57:00,450 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2021-05-03 14:57:00,836 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2021-05-03 14:57:01,392 WARN L205 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 73 [2021-05-03 14:57:02,251 WARN L205 SmtUtils]: Spent 759.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 78 [2021-05-03 14:57:02,690 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2021-05-03 14:57:03,252 WARN L205 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 73 [2021-05-03 14:57:03,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:57:03,299 INFO L93 Difference]: Finished difference Result 428 states and 1208 transitions. [2021-05-03 14:57:03,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:57:03,301 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 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 20 [2021-05-03 14:57:03,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:57:03,301 INFO L225 Difference]: With dead ends: 428 [2021-05-03 14:57:03,301 INFO L226 Difference]: Without dead ends: 413 [2021-05-03 14:57:03,301 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 4184.3ms TimeCoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:57:03,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-05-03 14:57:03,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 261. [2021-05-03 14:57:03,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 2.9153846153846152) internal successors, (758), 260 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:57:03,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 758 transitions. [2021-05-03 14:57:03,305 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 758 transitions. Word has length 20 [2021-05-03 14:57:03,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:57:03,305 INFO L480 AbstractCegarLoop]: Abstraction has 261 states and 758 transitions. [2021-05-03 14:57:03,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:57:03,305 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 758 transitions. [2021-05-03 14:57:03,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:57:03,305 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:57:03,305 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:57:03,506 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1086,207 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:57:03,506 INFO L428 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:57:03,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:57:03,506 INFO L82 PathProgramCache]: Analyzing trace with hash 602348684, now seen corresponding path program 6 times [2021-05-03 14:57:03,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:57:03,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935313341] [2021-05-03 14:57:03,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:57:03,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:57:03,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:57:03,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935313341] [2021-05-03 14:57:03,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017150673] [2021-05-03 14:57:03,892 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:57:03,916 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 14:57:03,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:57:03,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 14:57:03,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:57:04,301 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 59 [2021-05-03 14:57:05,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:05,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:05,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:57:05,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:05,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:05,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:05,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-05-03 14:57:05,789 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:05,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:05,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:05,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:57:05,804 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:05,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:05,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:05,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-05-03 14:57:05,818 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:05,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:05,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:05,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 14:57:05,833 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:05,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:05,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-05-03 14:57:05,847 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:06,926 WARN L205 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 109 DAG size of output: 94 [2021-05-03 14:57:06,927 INFO L628 ElimStorePlain]: treesize reduction 682, result has 46.3 percent of original size [2021-05-03 14:57:06,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:06,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:06,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 14:57:06,942 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:06,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:06,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:06,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:57:06,956 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:06,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:06,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:57:06,970 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:07,962 WARN L205 SmtUtils]: Spent 991.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 89 [2021-05-03 14:57:07,963 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.8 percent of original size [2021-05-03 14:57:07,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:07,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:07,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:57:07,975 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:07,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:07,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:07,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:57:07,990 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:07,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:07,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:57:08,001 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:08,455 WARN L205 SmtUtils]: Spent 453.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-05-03 14:57:08,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:57:08,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:08,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:08,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:57:08,469 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:08,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:08,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:08,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:57:08,479 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:08,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:08,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:57:08,490 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:09,345 WARN L205 SmtUtils]: Spent 854.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 80 [2021-05-03 14:57:09,346 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.8 percent of original size [2021-05-03 14:57:09,357 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 10 dim-0 vars, and 12 xjuncts. [2021-05-03 14:57:09,357 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:1393, output treesize:469 [2021-05-03 14:57:09,695 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2021-05-03 14:57:10,437 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_151, v_prenex_141, get_6, v_prenex_143, v_prenex_145, v_prenex_135, v_prenex_147, v_prenex_137, v_prenex_149, v_prenex_139], 1=[v_prenex_150, v_prenex_140, v_prenex_152, v_prenex_142, v_prenex_144, v_prenex_146, v_prenex_136, get_0, v_prenex_148, v_prenex_138]} [2021-05-03 14:57:10,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-05-03 14:57:10,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:10,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-05-03 14:57:10,479 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:10,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 14:57:10,498 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:10,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:57:10,519 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:10,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:57:10,538 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:10,555 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 14:57:10,556 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:12,199 WARN L205 SmtUtils]: Spent 1.64 s on a formula simplification. DAG size of input: 260 DAG size of output: 150 [2021-05-03 14:57:12,199 INFO L628 ElimStorePlain]: treesize reduction 2957, result has 15.5 percent of original size [2021-05-03 14:57:12,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 14:57:12,212 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:12,653 WARN L205 SmtUtils]: Spent 440.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2021-05-03 14:57:12,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:57:12,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-05-03 14:57:12,665 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:13,104 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2021-05-03 14:57:13,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:57:13,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 14:57:13,116 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:13,565 WARN L205 SmtUtils]: Spent 447.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-05-03 14:57:13,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:57:13,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 14:57:13,578 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:14,001 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:57:14,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:57:14,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:57:14,013 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:14,346 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-05-03 14:57:14,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:57:14,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 14:57:14,355 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:14,721 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-05-03 14:57:14,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:57:14,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:57:14,732 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:15,144 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-05-03 14:57:15,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:57:15,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:57:15,155 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:15,542 WARN L205 SmtUtils]: Spent 386.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-05-03 14:57:15,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:57:15,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-05-03 14:57:15,554 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:15,940 WARN L205 SmtUtils]: Spent 386.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-05-03 14:57:15,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:57:15,941 INFO L518 ElimStorePlain]: Eliminatee v_prenex_150 vanished before elimination [2021-05-03 14:57:15,941 INFO L518 ElimStorePlain]: Eliminatee v_prenex_140 vanished before elimination [2021-05-03 14:57:15,941 INFO L518 ElimStorePlain]: Eliminatee v_prenex_152 vanished before elimination [2021-05-03 14:57:15,941 INFO L518 ElimStorePlain]: Eliminatee v_prenex_142 vanished before elimination [2021-05-03 14:57:15,941 INFO L518 ElimStorePlain]: Eliminatee v_prenex_144 vanished before elimination [2021-05-03 14:57:15,941 INFO L518 ElimStorePlain]: Eliminatee v_prenex_146 vanished before elimination [2021-05-03 14:57:15,941 INFO L518 ElimStorePlain]: Eliminatee v_prenex_136 vanished before elimination [2021-05-03 14:57:15,941 INFO L518 ElimStorePlain]: Eliminatee get_0 vanished before elimination [2021-05-03 14:57:15,941 INFO L518 ElimStorePlain]: Eliminatee v_prenex_148 vanished before elimination [2021-05-03 14:57:15,941 INFO L518 ElimStorePlain]: Eliminatee v_prenex_138 vanished before elimination [2021-05-03 14:57:15,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 10 dim-0 vars, 20 dim-1 vars, End of recursive call: and 16 xjuncts. [2021-05-03 14:57:15,947 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 30 variables, input treesize:3619, output treesize:394 [2021-05-03 14:57:16,627 WARN L205 SmtUtils]: Spent 626.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-05-03 14:57:17,236 WARN L205 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-05-03 14:57:17,502 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2021-05-03 14:57:17,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:57:17,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:57:17,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:57:17,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026440623] [2021-05-03 14:57:17,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:57:17,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:57:17,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:57:17,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:57:17,526 INFO L87 Difference]: Start difference. First operand 261 states and 758 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:57:17,815 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2021-05-03 14:57:18,202 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 80 [2021-05-03 14:57:18,727 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 84 [2021-05-03 14:57:19,918 WARN L205 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 182 DAG size of output: 181 [2021-05-03 14:57:21,193 WARN L205 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 112 DAG size of output: 103 [2021-05-03 14:57:22,687 WARN L205 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 136 DAG size of output: 117 [2021-05-03 14:57:24,725 WARN L205 SmtUtils]: Spent 1.90 s on a formula simplification. DAG size of input: 152 DAG size of output: 129 [2021-05-03 14:57:24,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:57:24,777 INFO L93 Difference]: Finished difference Result 461 states and 1283 transitions. [2021-05-03 14:57:24,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:57:24,779 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 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 20 [2021-05-03 14:57:24,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:57:24,779 INFO L225 Difference]: With dead ends: 461 [2021-05-03 14:57:24,779 INFO L226 Difference]: Without dead ends: 446 [2021-05-03 14:57:24,779 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 9138.5ms TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:57:24,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-05-03 14:57:24,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 261. [2021-05-03 14:57:24,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 2.9153846153846152) internal successors, (758), 260 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:57:24,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 758 transitions. [2021-05-03 14:57:24,783 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 758 transitions. Word has length 20 [2021-05-03 14:57:24,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:57:24,783 INFO L480 AbstractCegarLoop]: Abstraction has 261 states and 758 transitions. [2021-05-03 14:57:24,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:57:24,783 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 758 transitions. [2021-05-03 14:57:24,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:57:24,783 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:57:24,783 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:57:24,984 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1111 [2021-05-03 14:57:24,984 INFO L428 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:57:24,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:57:24,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1096371704, now seen corresponding path program 7 times [2021-05-03 14:57:24,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:57:24,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537989099] [2021-05-03 14:57:24,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:57:24,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:57:25,398 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-05-03 14:57:25,559 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-05-03 14:57:25,732 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-03 14:57:25,869 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:57:25,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537989099] [2021-05-03 14:57:25,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009317892] [2021-05-03 14:57:25,869 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:57:25,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:57:25,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:57:25,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:57:26,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:26,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:57:26,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:27,245 WARN L205 SmtUtils]: Spent 586.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 96 [2021-05-03 14:57:27,246 INFO L628 ElimStorePlain]: treesize reduction 171, result has 67.2 percent of original size [2021-05-03 14:57:27,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:27,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:57:27,259 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:27,552 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-05-03 14:57:27,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:57:27,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:27,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:57:27,563 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:27,820 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-05-03 14:57:27,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:57:27,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:27,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:27,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:57:27,829 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:27,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:27,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:57:27,836 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:27,997 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-05-03 14:57:27,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:57:28,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:28,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:28,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:57:28,004 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:28,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:28,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:57:28,011 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:28,252 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-05-03 14:57:28,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:57:28,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:28,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:28,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 14:57:28,264 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:28,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:28,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:57:28,271 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:28,466 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-05-03 14:57:28,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:57:28,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-05-03 14:57:28,484 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:529, output treesize:241 [2021-05-03 14:57:28,926 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 88 [2021-05-03 14:57:29,505 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-05-03 14:57:29,731 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-05-03 14:57:29,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:57:29,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:57:29,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:57:29,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760374626] [2021-05-03 14:57:29,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:57:29,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:57:29,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:57:29,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:57:29,884 INFO L87 Difference]: Start difference. First operand 261 states and 758 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:57:30,049 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2021-05-03 14:57:30,420 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2021-05-03 14:57:30,796 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 60 [2021-05-03 14:57:31,454 WARN L205 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 64 [2021-05-03 14:57:32,970 WARN L205 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 171 DAG size of output: 131 [2021-05-03 14:57:33,999 WARN L205 SmtUtils]: Spent 835.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 80 [2021-05-03 14:57:35,138 WARN L205 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 135 DAG size of output: 85 [2021-05-03 14:57:36,517 WARN L205 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 149 DAG size of output: 92 [2021-05-03 14:57:36,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:57:36,582 INFO L93 Difference]: Finished difference Result 438 states and 1238 transitions. [2021-05-03 14:57:36,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:57:36,584 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 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 20 [2021-05-03 14:57:36,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:57:36,584 INFO L225 Difference]: With dead ends: 438 [2021-05-03 14:57:36,584 INFO L226 Difference]: Without dead ends: 423 [2021-05-03 14:57:36,584 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 7977.7ms TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:57:36,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-05-03 14:57:36,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 261. [2021-05-03 14:57:36,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 2.9153846153846152) internal successors, (758), 260 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:57:36,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 758 transitions. [2021-05-03 14:57:36,588 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 758 transitions. Word has length 20 [2021-05-03 14:57:36,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:57:36,588 INFO L480 AbstractCegarLoop]: Abstraction has 261 states and 758 transitions. [2021-05-03 14:57:36,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:57:36,588 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 758 transitions. [2021-05-03 14:57:36,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:57:36,588 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:57:36,588 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:57:36,789 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1375 [2021-05-03 14:57:36,789 INFO L428 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:57:36,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:57:36,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1137578486, now seen corresponding path program 8 times [2021-05-03 14:57:36,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:57:36,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314832667] [2021-05-03 14:57:36,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:57:36,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:57:37,275 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2021-05-03 14:57:37,490 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-05-03 14:57:37,630 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-05-03 14:57:37,741 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:57:37,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314832667] [2021-05-03 14:57:37,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798344832] [2021-05-03 14:57:37,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:57:37,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:57:37,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:57:37,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:57:37,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:57:37,996 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-05-03 14:57:38,764 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-05-03 14:57:39,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:39,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:39,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-05-03 14:57:39,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:39,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:39,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:39,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 14:57:39,486 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:39,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:39,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 14:57:39,499 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:40,516 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 140 DAG size of output: 134 [2021-05-03 14:57:40,517 INFO L628 ElimStorePlain]: treesize reduction 193, result has 73.3 percent of original size [2021-05-03 14:57:40,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:40,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:40,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:57:40,531 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:40,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:40,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:57:40,543 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:41,007 WARN L205 SmtUtils]: Spent 463.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-05-03 14:57:41,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:57:41,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:41,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:41,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:57:41,021 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:41,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:41,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:57:41,036 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:41,494 WARN L205 SmtUtils]: Spent 457.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2021-05-03 14:57:41,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:57:41,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:41,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:57:41,507 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:41,973 WARN L205 SmtUtils]: Spent 465.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-05-03 14:57:41,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:57:41,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:41,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:57:41,986 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:42,440 WARN L205 SmtUtils]: Spent 453.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-05-03 14:57:42,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:57:42,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:42,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:57:42,453 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:42,892 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-05-03 14:57:42,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:57:42,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:42,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:57:42,904 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:43,370 WARN L205 SmtUtils]: Spent 465.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-05-03 14:57:43,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:57:43,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:43,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:43,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:57:43,384 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:43,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:43,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:57:43,397 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:43,835 WARN L205 SmtUtils]: Spent 437.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-05-03 14:57:43,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:57:43,850 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: 10 dim-0 vars, and 12 xjuncts. [2021-05-03 14:57:43,850 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 16 variables, input treesize:833, output treesize:435 [2021-05-03 14:57:44,605 WARN L205 SmtUtils]: Spent 648.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 139 [2021-05-03 14:57:45,201 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_190, v_prenex_192, v_prenex_194, v_prenex_184, get_6, v_prenex_196, v_prenex_186, v_prenex_198, v_prenex_188, v_prenex_210, v_prenex_200, v_prenex_223, v_prenex_212, v_prenex_202, v_prenex_214, v_prenex_204, v_prenex_216, v_prenex_206, v_prenex_218, v_prenex_208], 1=[v_prenex_191, get_3, v_prenex_193, v_prenex_183, v_prenex_195, v_prenex_185, v_prenex_197, v_prenex_187, v_prenex_199, v_prenex_222, v_prenex_189, v_prenex_211, v_prenex_201, v_prenex_213, v_prenex_203, v_prenex_215, v_prenex_205, v_prenex_217, v_prenex_207, v_prenex_209]} [2021-05-03 14:57:45,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-05-03 14:57:45,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:45,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-05-03 14:57:45,246 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:45,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-05-03 14:57:45,266 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:46,643 WARN L205 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 365 DAG size of output: 148 [2021-05-03 14:57:46,644 INFO L628 ElimStorePlain]: treesize reduction 1617, result has 23.3 percent of original size [2021-05-03 14:57:46,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:57:46,653 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:46,984 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-05-03 14:57:46,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:57:47,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 14:57:47,012 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:47,401 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2021-05-03 14:57:47,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:57:47,402 INFO L518 ElimStorePlain]: Eliminatee v_prenex_184 vanished before elimination [2021-05-03 14:57:47,402 INFO L518 ElimStorePlain]: Eliminatee get_6 vanished before elimination [2021-05-03 14:57:47,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 14:57:47,415 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:47,855 WARN L205 SmtUtils]: Spent 440.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-05-03 14:57:47,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:57:47,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 14:57:47,868 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:48,307 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-05-03 14:57:48,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:57:48,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:57:48,319 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:48,739 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-05-03 14:57:48,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:57:48,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-05-03 14:57:48,750 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:49,158 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-05-03 14:57:49,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:57:49,158 INFO L518 ElimStorePlain]: Eliminatee v_prenex_210 vanished before elimination [2021-05-03 14:57:49,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:57:49,171 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:49,581 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-05-03 14:57:49,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:57:49,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 14:57:49,594 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:49,988 WARN L205 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-05-03 14:57:49,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:57:49,988 INFO L518 ElimStorePlain]: Eliminatee v_prenex_212 vanished before elimination [2021-05-03 14:57:49,988 INFO L518 ElimStorePlain]: Eliminatee v_prenex_202 vanished before elimination [2021-05-03 14:57:49,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 14:57:50,000 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:50,397 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-05-03 14:57:50,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:57:50,398 INFO L518 ElimStorePlain]: Eliminatee v_prenex_204 vanished before elimination [2021-05-03 14:57:50,398 INFO L518 ElimStorePlain]: Eliminatee v_prenex_216 vanished before elimination [2021-05-03 14:57:50,398 INFO L518 ElimStorePlain]: Eliminatee v_prenex_206 vanished before elimination [2021-05-03 14:57:50,398 INFO L518 ElimStorePlain]: Eliminatee v_prenex_218 vanished before elimination [2021-05-03 14:57:50,398 INFO L518 ElimStorePlain]: Eliminatee v_prenex_208 vanished before elimination [2021-05-03 14:57:50,398 INFO L518 ElimStorePlain]: Eliminatee v_prenex_191 vanished before elimination [2021-05-03 14:57:50,398 INFO L518 ElimStorePlain]: Eliminatee get_3 vanished before elimination [2021-05-03 14:57:50,398 INFO L518 ElimStorePlain]: Eliminatee v_prenex_193 vanished before elimination [2021-05-03 14:57:50,399 INFO L518 ElimStorePlain]: Eliminatee v_prenex_183 vanished before elimination [2021-05-03 14:57:50,399 INFO L518 ElimStorePlain]: Eliminatee v_prenex_195 vanished before elimination [2021-05-03 14:57:50,399 INFO L518 ElimStorePlain]: Eliminatee v_prenex_185 vanished before elimination [2021-05-03 14:57:50,399 INFO L518 ElimStorePlain]: Eliminatee v_prenex_197 vanished before elimination [2021-05-03 14:57:50,399 INFO L518 ElimStorePlain]: Eliminatee v_prenex_187 vanished before elimination [2021-05-03 14:57:50,399 INFO L518 ElimStorePlain]: Eliminatee v_prenex_199 vanished before elimination [2021-05-03 14:57:50,399 INFO L518 ElimStorePlain]: Eliminatee v_prenex_222 vanished before elimination [2021-05-03 14:57:50,399 INFO L518 ElimStorePlain]: Eliminatee v_prenex_189 vanished before elimination [2021-05-03 14:57:50,399 INFO L518 ElimStorePlain]: Eliminatee v_prenex_211 vanished before elimination [2021-05-03 14:57:50,399 INFO L518 ElimStorePlain]: Eliminatee v_prenex_201 vanished before elimination [2021-05-03 14:57:50,399 INFO L518 ElimStorePlain]: Eliminatee v_prenex_213 vanished before elimination [2021-05-03 14:57:50,399 INFO L518 ElimStorePlain]: Eliminatee v_prenex_203 vanished before elimination [2021-05-03 14:57:50,399 INFO L518 ElimStorePlain]: Eliminatee v_prenex_215 vanished before elimination [2021-05-03 14:57:50,399 INFO L518 ElimStorePlain]: Eliminatee v_prenex_205 vanished before elimination [2021-05-03 14:57:50,399 INFO L518 ElimStorePlain]: Eliminatee v_prenex_217 vanished before elimination [2021-05-03 14:57:50,399 INFO L518 ElimStorePlain]: Eliminatee v_prenex_207 vanished before elimination [2021-05-03 14:57:50,399 INFO L518 ElimStorePlain]: Eliminatee v_prenex_209 vanished before elimination [2021-05-03 14:57:50,404 INFO L550 ElimStorePlain]: Start of recursive call 1: 20 dim-0 vars, 40 dim-1 vars, End of recursive call: and 16 xjuncts. [2021-05-03 14:57:50,405 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 60 variables, input treesize:2201, output treesize:346 [2021-05-03 14:57:51,058 WARN L205 SmtUtils]: Spent 592.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-05-03 14:57:51,440 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 14:57:51,666 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-05-03 14:57:51,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:57:51,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:57:51,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:57:51,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26935096] [2021-05-03 14:57:51,689 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:57:51,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:57:51,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:57:51,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:57:51,690 INFO L87 Difference]: Start difference. First operand 261 states and 758 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:57:52,050 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2021-05-03 14:57:52,555 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 82 [2021-05-03 14:57:53,183 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 86 [2021-05-03 14:57:54,690 WARN L205 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 181 DAG size of output: 178 [2021-05-03 14:57:55,498 WARN L205 SmtUtils]: Spent 734.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 95 [2021-05-03 14:57:56,584 WARN L205 SmtUtils]: Spent 980.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 106 [2021-05-03 14:57:57,891 WARN L205 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 137 DAG size of output: 115 [2021-05-03 14:57:57,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:57:57,936 INFO L93 Difference]: Finished difference Result 465 states and 1296 transitions. [2021-05-03 14:57:57,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:57:57,937 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 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 20 [2021-05-03 14:57:57,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:57:57,937 INFO L225 Difference]: With dead ends: 465 [2021-05-03 14:57:57,938 INFO L226 Difference]: Without dead ends: 450 [2021-05-03 14:57:57,938 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 8877.1ms TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:57:57,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-05-03 14:57:57,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 261. [2021-05-03 14:57:57,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 2.9153846153846152) internal successors, (758), 260 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:57:57,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 758 transitions. [2021-05-03 14:57:57,941 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 758 transitions. Word has length 20 [2021-05-03 14:57:57,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:57:57,941 INFO L480 AbstractCegarLoop]: Abstraction has 261 states and 758 transitions. [2021-05-03 14:57:57,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:57:57,941 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 758 transitions. [2021-05-03 14:57:57,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:57:57,941 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:57:57,941 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:57:58,141 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1472,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:57:58,142 INFO L428 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:57:58,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:57:58,142 INFO L82 PathProgramCache]: Analyzing trace with hash -561141902, now seen corresponding path program 9 times [2021-05-03 14:57:58,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:57:58,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982742848] [2021-05-03 14:57:58,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:57:58,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:57:58,502 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-05-03 14:57:58,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:57:58,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982742848] [2021-05-03 14:57:58,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918956252] [2021-05-03 14:57:58,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:57:58,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 14:57:58,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:57:58,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:57:58,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:57:59,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:59,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:57:59,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:59,626 WARN L205 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 96 [2021-05-03 14:57:59,626 INFO L628 ElimStorePlain]: treesize reduction 171, result has 67.2 percent of original size [2021-05-03 14:57:59,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:59,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:57:59,634 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:59,799 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-05-03 14:57:59,800 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:57:59,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:59,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:57:59,806 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:59,986 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-05-03 14:57:59,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:57:59,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:59,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:59,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:57:59,994 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:57:59,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:57:59,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 14:58:00,000 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:00,148 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-05-03 14:58:00,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:58:00,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:00,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:00,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:58:00,156 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:00,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:00,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:58:00,162 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:00,321 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-05-03 14:58:00,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:58:00,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:00,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:00,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:58:00,330 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:00,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:00,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:58:00,338 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:00,493 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-05-03 14:58:00,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:58:00,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-05-03 14:58:00,503 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:529, output treesize:241 [2021-05-03 14:58:00,830 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 88 [2021-05-03 14:58:01,428 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-05-03 14:58:01,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:58:01,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:58:01,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:58:01,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452928845] [2021-05-03 14:58:01,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:58:01,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:58:01,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:58:01,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:58:01,574 INFO L87 Difference]: Start difference. First operand 261 states and 758 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:58:01,995 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2021-05-03 14:58:02,394 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 69 [2021-05-03 14:58:02,878 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 73 [2021-05-03 14:58:03,723 WARN L205 SmtUtils]: Spent 707.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 135 [2021-05-03 14:58:04,482 WARN L205 SmtUtils]: Spent 670.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 90 [2021-05-03 14:58:05,376 WARN L205 SmtUtils]: Spent 759.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 94 [2021-05-03 14:58:06,417 WARN L205 SmtUtils]: Spent 966.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 101 [2021-05-03 14:58:06,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:58:06,454 INFO L93 Difference]: Finished difference Result 472 states and 1312 transitions. [2021-05-03 14:58:06,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:58:06,455 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 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 20 [2021-05-03 14:58:06,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:58:06,455 INFO L225 Difference]: With dead ends: 472 [2021-05-03 14:58:06,456 INFO L226 Difference]: Without dead ends: 457 [2021-05-03 14:58:06,456 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 5711.1ms TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:58:06,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-05-03 14:58:06,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 264. [2021-05-03 14:58:06,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.923954372623574) internal successors, (769), 263 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:58:06,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 769 transitions. [2021-05-03 14:58:06,459 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 769 transitions. Word has length 20 [2021-05-03 14:58:06,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:58:06,459 INFO L480 AbstractCegarLoop]: Abstraction has 264 states and 769 transitions. [2021-05-03 14:58:06,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:58:06,459 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 769 transitions. [2021-05-03 14:58:06,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:58:06,459 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:58:06,459 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:58:06,659 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1609,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:58:06,660 INFO L428 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:58:06,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:58:06,660 INFO L82 PathProgramCache]: Analyzing trace with hash -734389594, now seen corresponding path program 10 times [2021-05-03 14:58:06,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:58:06,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514068269] [2021-05-03 14:58:06,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:58:06,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:58:07,050 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2021-05-03 14:58:07,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:58:07,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514068269] [2021-05-03 14:58:07,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827956288] [2021-05-03 14:58:07,306 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:58:07,327 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:58:07,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:58:07,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:58:07,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:58:07,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:07,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:58:07,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:08,323 WARN L205 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 96 [2021-05-03 14:58:08,324 INFO L628 ElimStorePlain]: treesize reduction 171, result has 67.2 percent of original size [2021-05-03 14:58:08,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:08,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:08,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:58:08,339 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:08,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:08,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:58:08,348 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:08,547 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-05-03 14:58:08,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:58:08,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:08,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:08,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:58:08,557 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:08,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:08,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:58:08,566 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:08,756 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-05-03 14:58:08,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:58:08,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:08,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:08,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 14:58:08,770 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:08,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:08,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:58:08,787 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:08,967 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-05-03 14:58:08,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:58:08,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:08,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:58:08,976 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:09,136 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-05-03 14:58:09,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:58:09,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:09,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:58:09,144 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:09,298 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-05-03 14:58:09,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:58:09,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-05-03 14:58:09,307 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:529, output treesize:241 [2021-05-03 14:58:09,611 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 88 [2021-05-03 14:58:09,879 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 69 [2021-05-03 14:58:10,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:58:10,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:58:10,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:58:10,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459369803] [2021-05-03 14:58:10,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:58:10,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:58:10,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:58:10,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:58:10,338 INFO L87 Difference]: Start difference. First operand 264 states and 769 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:58:10,731 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 64 [2021-05-03 14:58:11,122 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 68 [2021-05-03 14:58:11,635 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 72 [2021-05-03 14:58:12,904 WARN L205 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 168 DAG size of output: 141 [2021-05-03 14:58:14,657 WARN L205 SmtUtils]: Spent 1.61 s on a formula simplification. DAG size of input: 189 DAG size of output: 146 [2021-05-03 14:58:15,164 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 90 [2021-05-03 14:58:15,735 WARN L205 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 99 [2021-05-03 14:58:15,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:58:15,776 INFO L93 Difference]: Finished difference Result 439 states and 1237 transitions. [2021-05-03 14:58:15,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:58:15,777 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 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 20 [2021-05-03 14:58:15,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:58:15,778 INFO L225 Difference]: With dead ends: 439 [2021-05-03 14:58:15,778 INFO L226 Difference]: Without dead ends: 424 [2021-05-03 14:58:15,778 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 6446.7ms TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:58:15,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-05-03 14:58:15,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 261. [2021-05-03 14:58:15,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 2.9153846153846152) internal successors, (758), 260 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:58:15,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 758 transitions. [2021-05-03 14:58:15,781 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 758 transitions. Word has length 20 [2021-05-03 14:58:15,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:58:15,781 INFO L480 AbstractCegarLoop]: Abstraction has 261 states and 758 transitions. [2021-05-03 14:58:15,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:58:15,781 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 758 transitions. [2021-05-03 14:58:15,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:58:15,781 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:58:15,781 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:58:15,982 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1705,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:58:15,982 INFO L428 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:58:15,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:58:15,982 INFO L82 PathProgramCache]: Analyzing trace with hash 2043738866, now seen corresponding path program 11 times [2021-05-03 14:58:15,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:58:15,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8996177] [2021-05-03 14:58:15,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:58:15,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:58:16,375 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-05-03 14:58:16,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:58:16,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8996177] [2021-05-03 14:58:16,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287830962] [2021-05-03 14:58:16,721 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:58:16,742 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:58:16,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:58:16,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 14:58:16,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:58:17,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 14:58:17,047 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:17,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:58:17,055 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:17,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:58:17,062 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:17,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:58:17,069 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:17,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-05-03 14:58:17,077 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:17,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-05-03 14:58:17,084 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:17,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 14:58:17,092 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:17,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 14:58:17,101 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:17,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-05-03 14:58:17,108 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:17,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:58:17,116 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:17,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-05-03 14:58:17,124 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:17,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-05-03 14:58:17,132 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:17,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-05-03 14:58:17,141 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:17,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 14:58:17,149 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:17,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-05-03 14:58:17,157 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:17,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 14:58:17,166 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:17,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-05-03 14:58:17,174 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:17,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 14:58:17,182 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:17,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 14:58:17,190 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:17,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-05-03 14:58:17,200 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:17,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 14:58:17,208 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:17,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 14:58:17,228 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:17,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 14:58:17,237 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:17,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-05-03 14:58:17,245 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:17,548 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2021-05-03 14:58:17,549 INFO L628 ElimStorePlain]: treesize reduction 168, result has 61.2 percent of original size [2021-05-03 14:58:17,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 12 xjuncts. [2021-05-03 14:58:17,551 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 1 variables, input treesize:1009, output treesize:265 [2021-05-03 14:58:17,725 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-05-03 14:58:17,979 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-05-03 14:58:18,134 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 14:58:18,409 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-05-03 14:58:18,577 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-05-03 14:58:18,594 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:58:18,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:58:18,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 14:58:18,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919241370] [2021-05-03 14:58:18,595 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 14:58:18,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:58:18,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 14:58:18,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:58:18,595 INFO L87 Difference]: Start difference. First operand 261 states and 758 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:58:18,925 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-05-03 14:58:19,227 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2021-05-03 14:58:19,866 WARN L205 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 84 [2021-05-03 14:58:20,597 WARN L205 SmtUtils]: Spent 628.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 93 [2021-05-03 14:58:20,852 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 39 [2021-05-03 14:58:21,677 WARN L205 SmtUtils]: Spent 745.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 107 [2021-05-03 14:58:23,043 WARN L205 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 146 DAG size of output: 113 [2021-05-03 14:58:24,527 WARN L205 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 159 DAG size of output: 122 [2021-05-03 14:58:24,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:58:24,572 INFO L93 Difference]: Finished difference Result 545 states and 1502 transitions. [2021-05-03 14:58:24,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:58:24,573 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 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 20 [2021-05-03 14:58:24,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:58:24,574 INFO L225 Difference]: With dead ends: 545 [2021-05-03 14:58:24,574 INFO L226 Difference]: Without dead ends: 456 [2021-05-03 14:58:24,574 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 7285.9ms TimeCoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:58:24,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-05-03 14:58:24,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 317. [2021-05-03 14:58:24,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.8322784810126582) internal successors, (895), 316 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:58:24,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 895 transitions. [2021-05-03 14:58:24,577 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 895 transitions. Word has length 20 [2021-05-03 14:58:24,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:58:24,578 INFO L480 AbstractCegarLoop]: Abstraction has 317 states and 895 transitions. [2021-05-03 14:58:24,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:58:24,578 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 895 transitions. [2021-05-03 14:58:24,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:58:24,578 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:58:24,578 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:58:24,778 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1782,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:58:24,778 INFO L428 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:58:24,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:58:24,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1244698862, now seen corresponding path program 12 times [2021-05-03 14:58:24,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:58:24,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403911892] [2021-05-03 14:58:24,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:58:24,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:58:25,248 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:58:25,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403911892] [2021-05-03 14:58:25,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110106931] [2021-05-03 14:58:25,248 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:58:25,269 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 14:58:25,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:58:25,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 14:58:25,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:58:25,621 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 59 [2021-05-03 14:58:26,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:26,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:26,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 14:58:26,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:26,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:26,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:26,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-05-03 14:58:26,479 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:26,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:26,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:26,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:58:26,490 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:26,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:26,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:26,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-05-03 14:58:26,502 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:26,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:26,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:26,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:58:26,514 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:26,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:26,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-05-03 14:58:26,524 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:27,277 WARN L205 SmtUtils]: Spent 752.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 90 [2021-05-03 14:58:27,278 INFO L628 ElimStorePlain]: treesize reduction 629, result has 45.6 percent of original size [2021-05-03 14:58:27,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:27,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:27,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:58:27,287 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:27,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:27,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:27,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:58:27,295 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:27,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:27,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 14:58:27,304 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:27,894 WARN L205 SmtUtils]: Spent 589.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 85 [2021-05-03 14:58:27,895 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.8 percent of original size [2021-05-03 14:58:27,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:27,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:27,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:58:27,903 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:27,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:27,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:27,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:58:27,912 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:27,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:27,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:58:27,920 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:28,474 WARN L205 SmtUtils]: Spent 553.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 80 [2021-05-03 14:58:28,475 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.8 percent of original size [2021-05-03 14:58:28,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:28,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:28,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:58:28,483 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:28,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:28,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:28,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:58:28,492 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:28,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:28,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:58:28,499 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:28,763 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-05-03 14:58:28,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:58:28,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 10 dim-0 vars, and 12 xjuncts. [2021-05-03 14:58:28,775 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:1273, output treesize:409 [2021-05-03 14:58:29,053 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2021-05-03 14:58:29,441 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2021-05-03 14:58:30,161 WARN L205 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 141 [2021-05-03 14:58:30,758 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_290, v_prenex_281, v_prenex_293, v_prenex_284, v_prenex_295, get_6, v_prenex_286, v_prenex_297, v_prenex_275, v_prenex_321, v_prenex_288, v_prenex_299, v_prenex_277, v_prenex_311, v_prenex_301, v_prenex_279, v_prenex_313, v_prenex_303, v_prenex_315, v_prenex_327, v_prenex_305, v_prenex_318, v_prenex_307, v_prenex_309], 1=[v_prenex_280, v_prenex_291, v_prenex_282, v_prenex_294, v_prenex_285, v_prenex_296, v_prenex_287, v_prenex_298, v_prenex_276, v_prenex_310, v_prenex_300, v_prenex_322, v_prenex_289, v_prenex_278, v_prenex_312, get_0, v_prenex_302, v_prenex_314, v_prenex_304, v_prenex_316, v_prenex_306, v_prenex_329, v_prenex_319, v_prenex_308]} [2021-05-03 14:58:30,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:58:30,782 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:32,107 WARN L205 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 433 DAG size of output: 172 [2021-05-03 14:58:32,108 INFO L628 ElimStorePlain]: treesize reduction 1982, result has 21.6 percent of original size [2021-05-03 14:58:32,108 INFO L518 ElimStorePlain]: Eliminatee v_prenex_281 vanished before elimination [2021-05-03 14:58:32,108 INFO L518 ElimStorePlain]: Eliminatee v_prenex_293 vanished before elimination [2021-05-03 14:58:32,108 INFO L518 ElimStorePlain]: Eliminatee v_prenex_284 vanished before elimination [2021-05-03 14:58:32,108 INFO L518 ElimStorePlain]: Eliminatee v_prenex_295 vanished before elimination [2021-05-03 14:58:32,108 INFO L518 ElimStorePlain]: Eliminatee get_6 vanished before elimination [2021-05-03 14:58:32,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 14:58:32,120 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:32,466 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2021-05-03 14:58:32,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:58:32,467 INFO L518 ElimStorePlain]: Eliminatee v_prenex_297 vanished before elimination [2021-05-03 14:58:32,467 INFO L518 ElimStorePlain]: Eliminatee v_prenex_275 vanished before elimination [2021-05-03 14:58:32,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 14:58:32,478 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:32,820 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-05-03 14:58:32,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:58:32,820 INFO L518 ElimStorePlain]: Eliminatee v_prenex_288 vanished before elimination [2021-05-03 14:58:32,820 INFO L518 ElimStorePlain]: Eliminatee v_prenex_299 vanished before elimination [2021-05-03 14:58:32,820 INFO L518 ElimStorePlain]: Eliminatee v_prenex_277 vanished before elimination [2021-05-03 14:58:32,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 14:58:32,830 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:33,176 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2021-05-03 14:58:33,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:58:33,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:58:33,186 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:33,545 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2021-05-03 14:58:33,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:58:33,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 14:58:33,557 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:33,876 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2021-05-03 14:58:33,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:58:33,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 14:58:33,886 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:34,201 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-05-03 14:58:34,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:58:34,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:58:34,211 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:34,523 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2021-05-03 14:58:34,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:58:34,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-05-03 14:58:34,532 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:34,837 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2021-05-03 14:58:34,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:58:34,838 INFO L518 ElimStorePlain]: Eliminatee v_prenex_327 vanished before elimination [2021-05-03 14:58:34,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-05-03 14:58:34,846 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:35,150 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-05-03 14:58:35,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:58:35,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 14:58:35,159 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:35,473 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-05-03 14:58:35,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:58:35,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 14:58:35,482 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:35,817 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-05-03 14:58:35,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:58:35,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:58:35,826 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:36,151 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-05-03 14:58:36,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:58:36,152 INFO L518 ElimStorePlain]: Eliminatee v_prenex_280 vanished before elimination [2021-05-03 14:58:36,152 INFO L518 ElimStorePlain]: Eliminatee v_prenex_291 vanished before elimination [2021-05-03 14:58:36,152 INFO L518 ElimStorePlain]: Eliminatee v_prenex_282 vanished before elimination [2021-05-03 14:58:36,152 INFO L518 ElimStorePlain]: Eliminatee v_prenex_294 vanished before elimination [2021-05-03 14:58:36,152 INFO L518 ElimStorePlain]: Eliminatee v_prenex_285 vanished before elimination [2021-05-03 14:58:36,152 INFO L518 ElimStorePlain]: Eliminatee v_prenex_296 vanished before elimination [2021-05-03 14:58:36,152 INFO L518 ElimStorePlain]: Eliminatee v_prenex_287 vanished before elimination [2021-05-03 14:58:36,152 INFO L518 ElimStorePlain]: Eliminatee v_prenex_298 vanished before elimination [2021-05-03 14:58:36,152 INFO L518 ElimStorePlain]: Eliminatee v_prenex_276 vanished before elimination [2021-05-03 14:58:36,152 INFO L518 ElimStorePlain]: Eliminatee v_prenex_310 vanished before elimination [2021-05-03 14:58:36,152 INFO L518 ElimStorePlain]: Eliminatee v_prenex_300 vanished before elimination [2021-05-03 14:58:36,152 INFO L518 ElimStorePlain]: Eliminatee v_prenex_322 vanished before elimination [2021-05-03 14:58:36,153 INFO L518 ElimStorePlain]: Eliminatee v_prenex_289 vanished before elimination [2021-05-03 14:58:36,153 INFO L518 ElimStorePlain]: Eliminatee v_prenex_278 vanished before elimination [2021-05-03 14:58:36,153 INFO L518 ElimStorePlain]: Eliminatee v_prenex_312 vanished before elimination [2021-05-03 14:58:36,153 INFO L518 ElimStorePlain]: Eliminatee get_0 vanished before elimination [2021-05-03 14:58:36,153 INFO L518 ElimStorePlain]: Eliminatee v_prenex_302 vanished before elimination [2021-05-03 14:58:36,153 INFO L518 ElimStorePlain]: Eliminatee v_prenex_314 vanished before elimination [2021-05-03 14:58:36,153 INFO L518 ElimStorePlain]: Eliminatee v_prenex_304 vanished before elimination [2021-05-03 14:58:36,153 INFO L518 ElimStorePlain]: Eliminatee v_prenex_316 vanished before elimination [2021-05-03 14:58:36,153 INFO L518 ElimStorePlain]: Eliminatee v_prenex_306 vanished before elimination [2021-05-03 14:58:36,153 INFO L518 ElimStorePlain]: Eliminatee v_prenex_329 vanished before elimination [2021-05-03 14:58:36,153 INFO L518 ElimStorePlain]: Eliminatee v_prenex_319 vanished before elimination [2021-05-03 14:58:36,153 INFO L518 ElimStorePlain]: Eliminatee v_prenex_308 vanished before elimination [2021-05-03 14:58:36,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 24 dim-0 vars, 48 dim-1 vars, End of recursive call: and 18 xjuncts. [2021-05-03 14:58:36,158 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 72 variables, input treesize:2535, output treesize:369 [2021-05-03 14:58:36,720 WARN L205 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-05-03 14:58:36,973 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2021-05-03 14:58:37,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:58:37,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:58:37,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:58:37,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610795151] [2021-05-03 14:58:37,006 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:58:37,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:58:37,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:58:37,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:58:37,006 INFO L87 Difference]: Start difference. First operand 317 states and 895 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:58:37,265 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 76 [2021-05-03 14:58:37,783 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 80 [2021-05-03 14:58:39,115 WARN L205 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 178 DAG size of output: 177 [2021-05-03 14:58:39,379 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-05-03 14:58:40,717 WARN L205 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 182 DAG size of output: 181 [2021-05-03 14:58:41,091 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-05-03 14:58:43,807 WARN L205 SmtUtils]: Spent 2.59 s on a formula simplification. DAG size of input: 213 DAG size of output: 212 [2021-05-03 14:58:44,258 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 79 [2021-05-03 14:58:45,863 WARN L205 SmtUtils]: Spent 1.47 s on a formula simplification. DAG size of input: 210 DAG size of output: 202 [2021-05-03 14:58:46,186 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2021-05-03 14:58:48,856 WARN L205 SmtUtils]: Spent 2.59 s on a formula simplification. DAG size of input: 225 DAG size of output: 215 [2021-05-03 14:58:49,178 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-05-03 14:58:49,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:58:49,209 INFO L93 Difference]: Finished difference Result 579 states and 1547 transitions. [2021-05-03 14:58:49,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:58:49,210 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 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 20 [2021-05-03 14:58:49,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:58:49,211 INFO L225 Difference]: With dead ends: 579 [2021-05-03 14:58:49,211 INFO L226 Difference]: Without dead ends: 549 [2021-05-03 14:58:49,211 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 14187.3ms TimeCoverageRelationStatistics Valid=197, Invalid=859, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 14:58:49,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-05-03 14:58:49,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 329. [2021-05-03 14:58:49,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.8445121951219514) internal successors, (933), 328 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:58:49,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 933 transitions. [2021-05-03 14:58:49,215 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 933 transitions. Word has length 20 [2021-05-03 14:58:49,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:58:49,215 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 933 transitions. [2021-05-03 14:58:49,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:58:49,215 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 933 transitions. [2021-05-03 14:58:49,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:58:49,216 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:58:49,216 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:58:49,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1805,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:58:49,416 INFO L428 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:58:49,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:58:49,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1723983538, now seen corresponding path program 13 times [2021-05-03 14:58:49,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:58:49,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687925298] [2021-05-03 14:58:49,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:58:49,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:58:49,670 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-05-03 14:58:49,792 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-05-03 14:58:50,041 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:58:50,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687925298] [2021-05-03 14:58:50,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270795583] [2021-05-03 14:58:50,041 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:58:50,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:58:50,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:58:50,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:58:50,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:50,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:50,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 14:58:50,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:50,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:50,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:50,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 14:58:50,674 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:50,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:50,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:50,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 14:58:50,685 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:50,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:50,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:50,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 14:58:50,696 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:50,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:50,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:50,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-05-03 14:58:50,706 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:50,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:50,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-05-03 14:58:50,716 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:51,130 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2021-05-03 14:58:51,130 INFO L628 ElimStorePlain]: treesize reduction 317, result has 45.3 percent of original size [2021-05-03 14:58:51,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:51,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:51,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:58:51,140 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:51,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:51,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:51,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:58:51,149 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:51,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:51,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:58:51,157 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:51,335 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-03 14:58:51,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:58:51,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:51,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:51,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:58:51,345 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:51,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:51,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:51,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:58:51,354 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:51,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:58:51,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:58:51,363 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 14:58:51,660 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2021-05-03 14:58:51,660 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.5 percent of original size [2021-05-03 14:58:51,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-05-03 14:58:51,670 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:757, output treesize:194 [2021-05-03 14:58:51,840 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-05-03 14:58:52,092 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-05-03 14:58:52,727 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-05-03 14:58:52,903 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-05-03 14:58:53,034 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:58:53,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:58:53,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:58:53,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503685315] [2021-05-03 14:58:53,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:58:53,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:58:53,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:58:53,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:58:53,035 INFO L87 Difference]: Start difference. First operand 329 states and 933 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:58:53,263 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-05-03 14:58:53,735 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2021-05-03 14:58:53,932 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-05-03 14:58:54,456 WARN L205 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 108 [2021-05-03 14:58:54,734 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 56 [2021-05-03 14:58:54,964 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-05-03 14:58:55,167 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 36 [2021-05-03 14:58:55,832 WARN L205 SmtUtils]: Spent 575.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 112 [2021-05-03 14:58:56,200 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2021-05-03 14:58:57,425 WARN L205 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 135 DAG size of output: 122 [2021-05-03 14:58:57,794 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2021-05-03 14:58:58,638 WARN L205 SmtUtils]: Spent 796.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 128 [2021-05-03 14:58:59,055 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2021-05-03 14:59:00,437 WARN L205 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 155 DAG size of output: 137 [2021-05-03 14:59:00,819 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 71 [2021-05-03 14:59:00,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:59:00,857 INFO L93 Difference]: Finished difference Result 662 states and 1732 transitions. [2021-05-03 14:59:00,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:59:00,858 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 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 20 [2021-05-03 14:59:00,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:59:00,859 INFO L225 Difference]: With dead ends: 662 [2021-05-03 14:59:00,859 INFO L226 Difference]: Without dead ends: 632 [2021-05-03 14:59:00,859 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 8775.1ms TimeCoverageRelationStatistics Valid=225, Invalid=965, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 14:59:00,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-05-03 14:59:00,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 332. [2021-05-03 14:59:00,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.8519637462235647) internal successors, (944), 331 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:59:00,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 944 transitions. [2021-05-03 14:59:00,863 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 944 transitions. Word has length 20 [2021-05-03 14:59:00,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:59:00,863 INFO L480 AbstractCegarLoop]: Abstraction has 332 states and 944 transitions. [2021-05-03 14:59:00,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:59:00,864 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 944 transitions. [2021-05-03 14:59:00,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:59:00,864 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:59:00,864 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:59:01,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1996,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:59:01,064 INFO L428 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:59:01,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:59:01,065 INFO L82 PathProgramCache]: Analyzing trace with hash 25263150, now seen corresponding path program 14 times [2021-05-03 14:59:01,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:59:01,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979404895] [2021-05-03 14:59:01,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:59:01,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:59:01,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:59:01,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979404895] [2021-05-03 14:59:01,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801424716] [2021-05-03 14:59:01,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:59:01,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:59:01,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:59:01,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:59:01,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:59:02,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:02,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:02,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:59:02,211 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:02,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:02,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:02,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-05-03 14:59:02,220 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:02,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:02,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:02,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:59:02,230 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:02,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:02,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:02,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 14:59:02,239 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:02,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:02,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:02,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-05-03 14:59:02,250 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:02,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:02,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-05-03 14:59:02,259 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:02,659 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2021-05-03 14:59:02,660 INFO L628 ElimStorePlain]: treesize reduction 331, result has 45.6 percent of original size [2021-05-03 14:59:02,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:02,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:02,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 14:59:02,670 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:02,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:02,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:02,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:59:02,679 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:02,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:02,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:59:02,686 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:02,995 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2021-05-03 14:59:02,996 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.6 percent of original size [2021-05-03 14:59:03,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:03,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:03,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:59:03,004 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:03,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:03,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:03,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:59:03,013 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:03,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:03,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:59:03,020 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:03,169 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-03 14:59:03,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:59:03,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-05-03 14:59:03,179 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:757, output treesize:194 [2021-05-03 14:59:03,614 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-05-03 14:59:04,194 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-05-03 14:59:04,391 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2021-05-03 14:59:04,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:59:04,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:59:04,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:59:04,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833438821] [2021-05-03 14:59:04,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:59:04,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:59:04,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:59:04,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:59:04,511 INFO L87 Difference]: Start difference. First operand 332 states and 944 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:59:04,656 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2021-05-03 14:59:04,977 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 51 [2021-05-03 14:59:05,540 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2021-05-03 14:59:06,311 WARN L205 SmtUtils]: Spent 600.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 120 [2021-05-03 14:59:07,650 WARN L205 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 182 DAG size of output: 125 [2021-05-03 14:59:09,270 WARN L205 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 188 DAG size of output: 135 [2021-05-03 14:59:10,995 WARN L205 SmtUtils]: Spent 1.60 s on a formula simplification. DAG size of input: 201 DAG size of output: 140 [2021-05-03 14:59:13,089 WARN L205 SmtUtils]: Spent 1.95 s on a formula simplification. DAG size of input: 210 DAG size of output: 147 [2021-05-03 14:59:13,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:59:13,115 INFO L93 Difference]: Finished difference Result 488 states and 1331 transitions. [2021-05-03 14:59:13,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:59:13,116 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 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 20 [2021-05-03 14:59:13,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:59:13,117 INFO L225 Difference]: With dead ends: 488 [2021-05-03 14:59:13,117 INFO L226 Difference]: Without dead ends: 466 [2021-05-03 14:59:13,117 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 9580.9ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:59:13,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-05-03 14:59:13,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 326. [2021-05-03 14:59:13,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.8461538461538463) internal successors, (925), 325 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:59:13,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 925 transitions. [2021-05-03 14:59:13,121 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 925 transitions. Word has length 20 [2021-05-03 14:59:13,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:59:13,121 INFO L480 AbstractCegarLoop]: Abstraction has 326 states and 925 transitions. [2021-05-03 14:59:13,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:59:13,121 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 925 transitions. [2021-05-03 14:59:13,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:59:13,121 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:59:13,121 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:59:13,322 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2076,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:59:13,322 INFO L428 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:59:13,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:59:13,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1163299806, now seen corresponding path program 15 times [2021-05-03 14:59:13,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:59:13,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769144672] [2021-05-03 14:59:13,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:59:13,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:59:13,806 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-05-03 14:59:14,081 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:59:14,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769144672] [2021-05-03 14:59:14,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416908327] [2021-05-03 14:59:14,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:59:14,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 14:59:14,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:59:14,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 14:59:14,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:59:14,521 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 55 [2021-05-03 14:59:14,976 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-05-03 14:59:15,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:15,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:59:15,807 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:16,681 WARN L205 SmtUtils]: Spent 873.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 130 [2021-05-03 14:59:16,682 INFO L628 ElimStorePlain]: treesize reduction 248, result has 68.1 percent of original size [2021-05-03 14:59:16,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:16,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:59:16,693 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:17,161 WARN L205 SmtUtils]: Spent 467.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2021-05-03 14:59:17,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:59:17,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:17,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:59:17,173 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:17,597 WARN L205 SmtUtils]: Spent 423.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-05-03 14:59:17,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:59:17,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:17,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:59:17,609 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:18,001 WARN L205 SmtUtils]: Spent 391.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-05-03 14:59:18,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:59:18,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:18,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:18,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:59:18,013 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:18,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:18,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:59:18,028 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:18,428 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-05-03 14:59:18,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:59:18,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:18,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:18,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:59:18,440 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:18,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:18,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:59:18,451 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:18,843 WARN L205 SmtUtils]: Spent 391.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-05-03 14:59:18,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:59:18,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:18,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:18,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:59:18,854 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:18,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:18,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:59:18,863 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:19,221 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-05-03 14:59:19,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:59:19,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:19,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:19,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 14:59:19,232 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:19,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:19,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:59:19,242 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:19,573 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-05-03 14:59:19,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:59:19,588 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: 10 dim-0 vars, and 12 xjuncts. [2021-05-03 14:59:19,589 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 16 variables, input treesize:785, output treesize:399 [2021-05-03 14:59:20,204 WARN L205 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 128 [2021-05-03 14:59:20,770 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 107 [2021-05-03 14:59:21,358 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_404, get_6, v_prenex_396, v_prenex_398, v_prenex_400, v_prenex_402], 1=[v_prenex_405, v_prenex_397, v_prenex_399, get_0, v_prenex_401, v_prenex_403]} [2021-05-03 14:59:21,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 14:59:21,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:21,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-05-03 14:59:21,396 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:21,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 14:59:21,411 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:21,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 14:59:21,427 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:21,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 14:59:21,441 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:21,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-05-03 14:59:21,456 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:22,220 WARN L205 SmtUtils]: Spent 764.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 89 [2021-05-03 14:59:22,221 INFO L628 ElimStorePlain]: treesize reduction 1492, result has 15.2 percent of original size [2021-05-03 14:59:22,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 14:59:22,229 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:22,429 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-05-03 14:59:22,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:59:22,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 14:59:22,438 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:22,650 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-05-03 14:59:22,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:59:22,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 14:59:22,659 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:22,851 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-05-03 14:59:22,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:59:22,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 14:59:22,860 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:23,048 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-05-03 14:59:23,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:59:23,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 14:59:23,057 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:23,243 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-05-03 14:59:23,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:59:23,244 INFO L518 ElimStorePlain]: Eliminatee v_prenex_405 vanished before elimination [2021-05-03 14:59:23,244 INFO L518 ElimStorePlain]: Eliminatee v_prenex_397 vanished before elimination [2021-05-03 14:59:23,244 INFO L518 ElimStorePlain]: Eliminatee v_prenex_399 vanished before elimination [2021-05-03 14:59:23,244 INFO L518 ElimStorePlain]: Eliminatee get_0 vanished before elimination [2021-05-03 14:59:23,244 INFO L518 ElimStorePlain]: Eliminatee v_prenex_401 vanished before elimination [2021-05-03 14:59:23,244 INFO L518 ElimStorePlain]: Eliminatee v_prenex_403 vanished before elimination [2021-05-03 14:59:23,247 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 12 xjuncts. [2021-05-03 14:59:23,247 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 18 variables, input treesize:1953, output treesize:187 [2021-05-03 14:59:23,450 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 14:59:23,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:59:23,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:59:23,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:59:23,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448507774] [2021-05-03 14:59:23,621 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:59:23,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:59:23,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:59:23,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:59:23,622 INFO L87 Difference]: Start difference. First operand 326 states and 925 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:59:23,917 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-05-03 14:59:24,378 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 84 [2021-05-03 14:59:24,833 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 88 [2021-05-03 14:59:26,114 WARN L205 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 177 DAG size of output: 175 [2021-05-03 14:59:28,683 WARN L205 SmtUtils]: Spent 2.45 s on a formula simplification. DAG size of input: 202 DAG size of output: 180 [2021-05-03 14:59:29,547 WARN L205 SmtUtils]: Spent 711.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 103 [2021-05-03 14:59:30,531 WARN L205 SmtUtils]: Spent 922.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 112 [2021-05-03 14:59:30,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:59:30,580 INFO L93 Difference]: Finished difference Result 452 states and 1261 transitions. [2021-05-03 14:59:30,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:59:30,582 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 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 20 [2021-05-03 14:59:30,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:59:30,582 INFO L225 Difference]: With dead ends: 452 [2021-05-03 14:59:30,582 INFO L226 Difference]: Without dead ends: 437 [2021-05-03 14:59:30,582 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 8918.0ms TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:59:30,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-05-03 14:59:30,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 332. [2021-05-03 14:59:30,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.8429003021148036) internal successors, (941), 331 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:59:30,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 941 transitions. [2021-05-03 14:59:30,586 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 941 transitions. Word has length 20 [2021-05-03 14:59:30,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:59:30,586 INFO L480 AbstractCegarLoop]: Abstraction has 332 states and 941 transitions. [2021-05-03 14:59:30,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:59:30,586 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 941 transitions. [2021-05-03 14:59:30,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:59:30,586 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:59:30,586 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:59:30,787 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2156 [2021-05-03 14:59:30,787 INFO L428 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:59:30,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:59:30,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1642584482, now seen corresponding path program 16 times [2021-05-03 14:59:30,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:59:30,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119166010] [2021-05-03 14:59:30,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:59:30,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:59:31,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:59:31,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119166010] [2021-05-03 14:59:31,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350792006] [2021-05-03 14:59:31,282 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:59:31,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:59:31,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:59:31,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:59:31,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:59:32,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:32,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:32,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 14:59:32,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:32,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:32,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:32,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-05-03 14:59:32,191 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:32,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:32,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:32,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 14:59:32,212 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:32,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:32,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:32,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 14:59:32,228 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:32,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:32,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:32,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-05-03 14:59:32,245 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:32,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:32,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 14:59:32,258 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:32,846 WARN L205 SmtUtils]: Spent 588.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2021-05-03 14:59:32,847 INFO L628 ElimStorePlain]: treesize reduction 343, result has 47.8 percent of original size [2021-05-03 14:59:32,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:32,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:32,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-05-03 14:59:32,857 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:32,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:32,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:32,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:59:32,868 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:32,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:32,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:59:32,879 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:33,377 WARN L205 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2021-05-03 14:59:33,378 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.6 percent of original size [2021-05-03 14:59:33,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:33,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:33,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:59:33,389 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:33,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:33,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:33,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:59:33,400 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:33,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:33,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:59:33,409 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:33,658 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-05-03 14:59:33,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:59:33,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-05-03 14:59:33,669 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:847, output treesize:239 [2021-05-03 14:59:33,925 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-05-03 14:59:34,669 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-05-03 14:59:34,941 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-05-03 14:59:35,094 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:59:35,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:59:35,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:59:35,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790046049] [2021-05-03 14:59:35,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:59:35,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:59:35,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:59:35,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:59:35,095 INFO L87 Difference]: Start difference. First operand 332 states and 941 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:59:35,267 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-05-03 14:59:35,743 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2021-05-03 14:59:36,435 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 59 [2021-05-03 14:59:37,170 WARN L205 SmtUtils]: Spent 520.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 63 [2021-05-03 14:59:38,552 WARN L205 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 156 DAG size of output: 131 [2021-05-03 14:59:39,919 WARN L205 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 105 DAG size of output: 88 [2021-05-03 14:59:41,306 WARN L205 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 123 DAG size of output: 97 [2021-05-03 14:59:42,877 WARN L205 SmtUtils]: Spent 1.44 s on a formula simplification. DAG size of input: 137 DAG size of output: 106 [2021-05-03 14:59:42,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:59:42,941 INFO L93 Difference]: Finished difference Result 485 states and 1326 transitions. [2021-05-03 14:59:42,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:59:42,943 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 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 20 [2021-05-03 14:59:42,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:59:42,944 INFO L225 Difference]: With dead ends: 485 [2021-05-03 14:59:42,944 INFO L226 Difference]: Without dead ends: 470 [2021-05-03 14:59:42,944 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 8818.7ms TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:59:42,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-05-03 14:59:42,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 335. [2021-05-03 14:59:42,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.8502994011976046) internal successors, (952), 334 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:59:42,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 952 transitions. [2021-05-03 14:59:42,947 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 952 transitions. Word has length 20 [2021-05-03 14:59:42,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:59:42,948 INFO L480 AbstractCegarLoop]: Abstraction has 335 states and 952 transitions. [2021-05-03 14:59:42,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:59:42,948 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 952 transitions. [2021-05-03 14:59:42,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:59:42,948 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:59:42,948 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:59:43,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2309,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:59:43,149 INFO L428 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:59:43,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:59:43,149 INFO L82 PathProgramCache]: Analyzing trace with hash -56135906, now seen corresponding path program 17 times [2021-05-03 14:59:43,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:59:43,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474040289] [2021-05-03 14:59:43,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:59:43,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:59:43,523 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-05-03 14:59:43,693 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-05-03 14:59:43,861 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-05-03 14:59:44,014 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:59:44,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474040289] [2021-05-03 14:59:44,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52239066] [2021-05-03 14:59:44,015 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:59:44,044 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:59:44,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:59:44,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:59:44,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:59:44,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-05-03 14:59:44,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:44,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 14:59:44,508 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:44,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-05-03 14:59:44,516 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:44,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 14:59:44,523 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:44,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 14:59:44,531 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:44,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-05-03 14:59:44,539 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:44,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 14:59:44,546 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:44,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 14:59:44,554 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:44,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 14:59:44,562 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:44,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-05-03 14:59:44,569 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:44,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-05-03 14:59:44,577 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:44,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-05-03 14:59:44,585 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:44,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 14:59:44,592 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:44,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:59:44,599 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:44,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-05-03 14:59:44,607 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:44,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:59:44,615 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:44,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 14:59:44,622 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:44,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 14:59:44,629 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:44,923 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-05-03 14:59:44,924 INFO L628 ElimStorePlain]: treesize reduction 103, result has 63.5 percent of original size [2021-05-03 14:59:44,926 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-05-03 14:59:44,926 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 1 variables, input treesize:751, output treesize:179 [2021-05-03 14:59:45,111 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-03 14:59:45,350 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-05-03 14:59:45,575 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-05-03 14:59:45,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:59:45,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:59:45,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 14:59:45,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17394635] [2021-05-03 14:59:45,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 14:59:45,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:59:45,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 14:59:45,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:59:45,728 INFO L87 Difference]: Start difference. First operand 335 states and 952 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:59:45,891 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-05-03 14:59:46,183 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-05-03 14:59:46,652 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-05-03 14:59:47,014 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2021-05-03 14:59:47,705 WARN L205 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 79 [2021-05-03 14:59:48,566 WARN L205 SmtUtils]: Spent 763.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 64 [2021-05-03 14:59:49,549 WARN L205 SmtUtils]: Spent 878.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 69 [2021-05-03 14:59:50,685 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 116 DAG size of output: 76 [2021-05-03 14:59:50,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:59:50,711 INFO L93 Difference]: Finished difference Result 462 states and 1281 transitions. [2021-05-03 14:59:50,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:59:50,712 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 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 20 [2021-05-03 14:59:50,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:59:50,713 INFO L225 Difference]: With dead ends: 462 [2021-05-03 14:59:50,713 INFO L226 Difference]: Without dead ends: 440 [2021-05-03 14:59:50,713 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 6142.7ms TimeCoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:59:50,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-05-03 14:59:50,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 329. [2021-05-03 14:59:50,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.8445121951219514) internal successors, (933), 328 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:59:50,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 933 transitions. [2021-05-03 14:59:50,717 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 933 transitions. Word has length 20 [2021-05-03 14:59:50,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:59:50,717 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 933 transitions. [2021-05-03 14:59:50,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:59:50,717 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 933 transitions. [2021-05-03 14:59:50,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:59:50,717 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:59:50,717 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:59:50,917 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2389 [2021-05-03 14:59:50,918 INFO L428 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:59:50,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:59:50,918 INFO L82 PathProgramCache]: Analyzing trace with hash -2117153012, now seen corresponding path program 18 times [2021-05-03 14:59:50,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:59:50,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319019598] [2021-05-03 14:59:50,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:59:50,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:59:51,452 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-05-03 14:59:51,652 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:59:51,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319019598] [2021-05-03 14:59:51,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172449712] [2021-05-03 14:59:51,653 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:59:51,675 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:59:51,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:59:51,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 14:59:51,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:59:52,141 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 55 [2021-05-03 14:59:52,415 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-03 14:59:52,620 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-05-03 14:59:52,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:52,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:59:52,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:53,916 WARN L205 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 136 DAG size of output: 128 [2021-05-03 14:59:53,917 INFO L628 ElimStorePlain]: treesize reduction 236, result has 67.7 percent of original size [2021-05-03 14:59:53,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:53,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:59:53,930 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:54,382 WARN L205 SmtUtils]: Spent 451.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-05-03 14:59:54,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:59:54,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:54,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:59:54,394 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:54,861 WARN L205 SmtUtils]: Spent 467.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-05-03 14:59:54,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:59:54,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:54,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:59:54,874 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:55,349 WARN L205 SmtUtils]: Spent 473.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-05-03 14:59:55,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:59:55,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:55,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:55,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:59:55,366 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:55,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:55,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:59:55,379 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:55,852 WARN L205 SmtUtils]: Spent 472.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-05-03 14:59:55,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:59:55,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:55,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:55,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:59:55,873 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:55,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:55,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:59:55,886 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:56,351 WARN L205 SmtUtils]: Spent 463.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-05-03 14:59:56,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:59:56,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:56,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:56,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:59:56,367 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:56,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:56,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:59:56,390 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:56,885 WARN L205 SmtUtils]: Spent 494.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-05-03 14:59:56,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:59:56,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:56,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:56,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 14:59:56,900 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:56,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:59:56,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 14:59:56,914 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 14:59:57,328 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-05-03 14:59:57,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:59:57,347 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: 10 dim-0 vars, and 12 xjuncts. [2021-05-03 14:59:57,348 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 16 variables, input treesize:737, output treesize:363 [2021-05-03 14:59:58,112 WARN L205 SmtUtils]: Spent 654.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 126 [2021-05-03 15:00:00,267 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_448, get_6, v_prenex_450, v_prenex_452, v_prenex_454, v_prenex_456], 1=[get_3, v_prenex_449, v_prenex_451, v_prenex_453, v_prenex_455, v_prenex_447]} [2021-05-03 15:00:00,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 15:00:00,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:00:00,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 15:00:00,295 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 15:00:00,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 15:00:00,309 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 15:00:00,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 15:00:00,323 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 15:00:00,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-05-03 15:00:00,340 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 15:00:00,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-05-03 15:00:00,355 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 15:00:01,646 WARN L205 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 164 DAG size of output: 99 [2021-05-03 15:00:01,647 INFO L628 ElimStorePlain]: treesize reduction 1546, result has 19.8 percent of original size [2021-05-03 15:00:01,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 15:00:01,660 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 15:00:02,138 WARN L205 SmtUtils]: Spent 477.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-05-03 15:00:02,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:00:02,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 15:00:02,156 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 15:00:02,661 WARN L205 SmtUtils]: Spent 504.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-05-03 15:00:02,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:00:02,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 15:00:02,675 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 15:00:03,095 WARN L205 SmtUtils]: Spent 418.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-05-03 15:00:03,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:00:03,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 15:00:03,105 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 15:00:03,531 WARN L205 SmtUtils]: Spent 425.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-05-03 15:00:03,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:00:03,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 15:00:03,545 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 15:00:03,987 WARN L205 SmtUtils]: Spent 442.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-05-03 15:00:03,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:00:03,988 INFO L518 ElimStorePlain]: Eliminatee get_3 vanished before elimination [2021-05-03 15:00:03,988 INFO L518 ElimStorePlain]: Eliminatee v_prenex_449 vanished before elimination [2021-05-03 15:00:03,988 INFO L518 ElimStorePlain]: Eliminatee v_prenex_451 vanished before elimination [2021-05-03 15:00:03,988 INFO L518 ElimStorePlain]: Eliminatee v_prenex_453 vanished before elimination [2021-05-03 15:00:03,988 INFO L518 ElimStorePlain]: Eliminatee v_prenex_455 vanished before elimination [2021-05-03 15:00:03,988 INFO L518 ElimStorePlain]: Eliminatee v_prenex_447 vanished before elimination [2021-05-03 15:00:03,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 16 xjuncts. [2021-05-03 15:00:03,997 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 18 variables, input treesize:2135, output treesize:283 [2021-05-03 15:00:04,447 WARN L205 SmtUtils]: Spent 381.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-05-03 15:00:04,824 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 15:00:05,076 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-03 15:00:05,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:00:05,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:00:05,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 15:00:05,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750151225] [2021-05-03 15:00:05,112 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 15:00:05,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:00:05,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 15:00:05,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:00:05,112 INFO L87 Difference]: Start difference. First operand 329 states and 933 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:00:05,344 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-05-03 15:00:05,834 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2021-05-03 15:00:06,615 WARN L205 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-05-03 15:00:07,440 WARN L205 SmtUtils]: Spent 618.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 85 [2021-05-03 15:00:09,388 WARN L205 SmtUtils]: Spent 1.75 s on a formula simplification. DAG size of input: 199 DAG size of output: 176 [2021-05-03 15:00:11,126 WARN L205 SmtUtils]: Spent 1.64 s on a formula simplification. DAG size of input: 117 DAG size of output: 102 [2021-05-03 15:00:13,357 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 133 DAG size of output: 110 [2021-05-03 15:00:15,818 WARN L205 SmtUtils]: Spent 2.25 s on a formula simplification. DAG size of input: 146 DAG size of output: 119 [2021-05-03 15:00:15,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:00:15,873 INFO L93 Difference]: Finished difference Result 480 states and 1318 transitions. [2021-05-03 15:00:15,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 15:00:15,875 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 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 20 [2021-05-03 15:00:15,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:00:15,875 INFO L225 Difference]: With dead ends: 480 [2021-05-03 15:00:15,875 INFO L226 Difference]: Without dead ends: 465 [2021-05-03 15:00:15,876 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 12881.4ms TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2021-05-03 15:00:15,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-05-03 15:00:15,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 335. [2021-05-03 15:00:15,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.8592814371257487) internal successors, (955), 334 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:00:15,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 955 transitions. [2021-05-03 15:00:15,879 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 955 transitions. Word has length 20 [2021-05-03 15:00:15,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:00:15,879 INFO L480 AbstractCegarLoop]: Abstraction has 335 states and 955 transitions. [2021-05-03 15:00:15,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:00:15,880 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 955 transitions. [2021-05-03 15:00:15,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 15:00:15,880 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:00:15,880 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:00:16,080 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2419,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:00:16,081 INFO L428 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:00:16,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:00:16,081 INFO L82 PathProgramCache]: Analyzing trace with hash 479093896, now seen corresponding path program 19 times [2021-05-03 15:00:16,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:00:16,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703494472] [2021-05-03 15:00:16,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:00:16,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:00:16,960 WARN L205 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-05-03 15:00:17,150 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-05-03 15:00:17,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:00:17,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703494472] [2021-05-03 15:00:17,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52664496] [2021-05-03 15:00:17,268 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:00:17,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:00:17,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 15:00:17,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:00:17,534 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-05-03 15:00:17,860 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 55 [2021-05-03 15:00:18,203 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-03 15:00:18,506 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-05-03 15:00:19,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:00:19,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:00:19,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:00:19,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:00:19,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:00:19,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:00:19,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:00:19,527 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 15:00:19,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:00:19,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 15:00:19,542 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 15:00:20,847 WARN L205 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 134 DAG size of output: 128 [2021-05-03 15:00:20,850 INFO L628 ElimStorePlain]: treesize reduction 192, result has 72.6 percent of original size [2021-05-03 15:00:20,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:00:20,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:00:20,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:00:20,866 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 15:00:20,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:00:20,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 15:00:20,880 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 15:00:21,501 WARN L205 SmtUtils]: Spent 620.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-05-03 15:00:21,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:00:21,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:00:21,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 15:00:21,517 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 15:00:22,221 WARN L205 SmtUtils]: Spent 703.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-05-03 15:00:22,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:00:22,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:00:22,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 15:00:22,239 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 15:00:22,946 WARN L205 SmtUtils]: Spent 705.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-05-03 15:00:22,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:00:22,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:00:22,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:00:22,962 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 15:00:23,674 WARN L205 SmtUtils]: Spent 711.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-05-03 15:00:23,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:00:23,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:00:23,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 15:00:23,693 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 15:00:24,332 WARN L205 SmtUtils]: Spent 639.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-05-03 15:00:24,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:00:24,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:00:24,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:00:24,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 15:00:24,349 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 15:00:24,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:00:24,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:00:24,362 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 15:00:24,959 WARN L205 SmtUtils]: Spent 595.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-05-03 15:00:24,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:00:24,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:00:24,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:00:24,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:00:24,975 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 15:00:24,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:00:24,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 15:00:24,987 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 15:00:25,674 WARN L205 SmtUtils]: Spent 685.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-05-03 15:00:25,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:00:25,696 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: 10 dim-0 vars, and 12 xjuncts. [2021-05-03 15:00:25,696 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 16 variables, input treesize:785, output treesize:399 [2021-05-03 15:00:26,759 WARN L205 SmtUtils]: Spent 923.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 128 [2021-05-03 15:00:27,592 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_503, v_prenex_505, v_prenex_491, v_prenex_483, v_prenex_495, v_prenex_485, v_prenex_497, v_prenex_487, v_prenex_499, v_prenex_511, v_prenex_501, v_prenex_479], 1=[v_prenex_504, v_prenex_490, v_prenex_482, v_prenex_494, v_prenex_484, v_prenex_496, v_prenex_486, v_prenex_498, v_prenex_510, v_prenex_500, v_prenex_478, v_prenex_502]} [2021-05-03 15:00:27,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:00:27,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:00:27,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:00:27,631 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 15:00:27,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 15:00:27,653 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 15:00:29,207 WARN L205 SmtUtils]: Spent 1.55 s on a formula simplification. DAG size of input: 232 DAG size of output: 106 [2021-05-03 15:00:29,208 INFO L628 ElimStorePlain]: treesize reduction 989, result has 28.2 percent of original size [2021-05-03 15:00:29,208 INFO L518 ElimStorePlain]: Eliminatee v_prenex_505 vanished before elimination [2021-05-03 15:00:29,208 INFO L518 ElimStorePlain]: Eliminatee v_prenex_491 vanished before elimination [2021-05-03 15:00:29,209 INFO L518 ElimStorePlain]: Eliminatee v_prenex_483 vanished before elimination [2021-05-03 15:00:29,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 15:00:29,222 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 15:00:29,738 WARN L205 SmtUtils]: Spent 515.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-05-03 15:00:29,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:00:29,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 15:00:29,762 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 15:00:30,362 WARN L205 SmtUtils]: Spent 600.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-05-03 15:00:30,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:00:30,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 15:00:30,389 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 15:00:30,938 WARN L205 SmtUtils]: Spent 548.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-05-03 15:00:30,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:00:30,939 INFO L518 ElimStorePlain]: Eliminatee v_prenex_487 vanished before elimination [2021-05-03 15:00:30,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 15:00:30,959 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 15:00:31,393 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-05-03 15:00:31,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:00:31,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 15:00:31,404 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 15:00:31,787 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-05-03 15:00:31,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:00:31,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 15:00:31,797 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 15:00:32,152 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-05-03 15:00:32,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:00:32,153 INFO L518 ElimStorePlain]: Eliminatee v_prenex_479 vanished before elimination [2021-05-03 15:00:32,153 INFO L518 ElimStorePlain]: Eliminatee v_prenex_504 vanished before elimination [2021-05-03 15:00:32,153 INFO L518 ElimStorePlain]: Eliminatee v_prenex_490 vanished before elimination [2021-05-03 15:00:32,153 INFO L518 ElimStorePlain]: Eliminatee v_prenex_482 vanished before elimination [2021-05-03 15:00:32,153 INFO L518 ElimStorePlain]: Eliminatee v_prenex_494 vanished before elimination [2021-05-03 15:00:32,153 INFO L518 ElimStorePlain]: Eliminatee v_prenex_484 vanished before elimination [2021-05-03 15:00:32,153 INFO L518 ElimStorePlain]: Eliminatee v_prenex_496 vanished before elimination [2021-05-03 15:00:32,153 INFO L518 ElimStorePlain]: Eliminatee v_prenex_486 vanished before elimination [2021-05-03 15:00:32,153 INFO L518 ElimStorePlain]: Eliminatee v_prenex_498 vanished before elimination [2021-05-03 15:00:32,153 INFO L518 ElimStorePlain]: Eliminatee v_prenex_510 vanished before elimination [2021-05-03 15:00:32,153 INFO L518 ElimStorePlain]: Eliminatee v_prenex_500 vanished before elimination [2021-05-03 15:00:32,154 INFO L518 ElimStorePlain]: Eliminatee v_prenex_478 vanished before elimination [2021-05-03 15:00:32,154 INFO L518 ElimStorePlain]: Eliminatee v_prenex_502 vanished before elimination [2021-05-03 15:00:32,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 24 dim-1 vars, End of recursive call: and 16 xjuncts. [2021-05-03 15:00:32,158 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 36 variables, input treesize:1407, output treesize:283 [2021-05-03 15:00:32,598 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-05-03 15:00:33,148 WARN L205 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-05-03 15:00:33,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:00:33,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:00:33,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 15:00:33,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201039442] [2021-05-03 15:00:33,377 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 15:00:33,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:00:33,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 15:00:33,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:00:33,377 INFO L87 Difference]: Start difference. First operand 335 states and 955 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:00:33,774 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 80 [2021-05-03 15:00:34,552 WARN L205 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 84 [2021-05-03 15:00:35,220 WARN L205 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 88 [2021-05-03 15:00:37,349 WARN L205 SmtUtils]: Spent 1.94 s on a formula simplification. DAG size of input: 177 DAG size of output: 175 [2021-05-03 15:00:39,221 WARN L205 SmtUtils]: Spent 1.75 s on a formula simplification. DAG size of input: 113 DAG size of output: 107 [2021-05-03 15:00:41,506 WARN L205 SmtUtils]: Spent 1.95 s on a formula simplification. DAG size of input: 129 DAG size of output: 115 [2021-05-03 15:00:43,670 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 142 DAG size of output: 124 [2021-05-03 15:00:43,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:00:43,716 INFO L93 Difference]: Finished difference Result 487 states and 1327 transitions. [2021-05-03 15:00:43,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 15:00:43,719 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 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 20 [2021-05-03 15:00:43,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:00:43,719 INFO L225 Difference]: With dead ends: 487 [2021-05-03 15:00:43,720 INFO L226 Difference]: Without dead ends: 465 [2021-05-03 15:00:43,720 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 13314.5ms TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2021-05-03 15:00:43,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-05-03 15:00:43,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 332. [2021-05-03 15:00:43,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.8519637462235647) internal successors, (944), 331 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:00:43,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 944 transitions. [2021-05-03 15:00:43,723 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 944 transitions. Word has length 20 [2021-05-03 15:00:43,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:00:43,724 INFO L480 AbstractCegarLoop]: Abstraction has 332 states and 944 transitions. [2021-05-03 15:00:43,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:00:43,724 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 944 transitions. [2021-05-03 15:00:43,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 15:00:43,724 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:00:43,724 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:00:43,925 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2643,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:00:43,925 INFO L428 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:00:43,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:00:43,925 INFO L82 PathProgramCache]: Analyzing trace with hash 305846204, now seen corresponding path program 20 times [2021-05-03 15:00:43,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:00:43,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679676875] [2021-05-03 15:00:43,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:00:43,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:00:44,219 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2021-05-03 15:00:44,418 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-05-03 15:00:44,628 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-05-03 15:00:44,994 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2021-05-03 15:00:45,169 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2021-05-03 15:00:45,318 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-05-03 15:00:45,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:00:45,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679676875] [2021-05-03 15:00:45,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138545166] [2021-05-03 15:00:45,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:00:45,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:00:45,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:00:45,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 15:00:45,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:00:45,727 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-05-03 15:00:46,307 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-03 15:00:46,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:00:46,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 15:00:46,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:00:47,444 WARN L205 SmtUtils]: Spent 845.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 96 [2021-05-03 15:00:47,445 INFO L628 ElimStorePlain]: treesize reduction 171, result has 67.2 percent of original size [2021-05-03 15:00:47,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:00:47,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:00:47,458 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 15:00:47,905 WARN L205 SmtUtils]: Spent 446.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-05-03 15:00:47,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:00:47,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:00:47,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:00:47,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 15:00:47,924 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 15:00:47,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:00:47,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:00:47,938 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 15:00:48,348 WARN L205 SmtUtils]: Spent 409.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-05-03 15:00:48,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:00:48,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:00:48,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:00:48,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 15:00:48,365 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 15:00:48,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:00:48,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:00:48,377 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 15:00:48,787 WARN L205 SmtUtils]: Spent 409.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-05-03 15:00:48,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:00:48,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:00:48,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 15:00:48,800 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 15:00:49,218 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-05-03 15:00:49,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:00:49,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:00:49,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:00:49,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 15:00:49,236 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 15:00:49,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:00:49,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:00:49,254 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 15:00:49,750 WARN L205 SmtUtils]: Spent 495.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-05-03 15:00:49,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:00:49,768 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-05-03 15:00:49,769 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:529, output treesize:241 [2021-05-03 15:00:50,434 WARN L205 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 88 [2021-05-03 15:00:51,040 WARN L205 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 69 [2021-05-03 15:00:51,688 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-05-03 15:00:51,880 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-05-03 15:00:51,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:00:51,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:00:51,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 15:00:51,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902047566] [2021-05-03 15:00:51,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 15:00:51,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:00:51,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 15:00:51,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:00:51,929 INFO L87 Difference]: Start difference. First operand 332 states and 944 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:00:52,143 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-05-03 15:00:52,758 WARN L205 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-05-03 15:00:53,943 WARN L205 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 66 [2021-05-03 15:00:55,014 WARN L205 SmtUtils]: Spent 751.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 70 [2021-05-03 15:00:57,527 WARN L205 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 176 DAG size of output: 141 [2021-05-03 15:01:00,685 WARN L205 SmtUtils]: Spent 2.79 s on a formula simplification. DAG size of input: 197 DAG size of output: 146 [2021-05-03 15:01:01,893 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 163 DAG size of output: 95 [2021-05-03 15:01:03,050 WARN L205 SmtUtils]: Spent 964.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 87 [2021-05-03 15:01:04,282 WARN L205 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 163 DAG size of output: 95 [2021-05-03 15:01:05,966 WARN L205 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 123 DAG size of output: 96 [2021-05-03 15:01:06,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:01:06,138 INFO L93 Difference]: Finished difference Result 495 states and 1357 transitions. [2021-05-03 15:01:06,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 15:01:06,141 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 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 20 [2021-05-03 15:01:06,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:01:06,141 INFO L225 Difference]: With dead ends: 495 [2021-05-03 15:01:06,141 INFO L226 Difference]: Without dead ends: 425 [2021-05-03 15:01:06,142 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 16089.0ms TimeCoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2021-05-03 15:01:06,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-05-03 15:01:06,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 332. [2021-05-03 15:01:06,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.8338368580060425) internal successors, (938), 331 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:01:06,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 938 transitions. [2021-05-03 15:01:06,145 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 938 transitions. Word has length 20 [2021-05-03 15:01:06,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:01:06,145 INFO L480 AbstractCegarLoop]: Abstraction has 332 states and 938 transitions. [2021-05-03 15:01:06,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:01:06,145 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 938 transitions. [2021-05-03 15:01:06,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 15:01:06,146 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:01:06,146 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:01:06,346 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2760 [2021-05-03 15:01:06,347 INFO L428 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:01:06,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:01:06,347 INFO L82 PathProgramCache]: Analyzing trace with hash -361470104, now seen corresponding path program 21 times [2021-05-03 15:01:06,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:01:06,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053330571] [2021-05-03 15:01:06,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:01:06,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:01:06,533 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-05-03 15:01:06,714 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-05-03 15:01:07,234 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-05-03 15:01:07,436 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 30 [2021-05-03 15:01:07,704 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 37 [2021-05-03 15:01:07,892 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 23 [2021-05-03 15:01:07,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:01:07,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053330571] [2021-05-03 15:01:07,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66727728] [2021-05-03 15:01:07,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:01:07,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 15:01:07,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:01:07,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 15:01:08,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:01:08,294 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-05-03 15:01:08,593 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 15:01:09,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:01:09,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:01:09,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 15:01:09,123 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:01:09,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:01:09,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:01:09,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-05-03 15:01:09,143 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 15:01:09,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:01:09,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 15:01:09,154 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 15:01:09,950 WARN L205 SmtUtils]: Spent 795.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 88 [2021-05-03 15:01:09,951 INFO L628 ElimStorePlain]: treesize reduction 100, result has 73.0 percent of original size [2021-05-03 15:01:09,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:01:09,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:01:09,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:01:09,970 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 15:01:09,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:01:09,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 15:01:09,984 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 15:01:10,379 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-05-03 15:01:10,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:01:10,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:01:10,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 15:01:10,393 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 15:01:10,735 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-05-03 15:01:10,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:01:10,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:01:10,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 15:01:10,750 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 15:01:11,030 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-05-03 15:01:11,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:01:11,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:01:11,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:01:11,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:01:11,044 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 15:01:11,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:01:11,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 15:01:11,055 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 15:01:11,297 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-05-03 15:01:11,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:01:11,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:01:11,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:01:11,310 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 15:01:11,584 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-05-03 15:01:11,585 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:01:11,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-05-03 15:01:11,598 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:469, output treesize:196 [2021-05-03 15:01:12,034 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 84 [2021-05-03 15:01:12,484 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 65 [2021-05-03 15:01:12,854 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-05-03 15:01:13,495 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-03 15:01:13,771 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2021-05-03 15:01:13,796 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:01:13,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:01:13,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 15:01:13,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255124818] [2021-05-03 15:01:13,796 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 15:01:13,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:01:13,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 15:01:13,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:01:13,797 INFO L87 Difference]: Start difference. First operand 332 states and 938 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:01:14,028 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-05-03 15:01:14,442 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2021-05-03 15:01:15,239 WARN L205 SmtUtils]: Spent 590.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 65 [2021-05-03 15:01:16,214 WARN L205 SmtUtils]: Spent 737.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 117 [2021-05-03 15:01:18,228 WARN L205 SmtUtils]: Spent 1.78 s on a formula simplification. DAG size of input: 161 DAG size of output: 124 [2021-05-03 15:01:20,498 WARN L205 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 176 DAG size of output: 133 [2021-05-03 15:01:23,350 WARN L205 SmtUtils]: Spent 2.59 s on a formula simplification. DAG size of input: 181 DAG size of output: 140 [2021-05-03 15:01:26,591 WARN L205 SmtUtils]: Spent 3.04 s on a formula simplification. DAG size of input: 193 DAG size of output: 147 [2021-05-03 15:01:26,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:01:26,650 INFO L93 Difference]: Finished difference Result 574 states and 1573 transitions. [2021-05-03 15:01:26,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 15:01:26,652 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 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 20 [2021-05-03 15:01:26,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:01:26,653 INFO L225 Difference]: With dead ends: 574 [2021-05-03 15:01:26,653 INFO L226 Difference]: Without dead ends: 534 [2021-05-03 15:01:26,653 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 15303.6ms TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-05-03 15:01:26,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-05-03 15:01:26,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 344. [2021-05-03 15:01:26,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 2.8338192419825075) internal successors, (972), 343 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:01:26,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 972 transitions. [2021-05-03 15:01:26,657 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 972 transitions. Word has length 20 [2021-05-03 15:01:26,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:01:26,657 INFO L480 AbstractCegarLoop]: Abstraction has 344 states and 972 transitions. [2021-05-03 15:01:26,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:01:26,658 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 972 transitions. [2021-05-03 15:01:26,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 15:01:26,658 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:01:26,658 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:01:26,858 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2820,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:01:26,859 INFO L428 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:01:26,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:01:26,859 INFO L82 PathProgramCache]: Analyzing trace with hash -758387758, now seen corresponding path program 22 times [2021-05-03 15:01:26,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:01:26,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472873615] [2021-05-03 15:01:26,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:01:26,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:01:27,290 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-05-03 15:01:27,433 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-03 15:01:27,570 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 15:01:27,722 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-05-03 15:01:27,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:01:27,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472873615] [2021-05-03 15:01:27,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229142998] [2021-05-03 15:01:27,828 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:01:27,849 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:01:27,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:01:27,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 15:01:27,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:01:28,103 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-05-03 15:01:28,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:01:28,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:01:28,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 15:01:28,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:01:28,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:01:28,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:01:28,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:01:28,980 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 15:01:28,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:01:28,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:01:29,003 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 15:01:29,803 WARN L205 SmtUtils]: Spent 799.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 90 [2021-05-03 15:01:29,804 INFO L628 ElimStorePlain]: treesize reduction 108, result has 72.6 percent of original size [2021-05-03 15:01:29,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:01:29,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:01:29,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 15:01:29,819 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 15:01:29,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:01:29,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:01:29,832 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 15:01:30,150 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-05-03 15:01:30,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:01:30,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:01:30,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 15:01:30,165 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 15:01:30,469 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-05-03 15:01:30,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:01:30,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:01:30,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 15:01:30,483 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 15:01:30,803 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-05-03 15:01:30,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:01:30,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:01:30,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:01:30,827 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 15:01:31,216 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-05-03 15:01:31,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:01:31,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:01:31,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:01:31,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:01:31,232 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 15:01:31,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:01:31,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 15:01:31,245 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 15:01:31,530 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-05-03 15:01:31,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:01:31,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-05-03 15:01:31,549 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:469, output treesize:196 [2021-05-03 15:01:32,078 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 84 [2021-05-03 15:01:32,653 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-05-03 15:01:33,680 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-05-03 15:01:34,107 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-05-03 15:01:34,305 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-05-03 15:01:34,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:01:34,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:01:34,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 15:01:34,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014703766] [2021-05-03 15:01:34,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 15:01:34,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:01:34,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 15:01:34,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:01:34,359 INFO L87 Difference]: Start difference. First operand 344 states and 972 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:01:34,722 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-05-03 15:01:35,323 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-05-03 15:01:36,276 WARN L205 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2021-05-03 15:01:37,939 WARN L205 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 131 DAG size of output: 117 [2021-05-03 15:01:40,946 WARN L205 SmtUtils]: Spent 2.66 s on a formula simplification. DAG size of input: 150 DAG size of output: 121 [2021-05-03 15:01:43,680 WARN L205 SmtUtils]: Spent 2.45 s on a formula simplification. DAG size of input: 156 DAG size of output: 132 [2021-05-03 15:01:45,625 WARN L205 SmtUtils]: Spent 1.60 s on a formula simplification. DAG size of input: 169 DAG size of output: 137 [2021-05-03 15:01:47,867 WARN L205 SmtUtils]: Spent 1.97 s on a formula simplification. DAG size of input: 183 DAG size of output: 146 [2021-05-03 15:01:47,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:01:47,977 INFO L93 Difference]: Finished difference Result 592 states and 1612 transitions. [2021-05-03 15:01:47,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 15:01:47,980 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 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 20 [2021-05-03 15:01:47,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:01:47,981 INFO L225 Difference]: With dead ends: 592 [2021-05-03 15:01:47,981 INFO L226 Difference]: Without dead ends: 577 [2021-05-03 15:01:47,981 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 15114.3ms TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-05-03 15:01:47,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-05-03 15:01:47,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 350. [2021-05-03 15:01:47,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 2.848137535816619) internal successors, (994), 349 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:01:47,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 994 transitions. [2021-05-03 15:01:47,986 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 994 transitions. Word has length 20 [2021-05-03 15:01:47,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:01:47,986 INFO L480 AbstractCegarLoop]: Abstraction has 350 states and 994 transitions. [2021-05-03 15:01:47,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:01:47,986 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 994 transitions. [2021-05-03 15:01:47,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 15:01:47,987 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:01:47,987 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:01:48,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2897 [2021-05-03 15:01:48,187 INFO L428 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:01:48,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:01:48,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1837859150, now seen corresponding path program 23 times [2021-05-03 15:01:48,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:01:48,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588184724] [2021-05-03 15:01:48,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:01:48,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:01:48,582 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-05-03 15:01:48,876 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-05-03 15:01:49,137 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-05-03 15:01:49,306 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-05-03 15:01:49,451 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:01:49,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588184724] [2021-05-03 15:01:49,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254566083] [2021-05-03 15:01:49,451 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:01:49,473 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:01:49,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:01:49,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 15:01:49,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:01:50,027 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-05-03 15:01:50,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-05-03 15:01:50,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:01:50,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 15:01:50,144 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 15:01:50,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-05-03 15:01:50,156 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 15:01:50,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-05-03 15:01:50,167 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 15:01:50,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-05-03 15:01:50,177 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 15:01:50,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-05-03 15:01:50,187 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 15:01:50,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-05-03 15:01:50,199 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 15:01:50,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:01:50,209 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 15:01:50,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 15:01:50,220 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 15:01:50,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 15:01:50,231 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 15:01:50,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-05-03 15:01:50,242 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 15:01:50,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 15:01:50,253 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 15:01:50,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 15:01:50,263 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 15:01:50,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 15:01:50,276 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 15:01:50,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 15:01:50,287 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 15:01:50,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 15:01:50,299 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 15:01:50,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 15:01:50,311 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-05-03 15:01:50,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:01:50,324 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-05-03 15:01:50,823 WARN L205 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-05-03 15:01:50,824 INFO L628 ElimStorePlain]: treesize reduction 109, result has 62.2 percent of original size [2021-05-03 15:01:50,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-05-03 15:01:50,827 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 1 variables, input treesize:751, output treesize:179 [2021-05-03 15:01:51,138 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-05-03 15:01:51,432 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 15:01:51,820 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-05-03 15:01:52,387 WARN L205 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-05-03 15:01:52,745 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-05-03 15:01:52,791 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:01:52,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:01:52,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 15:01:52,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394194495] [2021-05-03 15:01:52,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 15:01:52,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:01:52,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 15:01:52,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-05-03 15:01:52,792 INFO L87 Difference]: Start difference. First operand 350 states and 994 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:01:53,060 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-05-03 15:01:53,532 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-05-03 15:01:54,175 WARN L205 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-05-03 15:01:55,343 WARN L205 SmtUtils]: Spent 900.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2021-05-03 15:01:55,922 WARN L205 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2021-05-03 15:01:57,017 WARN L205 SmtUtils]: Spent 931.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 70 [2021-05-03 15:01:58,488 WARN L205 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 100 DAG size of output: 84 [2021-05-03 15:02:00,276 WARN L205 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 120 DAG size of output: 94 [2021-05-03 15:02:02,111 WARN L205 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 132 DAG size of output: 104 [2021-05-03 15:02:02,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:02:02,152 INFO L93 Difference]: Finished difference Result 599 states and 1621 transitions. [2021-05-03 15:02:02,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 15:02:02,155 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 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 20 [2021-05-03 15:02:02,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:02:02,156 INFO L225 Difference]: With dead ends: 599 [2021-05-03 15:02:02,156 INFO L226 Difference]: Without dead ends: 577 [2021-05-03 15:02:02,156 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 11471.5ms TimeCoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2021-05-03 15:02:02,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-05-03 15:02:02,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 347. [2021-05-03 15:02:02,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.841040462427746) internal successors, (983), 346 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:02:02,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 983 transitions. [2021-05-03 15:02:02,160 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 983 transitions. Word has length 20 [2021-05-03 15:02:02,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:02:02,160 INFO L480 AbstractCegarLoop]: Abstraction has 347 states and 983 transitions. [2021-05-03 15:02:02,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:02:02,161 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 983 transitions. [2021-05-03 15:02:02,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 15:02:02,161 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:02:02,161 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:02:02,361 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2994 [2021-05-03 15:02:02,361 INFO L428 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:02:02,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:02:02,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1664611458, now seen corresponding path program 24 times [2021-05-03 15:02:02,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:02:02,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765513059] [2021-05-03 15:02:02,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:02:02,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:02:03,022 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 15:02:03,376 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-05-03 15:02:03,690 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 42 [2021-05-03 15:02:03,889 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-05-03 15:02:04,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:02:04,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765513059] [2021-05-03 15:02:04,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400631486] [2021-05-03 15:02:04,026 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:02:04,048 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 15:02:04,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:02:04,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 15:02:04,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:02:04,352 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-05-03 15:02:05,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:02:05,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:02:05,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:02:06,226 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 98 DAG size of output: 92 [2021-05-03 15:02:06,227 INFO L628 ElimStorePlain]: treesize reduction 156, result has 66.2 percent of original size [2021-05-03 15:02:06,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:02:06,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:02:06,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 15:02:06,245 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 15:02:06,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:02:06,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:02:06,261 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 15:02:06,653 WARN L205 SmtUtils]: Spent 391.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-05-03 15:02:06,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:02:06,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:02:06,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:02:06,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:02:06,669 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 15:02:06,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:02:06,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 15:02:06,682 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 15:02:07,114 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-05-03 15:02:07,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:02:07,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:02:07,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:02:07,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 15:02:07,136 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 15:02:07,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:02:07,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:02:07,151 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 15:02:07,514 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-05-03 15:02:07,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:02:07,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:02:07,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 15:02:07,529 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 15:02:07,865 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-05-03 15:02:07,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:02:07,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:02:07,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 15:02:07,880 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 15:02:08,223 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-05-03 15:02:08,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:02:08,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-05-03 15:02:08,244 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:469, output treesize:196 [2021-05-03 15:02:08,790 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 84 [2021-05-03 15:02:09,320 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-05-03 15:02:09,949 WARN L205 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 69 [2021-05-03 15:02:10,691 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-05-03 15:02:10,886 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-05-03 15:02:10,936 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:02:10,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:02:10,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 15:02:10,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946302998] [2021-05-03 15:02:10,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 15:02:10,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:02:10,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 15:02:10,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:02:10,937 INFO L87 Difference]: Start difference. First operand 347 states and 983 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:02:11,761 WARN L205 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-05-03 15:02:12,165 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-05-03 15:02:12,599 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-05-03 15:02:12,893 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-03 15:02:13,548 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-05-03 15:02:14,281 WARN L205 SmtUtils]: Spent 623.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2021-05-03 15:02:15,826 WARN L205 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 118 DAG size of output: 116 [2021-05-03 15:02:16,932 WARN L205 SmtUtils]: Spent 902.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2021-05-03 15:02:17,590 WARN L205 SmtUtils]: Spent 515.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-05-03 15:02:18,014 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-05-03 15:02:18,755 WARN L205 SmtUtils]: Spent 668.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 15:02:19,206 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-05-03 15:02:19,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:02:19,287 INFO L93 Difference]: Finished difference Result 706 states and 1912 transitions. [2021-05-03 15:02:19,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 15:02:19,290 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 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 20 [2021-05-03 15:02:19,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:02:19,291 INFO L225 Difference]: With dead ends: 706 [2021-05-03 15:02:19,291 INFO L226 Difference]: Without dead ends: 662 [2021-05-03 15:02:19,291 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 11250.4ms TimeCoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2021-05-03 15:02:19,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-05-03 15:02:19,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 354. [2021-05-03 15:02:19,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.858356940509915) internal successors, (1009), 353 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:02:19,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1009 transitions. [2021-05-03 15:02:19,296 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1009 transitions. Word has length 20 [2021-05-03 15:02:19,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:02:19,296 INFO L480 AbstractCegarLoop]: Abstraction has 354 states and 1009 transitions. [2021-05-03 15:02:19,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:02:19,296 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1009 transitions. [2021-05-03 15:02:19,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 15:02:19,297 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:02:19,297 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:02:19,497 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3027,226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:02:19,497 INFO L428 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:02:19,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:02:19,498 INFO L82 PathProgramCache]: Analyzing trace with hash -678810648, now seen corresponding path program 25 times [2021-05-03 15:02:19,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:02:19,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941344521] [2021-05-03 15:02:19,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:02:19,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:02:19,823 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-05-03 15:02:20,016 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-05-03 15:02:20,382 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-05-03 15:02:20,735 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-05-03 15:02:20,885 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 16 [2021-05-03 15:02:20,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:02:20,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941344521] [2021-05-03 15:02:20,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813720838] [2021-05-03 15:02:20,888 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:02:20,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:02:20,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 15:02:20,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:02:21,239 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-05-03 15:02:22,070 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 59 [2021-05-03 15:02:22,501 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-05-03 15:02:24,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:02:24,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:02:24,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:02:24,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:02:24,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:02:24,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:02:24,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:02:24,091 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 15:02:24,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:02:24,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 15:02:24,109 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 15:02:25,814 WARN L205 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 134 DAG size of output: 128 [2021-05-03 15:02:25,815 INFO L628 ElimStorePlain]: treesize reduction 190, result has 72.9 percent of original size [2021-05-03 15:02:25,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:02:25,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:02:25,832 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 15:02:26,614 WARN L205 SmtUtils]: Spent 781.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-05-03 15:02:26,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:02:26,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:02:26,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 15:02:26,631 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 15:02:27,498 WARN L205 SmtUtils]: Spent 865.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-05-03 15:02:27,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:02:27,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:02:27,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 15:02:27,520 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 15:02:28,396 WARN L205 SmtUtils]: Spent 875.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-05-03 15:02:28,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:02:28,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:02:28,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 15:02:28,422 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 15:02:29,211 WARN L205 SmtUtils]: Spent 788.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-05-03 15:02:29,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:02:29,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:02:29,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:02:29,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:02:29,232 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 15:02:29,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:02:29,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 15:02:29,248 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 15:02:30,058 WARN L205 SmtUtils]: Spent 809.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-05-03 15:02:30,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:02:30,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:02:30,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:02:30,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:02:30,078 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 15:02:30,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:02:30,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 15:02:30,095 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 15:02:30,841 WARN L205 SmtUtils]: Spent 745.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-05-03 15:02:30,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:02:30,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:02:30,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:02:30,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 15:02:30,858 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 15:02:30,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:02:30,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:02:30,871 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 15:02:31,485 WARN L205 SmtUtils]: Spent 613.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-05-03 15:02:31,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:02:31,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: 10 dim-0 vars, and 12 xjuncts. [2021-05-03 15:02:31,512 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 16 variables, input treesize:785, output treesize:399 [2021-05-03 15:02:32,688 WARN L205 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 128 DAG size of output: 128 [2021-05-03 15:02:33,676 WARN L205 SmtUtils]: Spent 750.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 107 [2021-05-03 15:02:34,725 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_613, v_prenex_615, v_prenex_617, get_6, v_prenex_609, v_prenex_611], 1=[v_prenex_614, v_prenex_616, v_prenex_618, get_0, v_prenex_610, v_prenex_612]} [2021-05-03 15:02:34,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-05-03 15:02:34,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:02:34,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:02:34,761 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 15:02:34,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-05-03 15:02:34,783 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 15:02:34,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 15:02:34,806 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 15:02:34,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:02:34,827 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 15:02:34,842 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 15:02:34,846 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 15:02:36,327 WARN L205 SmtUtils]: Spent 1.48 s on a formula simplification. DAG size of input: 162 DAG size of output: 95 [2021-05-03 15:02:36,328 INFO L628 ElimStorePlain]: treesize reduction 1556, result has 15.4 percent of original size [2021-05-03 15:02:36,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 15:02:36,341 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 15:02:36,761 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-05-03 15:02:36,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:02:36,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 15:02:36,777 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 15:02:37,268 WARN L205 SmtUtils]: Spent 490.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-05-03 15:02:37,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:02:37,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 15:02:37,286 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 15:02:37,751 WARN L205 SmtUtils]: Spent 464.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-05-03 15:02:37,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:02:37,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 15:02:37,767 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 15:02:38,210 WARN L205 SmtUtils]: Spent 442.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-05-03 15:02:38,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:02:38,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 15:02:38,227 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 15:02:38,669 WARN L205 SmtUtils]: Spent 441.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-05-03 15:02:38,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:02:38,670 INFO L518 ElimStorePlain]: Eliminatee v_prenex_614 vanished before elimination [2021-05-03 15:02:38,670 INFO L518 ElimStorePlain]: Eliminatee v_prenex_616 vanished before elimination [2021-05-03 15:02:38,670 INFO L518 ElimStorePlain]: Eliminatee v_prenex_618 vanished before elimination [2021-05-03 15:02:38,670 INFO L518 ElimStorePlain]: Eliminatee get_0 vanished before elimination [2021-05-03 15:02:38,670 INFO L518 ElimStorePlain]: Eliminatee v_prenex_610 vanished before elimination [2021-05-03 15:02:38,670 INFO L518 ElimStorePlain]: Eliminatee v_prenex_612 vanished before elimination [2021-05-03 15:02:38,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 12 xjuncts. [2021-05-03 15:02:38,675 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 18 variables, input treesize:1953, output treesize:187 [2021-05-03 15:02:39,080 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 15:02:39,380 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-03 15:02:39,424 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:02:39,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:02:39,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 15:02:39,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737683084] [2021-05-03 15:02:39,425 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 15:02:39,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:02:39,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 15:02:39,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:02:39,425 INFO L87 Difference]: Start difference. First operand 354 states and 1009 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:02:40,241 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2021-05-03 15:02:41,107 WARN L205 SmtUtils]: Spent 598.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 82 [2021-05-03 15:02:43,191 WARN L205 SmtUtils]: Spent 1.94 s on a formula simplification. DAG size of input: 171 DAG size of output: 169 [2021-05-03 15:02:48,865 WARN L205 SmtUtils]: Spent 5.34 s on a formula simplification. DAG size of input: 196 DAG size of output: 177 [2021-05-03 15:02:49,760 WARN L205 SmtUtils]: Spent 490.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-05-03 15:02:51,143 WARN L205 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2021-05-03 15:02:51,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:02:51,205 INFO L93 Difference]: Finished difference Result 508 states and 1425 transitions. [2021-05-03 15:02:51,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 15:02:51,209 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 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 20 [2021-05-03 15:02:51,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:02:51,210 INFO L225 Difference]: With dead ends: 508 [2021-05-03 15:02:51,210 INFO L226 Difference]: Without dead ends: 493 [2021-05-03 15:02:51,210 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 15523.8ms TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2021-05-03 15:02:51,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-05-03 15:02:51,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 360. [2021-05-03 15:02:51,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 2.8551532033426184) internal successors, (1025), 359 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:02:51,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1025 transitions. [2021-05-03 15:02:51,214 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1025 transitions. Word has length 20 [2021-05-03 15:02:51,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:02:51,214 INFO L480 AbstractCegarLoop]: Abstraction has 360 states and 1025 transitions. [2021-05-03 15:02:51,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:02:51,214 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1025 transitions. [2021-05-03 15:02:51,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 15:02:51,215 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:02:51,215 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:02:51,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3087 [2021-05-03 15:02:51,415 INFO L428 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:02:51,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:02:51,416 INFO L82 PathProgramCache]: Analyzing trace with hash -199525972, now seen corresponding path program 26 times [2021-05-03 15:02:51,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:02:51,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576632753] [2021-05-03 15:02:51,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:02:51,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:02:52,161 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2021-05-03 15:02:52,498 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 34 [2021-05-03 15:02:52,764 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2021-05-03 15:02:52,937 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 14 [2021-05-03 15:02:52,941 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:02:52,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576632753] [2021-05-03 15:02:52,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479518936] [2021-05-03 15:02:52,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:02:52,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:02:52,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:02:52,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 15:02:52,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:02:53,348 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-05-03 15:02:53,699 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 15:02:54,271 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-03 15:02:54,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:02:54,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:02:54,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:02:54,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:02:54,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:02:54,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:02:54,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:02:54,682 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 15:02:54,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:02:54,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 15:02:54,700 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 15:02:55,842 WARN L205 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 102 DAG size of output: 96 [2021-05-03 15:02:55,844 INFO L628 ElimStorePlain]: treesize reduction 156, result has 68.8 percent of original size [2021-05-03 15:02:55,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:02:55,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:02:55,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 15:02:55,860 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 15:02:55,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:02:55,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:02:55,875 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 15:02:56,485 WARN L205 SmtUtils]: Spent 608.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-05-03 15:02:56,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:02:56,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:02:56,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:02:56,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:02:56,507 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 15:02:56,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:02:56,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 15:02:56,524 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 15:02:57,063 WARN L205 SmtUtils]: Spent 538.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-05-03 15:02:57,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:02:57,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:02:57,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 15:02:57,081 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 15:02:57,609 WARN L205 SmtUtils]: Spent 527.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-05-03 15:02:57,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:02:57,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:02:57,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 15:02:57,627 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 15:02:58,111 WARN L205 SmtUtils]: Spent 482.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-05-03 15:02:58,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:02:58,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:02:58,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:02:58,128 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 15:02:58,586 WARN L205 SmtUtils]: Spent 458.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-05-03 15:02:58,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:02:58,605 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-05-03 15:02:58,605 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:529, output treesize:241 [2021-05-03 15:02:59,536 WARN L205 SmtUtils]: Spent 806.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 88 [2021-05-03 15:03:00,612 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-05-03 15:03:00,885 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-03 15:03:01,249 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2021-05-03 15:03:01,295 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:01,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:03:01,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 15:03:01,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632586984] [2021-05-03 15:03:01,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 15:03:01,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:03:01,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 15:03:01,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:03:01,296 INFO L87 Difference]: Start difference. First operand 360 states and 1025 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:03:02,071 WARN L205 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-05-03 15:03:02,504 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-05-03 15:03:03,168 WARN L205 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2021-05-03 15:03:03,546 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-05-03 15:03:04,938 WARN L205 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 114 DAG size of output: 111 [2021-05-03 15:03:05,555 WARN L205 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-05-03 15:03:06,081 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-05-03 15:03:06,420 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-03 15:03:07,391 WARN L205 SmtUtils]: Spent 906.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2021-05-03 15:03:08,137 WARN L205 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-05-03 15:03:09,360 WARN L205 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2021-05-03 15:03:10,187 WARN L205 SmtUtils]: Spent 696.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-05-03 15:03:10,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:03:10,250 INFO L93 Difference]: Finished difference Result 650 states and 1751 transitions. [2021-05-03 15:03:10,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 15:03:10,252 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 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 20 [2021-05-03 15:03:10,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:03:10,253 INFO L225 Difference]: With dead ends: 650 [2021-05-03 15:03:10,253 INFO L226 Difference]: Without dead ends: 620 [2021-05-03 15:03:10,253 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 11756.9ms TimeCoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2021-05-03 15:03:10,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2021-05-03 15:03:10,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 369. [2021-05-03 15:03:10,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 2.8668478260869565) internal successors, (1055), 368 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:03:10,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1055 transitions. [2021-05-03 15:03:10,258 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1055 transitions. Word has length 20 [2021-05-03 15:03:10,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:03:10,258 INFO L480 AbstractCegarLoop]: Abstraction has 369 states and 1055 transitions. [2021-05-03 15:03:10,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:03:10,258 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1055 transitions. [2021-05-03 15:03:10,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 15:03:10,259 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:03:10,259 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:03:10,459 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3230 [2021-05-03 15:03:10,459 INFO L428 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:03:10,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:03:10,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1898246360, now seen corresponding path program 27 times [2021-05-03 15:03:10,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:03:10,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066250403] [2021-05-03 15:03:10,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:03:10,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:03:10,716 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-05-03 15:03:10,913 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2021-05-03 15:03:11,093 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-05-03 15:03:11,317 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2021-05-03 15:03:11,533 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-03 15:03:11,922 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-05-03 15:03:12,155 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-05-03 15:03:12,334 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2021-05-03 15:03:12,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:12,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066250403] [2021-05-03 15:03:12,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793087996] [2021-05-03 15:03:12,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:03:12,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 15:03:12,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:03:12,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:03:12,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:03:12,561 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-03 15:03:12,747 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-05-03 15:03:13,087 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-05-03 15:03:13,312 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 15:03:13,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 15:03:13,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:13,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:03:13,473 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:13,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:03:13,487 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:13,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-05-03 15:03:13,502 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:13,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 15:03:13,517 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:13,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-05-03 15:03:13,533 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:13,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-05-03 15:03:13,548 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:13,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:03:13,569 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:13,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 15:03:13,583 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:13,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-05-03 15:03:13,597 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:13,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-05-03 15:03:13,611 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:13,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-05-03 15:03:13,626 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:13,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 15:03:13,641 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:13,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-05-03 15:03:13,655 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:13,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 15:03:13,670 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:13,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-05-03 15:03:13,684 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:13,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 15:03:13,701 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:13,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 15:03:13,715 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:13,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:03:13,729 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:13,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 15:03:13,744 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:13,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 15:03:13,762 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:13,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-05-03 15:03:13,778 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:13,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 15:03:13,795 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:13,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-05-03 15:03:13,814 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:15,058 WARN L205 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-05-03 15:03:15,059 INFO L628 ElimStorePlain]: treesize reduction 224, result has 61.7 percent of original size [2021-05-03 15:03:15,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 12 xjuncts. [2021-05-03 15:03:15,063 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 1 variables, input treesize:1201, output treesize:361 [2021-05-03 15:03:15,778 WARN L205 SmtUtils]: Spent 617.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-03 15:03:16,503 WARN L205 SmtUtils]: Spent 540.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 15:03:17,107 WARN L205 SmtUtils]: Spent 450.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 15:03:17,701 WARN L205 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-05-03 15:03:17,759 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:17,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:03:17,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 15:03:17,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338182989] [2021-05-03 15:03:17,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 15:03:17,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:03:17,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 15:03:17,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:03:17,760 INFO L87 Difference]: Start difference. First operand 369 states and 1055 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:03:18,746 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 15:03:19,621 WARN L205 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-05-03 15:03:21,153 WARN L205 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-05-03 15:03:22,797 WARN L205 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 84 DAG size of output: 73 [2021-05-03 15:03:25,658 WARN L205 SmtUtils]: Spent 2.69 s on a formula simplification. DAG size of input: 103 DAG size of output: 82 [2021-05-03 15:03:26,418 WARN L205 SmtUtils]: Spent 652.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 36 [2021-05-03 15:03:29,922 WARN L205 SmtUtils]: Spent 3.37 s on a formula simplification. DAG size of input: 116 DAG size of output: 93 [2021-05-03 15:03:30,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:03:30,052 INFO L93 Difference]: Finished difference Result 555 states and 1533 transitions. [2021-05-03 15:03:30,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 15:03:30,055 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 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 20 [2021-05-03 15:03:30,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:03:30,056 INFO L225 Difference]: With dead ends: 555 [2021-05-03 15:03:30,056 INFO L226 Difference]: Without dead ends: 484 [2021-05-03 15:03:30,056 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 15651.5ms TimeCoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2021-05-03 15:03:30,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-05-03 15:03:30,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 363. [2021-05-03 15:03:30,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 2.8535911602209945) internal successors, (1033), 362 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:03:30,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 1033 transitions. [2021-05-03 15:03:30,060 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 1033 transitions. Word has length 20 [2021-05-03 15:03:30,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:03:30,060 INFO L480 AbstractCegarLoop]: Abstraction has 363 states and 1033 transitions. [2021-05-03 15:03:30,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:03:30,060 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 1033 transitions. [2021-05-03 15:03:30,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 15:03:30,061 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:03:30,061 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:03:30,261 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3325,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:03:30,261 INFO L428 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:03:30,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:03:30,261 INFO L82 PathProgramCache]: Analyzing trace with hash 335703830, now seen corresponding path program 28 times [2021-05-03 15:03:30,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:03:30,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334091797] [2021-05-03 15:03:30,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:03:30,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:03:30,661 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-05-03 15:03:30,861 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-05-03 15:03:31,230 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2021-05-03 15:03:31,599 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-05-03 15:03:31,753 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-05-03 15:03:31,952 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2021-05-03 15:03:31,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:31,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334091797] [2021-05-03 15:03:31,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353705913] [2021-05-03 15:03:31,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:03:31,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:03:31,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:03:31,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 15:03:31,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:03:32,284 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-05-03 15:03:33,116 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-03 15:03:33,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:03:33,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 15:03:33,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:34,685 WARN L205 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 102 DAG size of output: 96 [2021-05-03 15:03:34,687 INFO L628 ElimStorePlain]: treesize reduction 171, result has 67.2 percent of original size [2021-05-03 15:03:34,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:03:34,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:03:34,702 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:35,274 WARN L205 SmtUtils]: Spent 571.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-05-03 15:03:35,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:03:35,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:03:35,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:03:35,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:03:35,295 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:35,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:03:35,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 15:03:35,312 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:35,911 WARN L205 SmtUtils]: Spent 599.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-05-03 15:03:35,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:03:35,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:03:35,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:03:35,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 15:03:35,931 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:35,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:03:35,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:03:35,948 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:36,496 WARN L205 SmtUtils]: Spent 548.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-05-03 15:03:36,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:03:36,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:03:36,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:03:36,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 15:03:36,516 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:36,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:03:36,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:03:36,533 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:37,015 WARN L205 SmtUtils]: Spent 481.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-05-03 15:03:37,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:03:37,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:03:37,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 15:03:37,033 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:37,493 WARN L205 SmtUtils]: Spent 459.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-05-03 15:03:37,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:03:37,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-05-03 15:03:37,514 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:529, output treesize:241 [2021-05-03 15:03:38,420 WARN L205 SmtUtils]: Spent 781.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 88 [2021-05-03 15:03:39,818 WARN L205 SmtUtils]: Spent 673.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-05-03 15:03:40,218 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-05-03 15:03:40,448 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-05-03 15:03:40,489 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:40,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:03:40,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 15:03:40,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598173847] [2021-05-03 15:03:40,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 15:03:40,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:03:40,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 15:03:40,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:03:40,490 INFO L87 Difference]: Start difference. First operand 363 states and 1033 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:03:40,831 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-05-03 15:03:41,437 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-05-03 15:03:42,448 WARN L205 SmtUtils]: Spent 680.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2021-05-03 15:03:43,671 WARN L205 SmtUtils]: Spent 832.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2021-05-03 15:03:45,063 WARN L205 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 146 DAG size of output: 130 [2021-05-03 15:03:46,422 WARN L205 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 91 DAG size of output: 80 [2021-05-03 15:03:47,277 WARN L205 SmtUtils]: Spent 644.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 43 [2021-05-03 15:03:49,205 WARN L205 SmtUtils]: Spent 1.79 s on a formula simplification. DAG size of input: 115 DAG size of output: 86 [2021-05-03 15:03:51,549 WARN L205 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 134 DAG size of output: 95 [2021-05-03 15:03:51,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:03:51,652 INFO L93 Difference]: Finished difference Result 583 states and 1593 transitions. [2021-05-03 15:03:51,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 15:03:51,655 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 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 20 [2021-05-03 15:03:51,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:03:51,656 INFO L225 Difference]: With dead ends: 583 [2021-05-03 15:03:51,656 INFO L226 Difference]: Without dead ends: 521 [2021-05-03 15:03:51,656 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 14167.1ms TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2021-05-03 15:03:51,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-05-03 15:03:51,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 369. [2021-05-03 15:03:51,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 2.842391304347826) internal successors, (1046), 368 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:03:51,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1046 transitions. [2021-05-03 15:03:51,660 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1046 transitions. Word has length 20 [2021-05-03 15:03:51,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:03:51,660 INFO L480 AbstractCegarLoop]: Abstraction has 369 states and 1046 transitions. [2021-05-03 15:03:51,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:03:51,660 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1046 transitions. [2021-05-03 15:03:51,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 15:03:51,660 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:03:51,660 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:03:51,861 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3361 [2021-05-03 15:03:51,861 INFO L428 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:03:51,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:03:51,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1363016558, now seen corresponding path program 29 times [2021-05-03 15:03:51,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:03:51,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160522874] [2021-05-03 15:03:51,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:03:51,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:03:52,243 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-05-03 15:03:52,441 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-05-03 15:03:52,860 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2021-05-03 15:03:53,280 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-05-03 15:03:53,804 WARN L205 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2021-05-03 15:03:54,071 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-05-03 15:03:54,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:54,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160522874] [2021-05-03 15:03:54,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326987943] [2021-05-03 15:03:54,074 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:03:54,096 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:03:54,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:03:54,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 15:03:54,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:03:54,476 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-03 15:03:54,757 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-05-03 15:03:55,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-05-03 15:03:55,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:55,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:03:55,056 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:55,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-05-03 15:03:55,070 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:55,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 15:03:55,084 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:55,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 15:03:55,097 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:55,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 15:03:55,111 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:55,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 15:03:55,125 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:55,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:03:55,138 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:55,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 15:03:55,151 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:55,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 15:03:55,164 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:55,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-05-03 15:03:55,178 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:55,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-05-03 15:03:55,192 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:55,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-05-03 15:03:55,206 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:55,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 15:03:55,220 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:55,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 15:03:55,233 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:55,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 15:03:55,247 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:55,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-05-03 15:03:55,260 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:55,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-05-03 15:03:55,273 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-05-03 15:03:55,879 WARN L205 SmtUtils]: Spent 606.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-05-03 15:03:55,880 INFO L628 ElimStorePlain]: treesize reduction 103, result has 63.5 percent of original size [2021-05-03 15:03:55,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-05-03 15:03:55,884 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 1 variables, input treesize:751, output treesize:179 [2021-05-03 15:03:56,255 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-03 15:03:56,748 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-05-03 15:03:57,053 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-03 15:03:57,417 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2021-05-03 15:03:57,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:03:57,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:03:57,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 15:03:57,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928536949] [2021-05-03 15:03:57,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 15:03:57,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:03:57,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 15:03:57,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-05-03 15:03:57,470 INFO L87 Difference]: Start difference. First operand 369 states and 1046 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:03:57,810 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-05-03 15:03:58,394 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-05-03 15:03:59,161 WARN L205 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-05-03 15:04:00,016 WARN L205 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 48 [2021-05-03 15:04:01,218 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 92 DAG size of output: 70 [2021-05-03 15:04:02,357 WARN L205 SmtUtils]: Spent 966.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-05-03 15:04:03,808 WARN L205 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 100 DAG size of output: 67 [2021-05-03 15:04:05,391 WARN L205 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 122 DAG size of output: 74 [2021-05-03 15:04:05,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:04:05,485 INFO L93 Difference]: Finished difference Result 543 states and 1485 transitions. [2021-05-03 15:04:05,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 15:04:05,489 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 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 20 [2021-05-03 15:04:05,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:04:05,490 INFO L225 Difference]: With dead ends: 543 [2021-05-03 15:04:05,490 INFO L226 Difference]: Without dead ends: 518 [2021-05-03 15:04:05,490 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 10814.8ms TimeCoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2021-05-03 15:04:05,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-05-03 15:04:05,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 366. [2021-05-03 15:04:05,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.8438356164383563) internal successors, (1038), 365 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:04:05,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1038 transitions. [2021-05-03 15:04:05,498 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1038 transitions. Word has length 20 [2021-05-03 15:04:05,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:04:05,498 INFO L480 AbstractCegarLoop]: Abstraction has 366 states and 1038 transitions. [2021-05-03 15:04:05,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:04:05,499 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1038 transitions. [2021-05-03 15:04:05,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 15:04:05,499 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:04:05,499 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:04:05,699 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3432,231 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:04:05,700 INFO L428 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:04:05,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:04:05,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1536264250, now seen corresponding path program 30 times [2021-05-03 15:04:05,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:04:05,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421050437] [2021-05-03 15:04:05,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:04:05,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:04:05,967 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-05-03 15:04:06,177 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-05-03 15:04:06,423 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-05-03 15:04:06,682 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-05-03 15:04:07,115 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-05-03 15:04:07,466 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-05-03 15:04:07,704 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2021-05-03 15:04:07,881 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2021-05-03 15:04:07,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:04:07,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421050437] [2021-05-03 15:04:07,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735719351] [2021-05-03 15:04:07,885 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:04:07,908 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 15:04:07,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:04:07,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-03 15:04:07,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:04:08,281 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-05-03 15:04:08,660 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-03 15:04:09,309 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 67 [2021-05-03 15:04:09,814 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-05-03 15:04:11,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:04:11,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:04:11,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 15:04:11,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:04:11,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:04:11,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:04:11,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 15:04:11,459 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 15:04:11,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:04:11,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-05-03 15:04:11,482 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 15:04:13,899 WARN L205 SmtUtils]: Spent 2.42 s on a formula simplification. DAG size of input: 150 DAG size of output: 144 [2021-05-03 15:04:13,901 INFO L628 ElimStorePlain]: treesize reduction 211, result has 74.0 percent of original size [2021-05-03 15:04:13,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:04:13,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:04:13,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:04:13,922 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 15:04:13,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:04:13,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 15:04:13,940 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 15:04:15,221 WARN L205 SmtUtils]: Spent 1.28 s on a formula simplification that was a NOOP. DAG size: 140 [2021-05-03 15:04:15,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:04:15,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:04:15,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:04:15,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 15:04:15,247 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 15:04:15,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:04:15,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:04:15,268 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 15:04:16,407 WARN L205 SmtUtils]: Spent 1.14 s on a formula simplification that was a NOOP. DAG size: 136 [2021-05-03 15:04:16,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:04:16,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:04:16,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:04:16,427 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 15:04:17,516 WARN L205 SmtUtils]: Spent 1.09 s on a formula simplification that was a NOOP. DAG size: 132 [2021-05-03 15:04:17,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:04:17,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:04:17,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 15:04:17,535 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 15:04:18,749 WARN L205 SmtUtils]: Spent 1.21 s on a formula simplification that was a NOOP. DAG size: 128 [2021-05-03 15:04:18,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:04:18,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:04:18,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 15:04:18,770 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 15:04:19,904 WARN L205 SmtUtils]: Spent 1.13 s on a formula simplification that was a NOOP. DAG size: 124 [2021-05-03 15:04:19,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:04:19,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:04:19,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 15:04:19,922 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 15:04:21,085 WARN L205 SmtUtils]: Spent 1.16 s on a formula simplification that was a NOOP. DAG size: 120 [2021-05-03 15:04:21,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:04:21,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:04:21,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:04:21,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:04:21,113 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 15:04:21,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:04:21,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 15:04:21,132 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 15:04:22,273 WARN L205 SmtUtils]: Spent 1.14 s on a formula simplification that was a NOOP. DAG size: 114 [2021-05-03 15:04:22,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:04:22,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: 10 dim-0 vars, and 12 xjuncts. [2021-05-03 15:04:22,308 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 16 variables, input treesize:929, output treesize:507 [2021-05-03 15:04:23,953 WARN L205 SmtUtils]: Spent 1.44 s on a formula simplification. DAG size of input: 152 DAG size of output: 152 [2021-05-03 15:04:26,627 WARN L205 SmtUtils]: Spent 1.71 s on a formula simplification. DAG size of input: 354 DAG size of output: 169 [2021-05-03 15:04:32,632 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_712, v_prenex_702, v_prenex_714, v_prenex_704, v_prenex_716, v_prenex_706, get_6, v_prenex_718, v_prenex_708, v_prenex_698, v_prenex_710, v_prenex_700], 1=[v_prenex_701, get_3, v_prenex_713, v_prenex_703, v_prenex_715, v_prenex_705, v_prenex_717, v_prenex_707, v_prenex_709, v_prenex_697, v_prenex_699, v_prenex_711]} [2021-05-03 15:04:32,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-05-03 15:04:32,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:04:32,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:04:32,693 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 15:04:32,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 15:04:32,731 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 15:04:32,759 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 15:04:32,764 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 15:04:32,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:04:32,799 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 15:04:32,826 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 15:04:32,830 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 15:04:37,544 WARN L205 SmtUtils]: Spent 4.71 s on a formula simplification. DAG size of input: 313 DAG size of output: 182 [2021-05-03 15:04:37,546 INFO L628 ElimStorePlain]: treesize reduction 3696, result has 14.9 percent of original size [2021-05-03 15:04:37,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 15:04:37,566 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 15:04:38,786 WARN L205 SmtUtils]: Spent 1.22 s on a formula simplification that was a NOOP. DAG size: 177 [2021-05-03 15:04:38,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:04:38,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 15:04:38,814 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 15:04:40,184 WARN L205 SmtUtils]: Spent 1.37 s on a formula simplification that was a NOOP. DAG size: 172 [2021-05-03 15:04:40,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:04:40,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 15:04:40,204 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 15:04:41,402 WARN L205 SmtUtils]: Spent 1.20 s on a formula simplification that was a NOOP. DAG size: 164 [2021-05-03 15:04:41,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:04:41,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 15:04:41,423 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 15:04:42,596 WARN L205 SmtUtils]: Spent 1.17 s on a formula simplification that was a NOOP. DAG size: 157 [2021-05-03 15:04:42,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:04:42,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 15:04:42,616 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 15:04:43,784 WARN L205 SmtUtils]: Spent 1.17 s on a formula simplification that was a NOOP. DAG size: 152 [2021-05-03 15:04:43,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:04:43,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 15:04:43,805 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 15:04:45,005 WARN L205 SmtUtils]: Spent 1.20 s on a formula simplification that was a NOOP. DAG size: 147 [2021-05-03 15:04:45,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:04:45,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 15:04:45,026 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 15:04:46,198 WARN L205 SmtUtils]: Spent 1.17 s on a formula simplification that was a NOOP. DAG size: 142 [2021-05-03 15:04:46,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:04:46,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-05-03 15:04:46,217 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 15:04:47,389 WARN L205 SmtUtils]: Spent 1.17 s on a formula simplification that was a NOOP. DAG size: 136 [2021-05-03 15:04:47,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:04:47,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 15:04:47,411 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 15:04:48,604 WARN L205 SmtUtils]: Spent 1.19 s on a formula simplification that was a NOOP. DAG size: 128 [2021-05-03 15:04:48,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:04:48,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 15:04:48,625 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 15:04:49,730 WARN L205 SmtUtils]: Spent 1.11 s on a formula simplification that was a NOOP. DAG size: 120 [2021-05-03 15:04:49,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:04:49,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-05-03 15:04:49,749 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-05-03 15:04:50,889 WARN L205 SmtUtils]: Spent 1.14 s on a formula simplification that was a NOOP. DAG size: 114 [2021-05-03 15:04:50,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:04:50,890 INFO L518 ElimStorePlain]: Eliminatee v_prenex_701 vanished before elimination [2021-05-03 15:04:50,891 INFO L518 ElimStorePlain]: Eliminatee get_3 vanished before elimination [2021-05-03 15:04:50,891 INFO L518 ElimStorePlain]: Eliminatee v_prenex_713 vanished before elimination [2021-05-03 15:04:50,891 INFO L518 ElimStorePlain]: Eliminatee v_prenex_703 vanished before elimination [2021-05-03 15:04:50,891 INFO L518 ElimStorePlain]: Eliminatee v_prenex_715 vanished before elimination [2021-05-03 15:04:50,891 INFO L518 ElimStorePlain]: Eliminatee v_prenex_705 vanished before elimination [2021-05-03 15:04:50,891 INFO L518 ElimStorePlain]: Eliminatee v_prenex_717 vanished before elimination [2021-05-03 15:04:50,891 INFO L518 ElimStorePlain]: Eliminatee v_prenex_707 vanished before elimination [2021-05-03 15:04:50,891 INFO L518 ElimStorePlain]: Eliminatee v_prenex_709 vanished before elimination [2021-05-03 15:04:50,891 INFO L518 ElimStorePlain]: Eliminatee v_prenex_697 vanished before elimination [2021-05-03 15:04:50,891 INFO L518 ElimStorePlain]: Eliminatee v_prenex_699 vanished before elimination [2021-05-03 15:04:50,891 INFO L518 ElimStorePlain]: Eliminatee v_prenex_711 vanished before elimination [2021-05-03 15:04:50,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 24 dim-1 vars, End of recursive call: and 18 xjuncts. [2021-05-03 15:04:50,898 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 36 variables, input treesize:4519, output treesize:487 [2021-05-03 15:04:52,950 WARN L205 SmtUtils]: Spent 1.94 s on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-05-03 15:04:53,799 WARN L205 SmtUtils]: Spent 550.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-05-03 15:04:53,852 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:04:53,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:04:53,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 15:04:53,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799149219] [2021-05-03 15:04:53,853 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 15:04:53,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:04:53,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 15:04:53,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:04:53,853 INFO L87 Difference]: Start difference. First operand 366 states and 1038 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:04:55,581 WARN L205 SmtUtils]: Spent 851.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 86 [2021-05-03 15:04:57,214 WARN L205 SmtUtils]: Spent 948.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 90 [2021-05-03 15:05:00,255 WARN L205 SmtUtils]: Spent 2.79 s on a formula simplification. DAG size of input: 199 DAG size of output: 178 [2021-05-03 15:05:06,976 WARN L205 SmtUtils]: Spent 6.31 s on a formula simplification. DAG size of input: 310 DAG size of output: 289 [2021-05-03 15:05:09,632 WARN L205 SmtUtils]: Spent 2.28 s on a formula simplification. DAG size of input: 81 DAG size of output: 80 [2021-05-03 15:05:12,842 WARN L205 SmtUtils]: Spent 2.99 s on a formula simplification. DAG size of input: 98 DAG size of output: 97 [2021-05-03 15:05:12,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:05:12,905 INFO L93 Difference]: Finished difference Result 516 states and 1436 transitions. [2021-05-03 15:05:12,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 15:05:12,910 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 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 20 [2021-05-03 15:05:12,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:05:12,911 INFO L225 Difference]: With dead ends: 516 [2021-05-03 15:05:12,911 INFO L226 Difference]: Without dead ends: 481 [2021-05-03 15:05:12,911 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 26498.1ms TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-05-03 15:05:12,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-05-03 15:05:12,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 360. [2021-05-03 15:05:12,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 2.8551532033426184) internal successors, (1025), 359 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:05:12,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1025 transitions. [2021-05-03 15:05:12,916 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1025 transitions. Word has length 20 [2021-05-03 15:05:12,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:05:12,916 INFO L480 AbstractCegarLoop]: Abstraction has 360 states and 1025 transitions. [2021-05-03 15:05:12,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:05:12,916 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1025 transitions. [2021-05-03 15:05:12,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 15:05:12,916 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:05:12,916 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:05:13,117 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3462 [2021-05-03 15:05:13,117 INFO L428 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:05:13,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:05:13,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1281321126, now seen corresponding path program 31 times [2021-05-03 15:05:13,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:05:13,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876584973] [2021-05-03 15:05:13,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:05:13,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:05:13,432 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-03 15:05:13,903 WARN L205 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-05-03 15:05:14,380 WARN L205 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-05-03 15:05:14,803 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-05-03 15:05:15,277 WARN L205 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-05-03 15:05:15,625 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-05-03 15:05:15,901 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2021-05-03 15:05:15,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:05:15,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876584973] [2021-05-03 15:05:15,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816166256] [2021-05-03 15:05:15,905 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:05:15,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:05:15,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 15:05:15,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:05:16,348 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-05-03 15:05:16,783 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 15:05:17,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:05:17,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:05:17,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:05:17,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:05:17,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:05:17,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:05:17,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:05:17,307 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 15:05:17,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:05:17,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 15:05:17,328 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 15:05:18,737 WARN L205 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 92 DAG size of output: 88 [2021-05-03 15:05:18,738 INFO L628 ElimStorePlain]: treesize reduction 106, result has 72.8 percent of original size [2021-05-03 15:05:18,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:05:18,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:05:18,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:05:18,756 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 15:05:18,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:05:18,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 15:05:18,770 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 15:05:19,337 WARN L205 SmtUtils]: Spent 566.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-05-03 15:05:19,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:05:19,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:05:19,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 15:05:19,361 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 15:05:19,915 WARN L205 SmtUtils]: Spent 553.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-05-03 15:05:19,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:05:19,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:05:19,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 15:05:19,933 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 15:05:20,534 WARN L205 SmtUtils]: Spent 600.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-05-03 15:05:20,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:05:20,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:05:20,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:05:20,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 15:05:20,557 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 15:05:20,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:05:20,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:05:20,574 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 15:05:21,208 WARN L205 SmtUtils]: Spent 633.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-05-03 15:05:21,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:05:21,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:05:21,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:05:21,234 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 15:05:21,910 WARN L205 SmtUtils]: Spent 676.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-05-03 15:05:21,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:05:21,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-05-03 15:05:21,957 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:465, output treesize:193 [2021-05-03 15:05:23,069 WARN L205 SmtUtils]: Spent 887.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 82 [2021-05-03 15:05:23,933 WARN L205 SmtUtils]: Spent 641.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2021-05-03 15:05:24,866 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 65 [2021-05-03 15:05:25,554 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-05-03 15:05:26,697 WARN L205 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-05-03 15:05:26,969 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-05-03 15:05:27,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:05:27,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:05:27,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 15:05:27,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955586402] [2021-05-03 15:05:27,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 15:05:27,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:05:27,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 15:05:27,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:05:27,010 INFO L87 Difference]: Start difference. First operand 360 states and 1025 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:05:27,514 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-05-03 15:05:28,198 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-05-03 15:05:29,988 WARN L205 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 127 DAG size of output: 109 [2021-05-03 15:05:30,419 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-03 15:05:34,871 WARN L205 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 143 DAG size of output: 121 [2021-05-03 15:05:35,933 WARN L205 SmtUtils]: Spent 666.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 15:05:42,660 WARN L205 SmtUtils]: Spent 6.30 s on a formula simplification. DAG size of input: 154 DAG size of output: 127 [2021-05-03 15:05:43,998 WARN L205 SmtUtils]: Spent 991.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2021-05-03 15:05:51,523 WARN L205 SmtUtils]: Spent 7.09 s on a formula simplification. DAG size of input: 158 DAG size of output: 134 [2021-05-03 15:05:53,465 WARN L205 SmtUtils]: Spent 1.60 s on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2021-05-03 15:06:02,090 WARN L205 SmtUtils]: Spent 8.20 s on a formula simplification. DAG size of input: 168 DAG size of output: 141 [2021-05-03 15:06:03,979 WARN L205 SmtUtils]: Spent 1.54 s on a formula simplification. DAG size of input: 86 DAG size of output: 81 [2021-05-03 15:06:13,428 WARN L205 SmtUtils]: Spent 8.95 s on a formula simplification. DAG size of input: 175 DAG size of output: 148 [2021-05-03 15:06:15,352 WARN L205 SmtUtils]: Spent 1.67 s on a formula simplification. DAG size of input: 94 DAG size of output: 88 [2021-05-03 15:06:21,290 WARN L205 SmtUtils]: Spent 5.45 s on a formula simplification. DAG size of input: 161 DAG size of output: 140 [2021-05-03 15:06:21,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:06:21,304 INFO L93 Difference]: Finished difference Result 933 states and 2485 transitions. [2021-05-03 15:06:21,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 15:06:21,308 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 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 20 [2021-05-03 15:06:21,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:06:21,310 INFO L225 Difference]: With dead ends: 933 [2021-05-03 15:06:21,310 INFO L226 Difference]: Without dead ends: 878 [2021-05-03 15:06:21,311 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 58376.5ms TimeCoverageRelationStatistics Valid=223, Invalid=899, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 15:06:21,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-05-03 15:06:21,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 374. [2021-05-03 15:06:21,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 2.8847184986595176) internal successors, (1076), 373 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:06:21,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 1076 transitions. [2021-05-03 15:06:21,320 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 1076 transitions. Word has length 20 [2021-05-03 15:06:21,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:06:21,320 INFO L480 AbstractCegarLoop]: Abstraction has 374 states and 1076 transitions. [2021-05-03 15:06:21,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:06:21,320 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 1076 transitions. [2021-05-03 15:06:21,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 15:06:21,320 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:06:21,321 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:06:21,521 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3913 [2021-05-03 15:06:21,521 INFO L428 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:06:21,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:06:21,522 INFO L82 PathProgramCache]: Analyzing trace with hash 884403472, now seen corresponding path program 32 times [2021-05-03 15:06:21,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:06:21,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693460990] [2021-05-03 15:06:21,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:06:21,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:06:21,736 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-05-03 15:06:21,896 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-03 15:06:22,462 WARN L205 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-05-03 15:06:23,014 WARN L205 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-05-03 15:06:23,550 WARN L205 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-05-03 15:06:24,377 WARN L205 SmtUtils]: Spent 769.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2021-05-03 15:06:24,824 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-05-03 15:06:25,240 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-05-03 15:06:25,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:06:25,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693460990] [2021-05-03 15:06:25,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347422452] [2021-05-03 15:06:25,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:06:25,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:06:25,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:06:25,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 15:06:25,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:06:25,791 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-05-03 15:06:26,205 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 15:06:26,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:06:26,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:06:26,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-05-03 15:06:26,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:06:26,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:06:26,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:06:26,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 15:06:26,833 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 15:06:26,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:06:26,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:06:26,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 15:06:26,856 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 15:06:26,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:06:26,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:06:26,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 15:06:26,882 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 15:06:26,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:06:26,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:06:26,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-05-03 15:06:26,906 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 15:06:26,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:06:26,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 15:06:26,924 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 15:06:28,487 WARN L205 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2021-05-03 15:06:28,489 INFO L628 ElimStorePlain]: treesize reduction 296, result has 48.0 percent of original size [2021-05-03 15:06:28,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:06:28,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:06:28,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 15:06:28,513 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 15:06:28,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:06:28,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:06:28,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-05-03 15:06:28,538 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 15:06:28,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:06:28,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:06:28,557 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 15:06:29,645 WARN L205 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-05-03 15:06:29,647 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.6 percent of original size [2021-05-03 15:06:29,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:06:29,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:06:29,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-05-03 15:06:29,664 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 15:06:29,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:06:29,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:06:29,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 15:06:29,681 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 15:06:29,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:06:29,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:06:29,695 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 15:06:30,211 WARN L205 SmtUtils]: Spent 515.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-03 15:06:30,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:06:30,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-05-03 15:06:30,245 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:751, output treesize:198 [2021-05-03 15:06:30,776 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-05-03 15:06:31,381 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-05-03 15:06:32,380 WARN L205 SmtUtils]: Spent 459.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-05-03 15:06:33,999 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-05-03 15:06:34,764 WARN L205 SmtUtils]: Spent 591.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-05-03 15:06:35,207 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-05-03 15:06:35,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:06:35,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:06:35,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 15:06:35,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973543562] [2021-05-03 15:06:35,287 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 15:06:35,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:06:35,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 15:06:35,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:06:35,288 INFO L87 Difference]: Start difference. First operand 374 states and 1076 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:06:35,844 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-05-03 15:06:36,768 WARN L205 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-05-03 15:06:38,858 WARN L205 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 133 DAG size of output: 110 [2021-05-03 15:06:43,040 WARN L205 SmtUtils]: Spent 3.60 s on a formula simplification. DAG size of input: 154 DAG size of output: 125 [2021-05-03 15:06:47,171 WARN L205 SmtUtils]: Spent 3.36 s on a formula simplification. DAG size of input: 176 DAG size of output: 127 [2021-05-03 15:06:52,901 WARN L205 SmtUtils]: Spent 5.04 s on a formula simplification. DAG size of input: 183 DAG size of output: 140 [2021-05-03 15:07:00,681 WARN L205 SmtUtils]: Spent 6.69 s on a formula simplification. DAG size of input: 205 DAG size of output: 148 [2021-05-03 15:07:08,199 WARN L205 SmtUtils]: Spent 6.87 s on a formula simplification. DAG size of input: 226 DAG size of output: 157 [2021-05-03 15:07:08,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:07:08,491 INFO L93 Difference]: Finished difference Result 671 states and 1850 transitions. [2021-05-03 15:07:08,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 15:07:08,497 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 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 20 [2021-05-03 15:07:08,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:07:08,499 INFO L225 Difference]: With dead ends: 671 [2021-05-03 15:07:08,499 INFO L226 Difference]: Without dead ends: 656 [2021-05-03 15:07:08,499 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 37100.8ms TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-05-03 15:07:08,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2021-05-03 15:07:08,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 380. [2021-05-03 15:07:08,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 2.8970976253298155) internal successors, (1098), 379 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:07:08,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1098 transitions. [2021-05-03 15:07:08,507 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1098 transitions. Word has length 20 [2021-05-03 15:07:08,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:07:08,507 INFO L480 AbstractCegarLoop]: Abstraction has 380 states and 1098 transitions. [2021-05-03 15:07:08,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:07:08,507 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1098 transitions. [2021-05-03 15:07:08,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 15:07:08,508 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:07:08,508 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:07:08,708 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3973,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:07:08,709 INFO L428 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:07:08,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:07:08,709 INFO L82 PathProgramCache]: Analyzing trace with hash -814316916, now seen corresponding path program 33 times [2021-05-03 15:07:08,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:07:08,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028654982] [2021-05-03 15:07:08,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:07:08,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:07:08,949 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2021-05-03 15:07:09,124 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-03 15:07:09,729 WARN L205 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-05-03 15:07:10,203 WARN L205 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-05-03 15:07:10,661 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-05-03 15:07:11,164 WARN L205 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-05-03 15:07:11,523 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-05-03 15:07:11,658 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:07:11,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028654982] [2021-05-03 15:07:11,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883524814] [2021-05-03 15:07:11,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:07:11,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 15:07:11,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:07:11,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 15:07:11,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:07:12,101 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-05-03 15:07:12,499 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 15:07:13,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:07:13,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:07:13,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 15:07:13,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:07:13,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:07:13,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:07:13,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-05-03 15:07:13,142 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 15:07:13,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:07:13,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:07:13,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 15:07:13,163 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 15:07:13,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:07:13,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:07:13,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-05-03 15:07:13,184 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 15:07:13,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:07:13,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:07:13,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 15:07:13,205 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 15:07:13,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:07:13,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-05-03 15:07:13,225 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 15:07:14,735 WARN L205 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-05-03 15:07:14,737 INFO L628 ElimStorePlain]: treesize reduction 303, result has 46.7 percent of original size [2021-05-03 15:07:14,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:07:14,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:07:14,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 15:07:14,756 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 15:07:14,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:07:14,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:07:14,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:07:14,775 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 15:07:14,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:07:14,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 15:07:14,791 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 15:07:15,404 WARN L205 SmtUtils]: Spent 612.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-05-03 15:07:15,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:07:15,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:07:15,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:07:15,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 15:07:15,425 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 15:07:15,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:07:15,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:07:15,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-05-03 15:07:15,445 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 15:07:15,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:07:15,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:07:15,462 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 15:07:16,610 WARN L205 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2021-05-03 15:07:16,613 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.5 percent of original size [2021-05-03 15:07:16,657 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 7 dim-0 vars, and 9 xjuncts. [2021-05-03 15:07:16,657 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:751, output treesize:191 [2021-05-03 15:07:17,234 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-05-03 15:07:17,873 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-05-03 15:07:18,988 WARN L205 SmtUtils]: Spent 496.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-05-03 15:07:21,058 WARN L205 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-05-03 15:07:21,719 WARN L205 SmtUtils]: Spent 520.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-05-03 15:07:22,074 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-05-03 15:07:22,167 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:07:22,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:07:22,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 15:07:22,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418378519] [2021-05-03 15:07:22,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 15:07:22,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:07:22,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 15:07:22,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:07:22,168 INFO L87 Difference]: Start difference. First operand 380 states and 1098 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:07:23,485 WARN L205 SmtUtils]: Spent 629.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-05-03 15:07:23,987 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 15:07:26,142 WARN L205 SmtUtils]: Spent 1.87 s on a formula simplification. DAG size of input: 113 DAG size of output: 110 [2021-05-03 15:07:27,029 WARN L205 SmtUtils]: Spent 594.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-05-03 15:07:29,967 WARN L205 SmtUtils]: Spent 2.56 s on a formula simplification. DAG size of input: 117 DAG size of output: 115 [2021-05-03 15:07:31,278 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-05-03 15:07:36,442 WARN L205 SmtUtils]: Spent 4.80 s on a formula simplification. DAG size of input: 133 DAG size of output: 124 [2021-05-03 15:07:38,158 WARN L205 SmtUtils]: Spent 956.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2021-05-03 15:07:43,471 WARN L205 SmtUtils]: Spent 4.89 s on a formula simplification. DAG size of input: 144 DAG size of output: 130 [2021-05-03 15:07:45,642 WARN L205 SmtUtils]: Spent 1.80 s on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2021-05-03 15:07:51,612 WARN L205 SmtUtils]: Spent 5.75 s on a formula simplification. DAG size of input: 153 DAG size of output: 137 [2021-05-03 15:07:53,794 WARN L205 SmtUtils]: Spent 1.93 s on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2021-05-03 15:07:54,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:07:54,048 INFO L93 Difference]: Finished difference Result 927 states and 2472 transitions. [2021-05-03 15:07:54,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 15:07:54,054 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 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 20 [2021-05-03 15:07:54,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:07:54,055 INFO L225 Difference]: With dead ends: 927 [2021-05-03 15:07:54,055 INFO L226 Difference]: Without dead ends: 890 [2021-05-03 15:07:54,056 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 35762.7ms TimeCoverageRelationStatistics Valid=186, Invalid=744, Unknown=0, NotChecked=0, Total=930 [2021-05-03 15:07:54,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2021-05-03 15:07:54,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 383. [2021-05-03 15:07:54,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 2.910994764397906) internal successors, (1112), 382 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:07:54,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1112 transitions. [2021-05-03 15:07:54,063 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1112 transitions. Word has length 20 [2021-05-03 15:07:54,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:07:54,063 INFO L480 AbstractCegarLoop]: Abstraction has 383 states and 1112 transitions. [2021-05-03 15:07:54,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:07:54,063 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1112 transitions. [2021-05-03 15:07:54,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 15:07:54,063 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:07:54,063 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:07:54,264 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4078 [2021-05-03 15:07:54,264 INFO L428 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:07:54,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:07:54,265 INFO L82 PathProgramCache]: Analyzing trace with hash -987564608, now seen corresponding path program 34 times [2021-05-03 15:07:54,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:07:54,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004019494] [2021-05-03 15:07:54,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:07:54,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:07:54,592 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-03 15:07:54,840 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 15:07:55,106 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-03 15:07:55,400 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 15:07:55,595 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-05-03 15:07:55,784 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-05-03 15:07:55,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:07:55,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004019494] [2021-05-03 15:07:55,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057781183] [2021-05-03 15:07:55,956 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:07:55,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:07:55,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:07:55,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 15:07:55,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:07:56,501 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-05-03 15:07:57,018 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 15:07:57,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:07:57,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:07:57,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:07:57,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:07:57,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:07:57,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:07:57,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 15:07:57,729 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 15:07:57,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:07:57,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:07:57,755 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 15:07:59,362 WARN L205 SmtUtils]: Spent 1.61 s on a formula simplification. DAG size of input: 92 DAG size of output: 88 [2021-05-03 15:07:59,364 INFO L628 ElimStorePlain]: treesize reduction 106, result has 72.8 percent of original size [2021-05-03 15:07:59,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:07:59,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:07:59,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 15:07:59,387 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 15:07:59,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:07:59,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-05-03 15:07:59,407 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. Received shutdown request... [2021-05-03 15:07:59,834 WARN L222 SmtUtils]: Removed 7 from assertion stack [2021-05-03 15:08:00,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4157,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:08:00,035 WARN L545 AbstractCegarLoop]: Verification canceled [2021-05-03 15:08:00,038 WARN L224 ceAbstractionStarter]: Timeout [2021-05-03 15:08:00,039 INFO L202 PluginConnector]: Adding new model word-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 03:08:00 BasicIcfg [2021-05-03 15:08:00,039 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 15:08:00,039 INFO L168 Benchmark]: Toolchain (without parser) took 853867.07 ms. Allocated memory was 337.6 MB in the beginning and 488.6 MB in the end (delta: 151.0 MB). Free memory was 316.8 MB in the beginning and 273.4 MB in the end (delta: 43.4 MB). Peak memory consumption was 195.2 MB. Max. memory is 16.0 GB. [2021-05-03 15:08:00,039 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 337.6 MB. Free memory was 318.2 MB in the beginning and 318.1 MB in the end (delta: 71.1 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 15:08:00,039 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.31 ms. Allocated memory is still 337.6 MB. Free memory was 316.7 MB in the beginning and 315.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 15:08:00,039 INFO L168 Benchmark]: Boogie Preprocessor took 17.73 ms. Allocated memory is still 337.6 MB. Free memory was 315.2 MB in the beginning and 314.1 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 15:08:00,039 INFO L168 Benchmark]: RCFGBuilder took 392.33 ms. Allocated memory is still 337.6 MB. Free memory was 314.1 MB in the beginning and 315.5 MB in the end (delta: -1.4 MB). Peak memory consumption was 23.6 MB. Max. memory is 16.0 GB. [2021-05-03 15:08:00,039 INFO L168 Benchmark]: TraceAbstraction took 853422.83 ms. Allocated memory was 337.6 MB in the beginning and 488.6 MB in the end (delta: 151.0 MB). Free memory was 314.4 MB in the beginning and 273.4 MB in the end (delta: 41.1 MB). Peak memory consumption was 192.6 MB. Max. memory is 16.0 GB. [2021-05-03 15:08:00,040 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 0.12 ms. Allocated memory is still 337.6 MB. Free memory was 318.2 MB in the beginning and 318.1 MB in the end (delta: 71.1 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 30.31 ms. Allocated memory is still 337.6 MB. Free memory was 316.7 MB in the beginning and 315.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 17.73 ms. Allocated memory is still 337.6 MB. Free memory was 315.2 MB in the beginning and 314.1 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 392.33 ms. Allocated memory is still 337.6 MB. Free memory was 314.1 MB in the beginning and 315.5 MB in the end (delta: -1.4 MB). Peak memory consumption was 23.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 853422.83 ms. Allocated memory was 337.6 MB in the beginning and 488.6 MB in the end (delta: 151.0 MB). Free memory was 314.4 MB in the beginning and 273.4 MB in the end (delta: 41.1 MB). Peak memory consumption was 192.6 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 128]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 128). Cancelled while BasicCegarLoop was analyzing trace of length 21 with TraceHistMax 1,while TraceCheckSpWp was constructing forward predicates,while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations,while SimplifyDDAWithTimeout was simplifying term of DAG size 84 for 424ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 853310.8ms, OverallIterations: 426, TraceHistogramMax: 1, EmptinessCheckTime: 181.0ms, AutomataDifference: 446364.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 30.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 20991 SDtfs, 37389 SDslu, 76273 SDs, 0 SdLazy, 59046 SolverSat, 2665 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 43942.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9165 GetRequests, 3994 SyntacticMatches, 192 SemanticMatches, 4979 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5921 ImplicationChecksByTransitivity, 508946.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=383occurred in iteration=425, InterpolantAutomatonStates: 3321, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1700.2ms AutomataMinimizationTime, 425 MinimizatonAttempts, 74449 StatesRemovedByMinimization, 423 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1056.4ms SsaConstructionTime, 2567.4ms SatisfiabilityAnalysisTime, 343720.7ms InterpolantComputationTime, 12148 NumberOfCodeBlocks, 12148 NumberOfCodeBlocksAsserted, 818 NumberOfCheckSat, 11489 ConstructedInterpolants, 236 QuantifiedInterpolants, 141034 SizeOfPredicates, 1404 NumberOfNonLiveVariables, 16554 ConjunctsInSsa, 2626 ConjunctsInUnsatCore, 659 InterpolantComputations, 191 PerfectInterpolantSequences, 296/968 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 could not prove your program: Timeout Completed graceful shutdown